Consider a particle inside the nucleus. The uncertainty Δx in its position is equal to the diameter of the nucleus. What is the uncertainty Δp of its momentum? To find this, use ΔxΔp≥ℏ2where ℏ=h2π.
Express your answer in kilogram-meters per second to two significant figures.

Answers

Answer 1

The uncertainty in momentum of a particle inside the nucleus is at least h/4π times the reciprocal of the radius of the nucleus.

According to Heisenberg's uncertainty principle, the product of the uncertainty in position (Δx) and the uncertainty in momentum (Δp) of a particle cannot be smaller than a certain value, which is equal to Planck's constant divided by 2π (ℏ=h/2π). This principle applies to all particles, including those inside a nucleus.

Given that the uncertainty in position (Δx) of a particle inside the nucleus is equal to the diameter of the nucleus, we can write:

Δx = 2r

where r is the radius of the nucleus.

Using the uncertainty principle, we have:

ΔxΔp≥ℏ2

Substituting Δx with 2r, we get:

2rΔp≥ℏ2

Solving for Δp, we obtain:

Δp≥ℏ2(2r)

Substituting ℏ=h/2π, we get:

Δp≥h/4πr

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Answer 2

The uncertainty in momentum of a particle inside the nucleus is at least h/4π times the reciprocal of the radius of the nucleus.

According to Heisenberg's uncertainty principle, the product of the uncertainty in position (Δx) and the uncertainty in momentum (Δp) of a particle cannot be smaller than a certain value, which is equal to Planck's constant divided by 2π (ℏ=h/2π). This principle applies to all particles, including those inside a nucleus.

Given that the uncertainty in position (Δx) of a particle inside the nucleus is equal to the diameter of the nucleus, we can write:

Δx = 2r

where r is the radius of the nucleus.

Using the uncertainty principle, we have:

ΔxΔp≥ℏ2

Substituting Δx with 2r, we get:

2rΔp≥ℏ2

Solving for Δp, we obtain:

Δp≥ℏ2(2r)

Substituting ℏ=h/2π, we get:

Δp≥h/4πr

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Related Questions

20 of 35
Which of the following is true?
A
All EM waves are transverse in shape, but mechanical waves can be
either transverse or longitudinal.
All mechanical waves are transverse in shape, but EM waves can be
either transverse or longitudinal.
b
SUBMIT ANSWER
B
D
All EM waves are longitudinal in shape, but mechanical waves can be
either transverse or longitudinal.
All mechanical waves are longitudinal in shape, but EM waves can be
either transverse or longitudinal.

Answers

B is the answer!


Explanation: It’s correct.

Two billiard balls of equal mass undergo a perfectly elastic head-on collision. If one ball's initial speed was 2. 00 m/s, and the other's was 3. 60 m/s in the opposite direction, what will be their speeds and directions after the collision?.

Answers

After the collision, the final velocity of both balls will be (2.00 + 3.60) m/s in the same direction.

What is collision?

The outcome of the two things applying force to one another. The kinetic energy of the two objects is transformed into the other forms, such heat or sound, when they contact. Both elastic and inelastic collisions exist. Both the colliding objects maintain their original energy in an elastic collision.

The first ball has kinetic energy of (1/2)mv² where m is the mass of the ball and v is the velocity. The second ball has kinetic energy of (1/2)m(3.60)²

After collision, the final velocity of both balls in the same direction can be calculated using the conservation of momentum.

m1v1 + m2v2 = m1v'1 + m2v'2

where m1,m2 are the mass of the balls, v1 and v2 are the initial velocities of the two balls and v'1 and v'2 are the final velocities of the two balls.

Given that the mass of the two balls is equal, you can simplify this equation as:

v1 + (-v2) = v'1 + v'2

and solving for v'1 and v'2 gives v'1 = (v1+v2) and v'2 = (v1+v2)

Therefore, after the collision, the final velocity of both balls will be (2.00 + 3.60) m/s in the same direction.

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A substance did not change its chemical nature in a reaction. Which most likely describes the reaction?

Answers

Answer:

The substance would of been frozen

Explanation:

A substance did not change its chemical nature in a reaction. Which most likely describes the reaction? It was frozen.

During which time period do you have to use your head lights?

Answers

Answer:at night.

Explanation:

calculate the movement of a 2000-kg truck travelling 19m/s

Answers

Answer:

The movement of a 2000-kg truck travelling at 19 m/s is 38,000 kgm/s.

A pile of gunpowder can represent chemical ____ energy , while a flying pulley can represent mechanical ____ energy

Answers

A pile of gunpowder can represent chemical potential energy , while a flying pulley can represent mechanical kinetic energy.

Thermal energy is kinetic energy associated with the random motion of atoms and molecules. Temperature is a quantitative measure of “hot” or “cold.” When the atoms and molecules in an object are moving or vibrating quickly, they have a higher average kinetic energy (KE), and we say that the object is “hot.”

The specific heat capacity (c) of a substance, commonly called its “specific heat,” is the quantity of heat required to raise the temperature of 1 gram of a substance by 1 degree Celsius (or 1 kelvin)..

Like matter, energy comes in different types. One scheme classifies energy into two types: potential energy, the energy an object has because of its relative position, composition, or condition, and kinetic energy, the energy that an object possesses because of its motion.

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8 An astronaut orbits the Earth in a space station. Which is a vector quantity? A B C D the weight of the astronaut the mass of the astronaut the speed of the satellite the temperature inside the satellite​

Answers

The space station's mass and the pull of its gravitational field on the planet(D)

Who is called astronaut?

Astronaut is a term for a person who has travelled to space that is derived from the Greek words for "star" and "sailor." More specifically, space travellers from the United States, Canada, Europe, and Japan are referred to as "astronauts" in the West. An astronaut is a person who has received specialised training in order to travel to space. A spaceship's astronauts may do a variety of tasks. Typically, a commander and a pilot collaborate to lead the mission. Other positions could be science pilot, mission expert, payload commander, and flight engineer.

How important is it to be an astronaut?

The astronaut does highly significant scientific research on Earth to advance technological advancement in addition to gathering samples, performing tests, and making minor repairs on spaceships and space stations. The study of space and even all the efforts made to escape the gravity of Earth have led to the production of items that we use every day as well as scientific theories that have altered our perceptions of space and our understanding of the origins of life on Earth.

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Particles q1, q2, and 9 are in a straight line.
Particles q1 = -5.00 • 10-6 C,92 = +2.50 • 10-6 C, and 93 = -2.50 • 10-6 C. Particles qi and q, are separated by 0.500 m. Particles q2 and q3 are separated by 0.250 m. What is the net force on q2?

Answers

Answer:

0.27475 N

Explanation:

To find the net force acting upon q2, we need to find the force exerted by q1 to q2 and the force exerted by q3 to q2, and to do that we should apply the formula

[tex]F = |\frac{kq_{1}q_{2} }{r^{2} }|[/tex]

where in k is coulomb's constant ([tex]8.99*10^9 \frac{Nm^{2}}{C^{2}}[/tex])

q1 and q2 are the charges

and r is the distance between the two charges.

Finding the force exerted to q2 by q1:

[tex]F = |\frac{(8.99*10^{9} * (-5*10^{-6}) * (2.5*10^{-6})}{(0.500)^{2}}|[/tex]

F = 0.4995 N

q1 would be attracted to q2, so it would go to the right, so it's a positive force

Finding the force exerted to q2 by q3:

[tex]F =|\frac{(8.99*10^{9})*(-2.5*10^{-6})*(2.5*10^{6})}{0.250^{2}}|[/tex]

F = 0.22475 N

q3 would be attracted to q2, so it would go to the left, so it's a negative force

F = -0.22475N

Add-up the forces: 0.4995 + (-0.22475) = 0.27475 N

Answer the following automotive services question. Main drive gear = 35 teeth speed of main drive gear = 450 r. P. M. Countershaft drive gear = 70 teeth speed of countershaft drive gear = r. P. M.

Answers

The speed of countershaft drive gear is 225 RPM.  To find it, you have to compare both STM value.

How to calculate the speed of that countershaft drive gear?

To calculate the the speed of countershaft drive, we use the formula of the surface teeth per minute (STM) where the formula is:

the surface teeth per minute (STM) = Speed x number of teeth

Because of the main drive gear is connected with the countershaft drive gear, the STM of both are equivalent. So.

Main gear speed x Main gear number of teeth = countershaft speed x countershaft  number of speed

35 teeth x 450 RPM = 70 teeth x "x" RPM

450 RPm = 2 x "x" RPM

x = 450 : 2 RPM

x  = 225 RPM

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Two cars A and B are initially at the same position. Car A starts moving at constant speed of 4m/s. If car B starts moving at constant speed of 8m/s, 2 seconds later after car A moved, where does car B overtakes car A? A. 12m B. 30m C. 16m D. 24m​

Answers

Answer:

16 m

Explanation:

(4 m/s)(t + 2 s) = (8 m/s)t

4t + 8 = 8t

8 = 4t

t = 8/4 = 2 sec

This means that after Car A has traveled for 4 sec, Car B catches up to it after it has traveled 2 s (having left 2 s after Car A).

Where do they meet up:

d = rt

Car B:  d = (8 m/s)(2 s) = 16 m

Car A:  d = (4 m/s)( 2 s + 2 s) = 16 m   **always check both equations to make sure your answer is correct

In aerobic respiration, glucose and oxygen are used up and carbon dioxide, water and __________ are released.

Answers

the filling to your question is byproducts.

A twig at rest in a pond moves with a speed of 0.40 cm/s
opposite a 2.5 g snail, which has a speed of 1.2 cm/s.
What is the mass of the twig?

Answers

The mass of the twig is determined as 7.5 g.

What is the mass of the twig?

The mass of the twig is calculated by applying the principle of conservation of linear momentum as shown below.

This principle states that the sum of initial momentum of a system is equal to the sum of the final momentum of the system, provided the system is isolated.

Pi = Pf

where;

Pi is the momentum of the twigPf is the momentum of the snail

(0.4  x m ) = ( 1.2 x 2.5 )

m = ( 1.2 x 2.5 ) / ( 0.4 )

m = 7.5 g

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An astronaut at rest in space with mass 84 kg fires a thruster that expels 35 g of hot gas at 875 m/s. What is the velocity of the astronaut after firing the thruster?.

Answers

Answer:

  about 0.365 m/s

Explanation:

You want to know the velocity of an astronaut who starts from rest and fires a thruster that expels 35 g of gas at 875 m/s.

Momentum

The total momentum of the system is the same before and after the thruster is fired: 0.

If v is the velocity of the astronaut, it must satisfy the equation ...

  (84)v +(0.035)(875) = 0

  v = -(0.035)(875)/(84) ≈ -0.3646

The velocity of the astronaut is about 0.365 m/s in the direction opposite of the expelled gas.

__

Additional comment

We have used (kg·m/s) as the units of momentum. 35 g = 0.035 kg. We have also assumed that the mass of the system before firing is a total of 84.035 kg

Which of the following is a metric unit of measure that measures length and distance?a.) Footb.) Areac.) Meterd.) Yard

Answers

Meter is a metric unit of measure that measures length and distance because area is not any of the measurement unit.

We always measure the physical properties of a thing using particular units. For example, the unit for measuring your bodyʼs mass is the pound and the unit for measuring your height is inches. But, of course, itʼs not as simple as that. If you use the metric system you measure your mass in kilograms, not pounds, and you measure your height in centimeters.

And even if you measure your height in inches, you are probably mix two different units: feet and inches. Although we can measure the mass and lengths of the devices and we deal with in computer architecture, we are typically more interested in a third property.

Time (measurement unit: the second) and the related properties of period and its reciprocal, frequency. Furthermore, computers manipulate physical representations of information, which has its own measurement unit.

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A wire ring of internal radius
3cm and external radius 3.2 cm is
rested on the surface of a liquid and
then raised. An extra pulling force
equivalent to the weight of 3.03g is
required before the film breaks than it
is after. Calculate the surface tension
of the liquid.

Answers

The surface tension of the liquid is 24.1 g/m.

How do you determine the surface tension of the liquid?

To determine the surface tension of the liquid, employ the formula:

surface tension = (extra force required) / (length of the film)

extra force required = 3.03 g

internal radius = 3 cm = 0.03 m

external radius = 3.2 cm = 0.032 m

The length of the film can be calculated as the circumference of the external ring minus the circumference of the internal ring:

length of the film = (2 * pi * external radius) - (2 * pi * internal radius)

= (2 * pi * 0.032 m) - (2 * pi * 0.03 m)

= 0.1257 m

Hence, the surface tension can be determined following our chosing formula:

surface tension = (3.03 g) / (0.1257 m)

= 24.1 g/m

It can then be concluded that the surface tension of the liquid is 24.1 g/m.

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What is the relationship between current and resistance across a circuit?
O joint variation
O inversely proportional
O no relationship
O directly proportional

Answers

Answer: The relationship between current, voltage and resistance is expressed by Ohm's Law. This states that the current flowing in a circuit is directly proportional to the applied voltage and inversely proportional to the resistance of the circuit, provided the temperature remains constant.

Explanation:

What is the net torque on the pulley about the axle?

Answers

τnet = (TL ‐ TR)R is the needed net torque just on pulley about the axle.

How do pulleys work?

A flexible line, cord, rope, chain, or belt is fastened to the rim of a wheel termed as a pulley. To transport motion and energy, pulleys may be employed singly or in combination.

If TL and TR are really the stresses pulling there at left and the sides of the pulleys, respectively, the net torque here on pulley would then be defined as net = (TL - TR)R, in which R represents the radius of pulley (see Fig. 1). It is believed that positive torque moves in a clockwise direction.

This means that  τnet = (TL ‐ TR)R is the necessary formula for net torque.

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Need help asap !!!!!!!!!!!!?!!!!?

Answers

Answer: A, B, and C

Explanation: A standard room-vacuuming robot doesn't unpack itself from the box it comes in.

Jamie finds the height of a classroom by dropping a penny from the ceiling. It takes 0.8 seconds to hit the ground. How tall are the ceilings?

Answers

Answer:

The height of the classroom can be determined using the equation:

height = (1/2) * g * t^2

Where:

g = the acceleration due to gravity (approximately 9.8 m/s^2 on Earth)

t = the time it takes for the penny to fall (0.8 seconds)

Plugging in the known values, we get:

height = (1/2) * 9.8 m/s^2 * (0.8 s)^2

height = 3.072 m

So the ceilings are approximately 3.072 meters tall.

Explanation:

Is cycling up a hill kinetic energy?

Answers

Yes, cycling up a hill is kinetic energy.

Kinetic energy refers to the energy of motion, which is observable as the movement of an object. Every move has kinetic energy. For instance, cycling up a hill can convert up to 90% of an individual's energy and movement into kinetic energy. The kinetic energy produced is then used to move the cycle up to the hill. Momentum, along with the balance of the rider, helps keep the cycle stable while traveling along the path up to the hill.

Therefore, it is concluded that cycling up a hill is kinetic energy.

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A baseball diamond is a square with sides of 90 feet. What is the shortest distance.

Answers

The shortest distant will be the diagonal of the square. The value of the diagonal of the square is 127.3 feet.

How to find the diagonal value?

Square is a figure with a four sides that has the same value for each. The formula for its diagonal is sides√2. As per given sides is 90 feet. The calculation will be:

Diagonal = sides√2

Diagonal = 90√2

Diagonal = 90 x 1.41421356237

Diagonal = 127.279220613

Let round the value. So, the diagonal = 127.3 feet. You can also determine diagonal value from phytagoras theory by dividing the square into 4 triangle then calculate the diagonal.

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a cinder block is sitting on a platform 20 m high. It weighs 7.9kg the block has energy calculate it

Answers

The energy that an item retains due to its position in relation to other objects, internal tensions, electric charge, or other reasons is known as potential energy in physics.

What is a potential energy?

Although it has connections to the Greek philosopher Aristotle's concept of potentiality, the phrase "potential energy" was coined by the Scottish engineer and physicist William Rankine in the 19th century. Potential energy is connected to forces that affect a body in such a way that their combined work is only dependent on the body's beginning and ultimate positions in space. At any point in space, these forces, also known as conservative forces, can be represented by vectors that are gradients of a particular scalar function known as potential.

The block has potential energy due to its position above the ground. The formula for potential energy is PE = mgh, where m is the mass of the object (7.9 kg), g is the acceleration due to gravity (approximately 9.8 m/s^2), and h is the height above the ground (20 m).

So the potential energy of the cinder block is:

PE = (7.9 kg) x (9.8 m/s^2) x (20 m) = 1564 Joules

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a. What is the momentum of an 8-kg bowling ball rolling at 2 m/s?
b. If the bowling ball rolls into a pillow and stops in 0.5 s, calculate the average force it exerts on the pillow.
c. What average force does the pillow exert on
the ball?

Answers

Answer:

a. 16 kg m/s

b. -32 N (Newton)

c. 32 N

Explanation:

a. The momentum of an object is the product of its mass and velocity. The formula for momentum is: momentum = mass x velocity

So, in the case of an 8-kg bowling ball rolling at 2 m/s, the momentum would be: momentum = 8 kg x 2 m/s

= 16 kg m/s

The unit of momentum is kg m/s (kilogram meter per second). The momentum of this bowling ball is 16 kg m/s. It is important to note that the direction of velocity is also important when calculating momentum, so it is important to know the direction of the bowling ball.

b. To calculate the average force that the bowling ball exerts on the pillow, we can use the equation: force = change in momentum / change in time

The change in momentum is equal to the final momentum minus the initial momentum. Since the bowling ball is rolling at 2 m/s and stops in 0.5s, we can assume that its final momentum is 0 (since it stops moving) and the initial momentum is 16 kg m/s.

change in momentum = final momentum - initial momentum

= 0 - 16 kg m/s

= -16 kg m/s

change in time = 0.5s

So,

force = -16 kg m/s / 0.5 s

= -32 N (Newton)

The negative sign indicates that the force is opposite to the direction of motion of the bowling ball. This is expected as the force exerted by the pillow is acting in the opposite direction of the ball's motion, thus slowing it down and bringing it to a stop.

It is important to note that the force exerted by the pillow on the bowling ball is equal and opposite to the force exerted by the bowling ball on the pillow, this is Newton's third law of motion.

c. The average force that the pillow exerts on the ball is equal and opposite to the average force that the ball exerts on the pillow, as stated by Newton's third law of motion. This is because when the ball collides with the pillow, the pillow exerts an equal and opposite force on the ball to stop its motion. Therefore, the average force that the pillow exerts on the ball is 32 N, in the opposite direction of the ball's motion.

Which of the following is not true about a longitudinal wave?

A (They are all considered mechanical waves.

B (They need a medium (material) in order to travel.

C (They move up and down (perpendicular) to the direction of the wave's energy.

D (They move along with (parallel to) the direction of the wave's energy.

Answers

Answer:

Which of the following is NOT TRUE about a longitudinal wave?

A. They are all considered mechanical waves.B. They need a medium (material) in order to travel.C. They move up and down (perpendicular) to the direction of the wave's energy.D. They move along with (parallel to) the direction of the wave's energy.

Explanation:

What are waves?A wave is a disturbance in a medium that carries energy without permanently moving a substance. Particles of the medium are momentarily displaced and then return to their original location in a wave.Mechanical waves are waves that require a medium to transport energy from one location to another. Mediums are materials that move energy or light from one substance or location to another. Answer breakdownsChoice C is the best answer. In a transverse wave, particles of the medium are displaced in a direction that is perpendicular to the direction of energy transport.Choice D is incorrect. This choice describes exactly what a longitudinal wave is. In a longitudinal wave, particles of the medium are displaced in a direction that is parallel to the direction of the wave's energy. Choice A is incorrect. A mechanical wave is any wave that requires a medium to transport energy from one location to another. Choice B is incorrect. As per choice A's explanation, if the longitudinal waves are mechanical they must then require a medium.

Two carts with masses of 4.0 kg and 3.3 kg move toward each other on a
frictionless track with speeds of 5.9 m/s and 4.6 m/s, respectively. The carts stick
together after colliding head-on. Find their final speed. Answer in units of m/s.

Answers

Crash of two vehicles that are moving directly toward each other

What is the final speed?

This is a difficulty with momentum conservation. Each cart has a starting momentum equal to its mass multiplied by its velocity. When they hit and stick together, they become a single unit of combined mass of 4 kg + 5 kg, and their new velocity must account for momentum conservation.

Assume the 4 kilogram cart is coming from the left and the 5 kg cart is coming from the right. This results in a velocity of +12 m/s for the 4 kg cart and a velocity of -9 m/s for the 5 weight cart.

The carts’ early moments are

(4 kg * 12 m/s) = 48 kg * m/s

And

-45 (kg * m)/s = (5 kg * -9 m/s)

This results in a total starting momentum of 48 + (-45) = 3 (kg * m)/s.

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convert the following measurement
0.0088(g/cm^3)=_____ kg/m^3

Answers

Answer:

0.00088 kg/m³

Explanation:

Given:

[tex] \displaystyle{ \dfrac{8.8 \times {10}^{ - 3} \: \text{g} }{ \text{cm}^{3} }}[/tex]

Let's consider cm³ to m³ first. We know that m³ is 100 cm³. Therefore, cm³ would equal to m³ × 10 negative squared:

[tex] \displaystyle{ \dfrac{8.8 \times {10}^{ - 3} \: \text{g} }{ {10}^{ - 2} \: \text{m}^{3} }}[/tex]

And from the numerator, 1 kg = 10³ grams. Therefore, 1 gram would equal 10 to negative cube kg Hence:

[tex] \displaystyle{ \dfrac{8.8 \times {10}^{ - 3} \times {10}^{ - 3} \: \text{kg} }{ {10}^{ - 2} \: \text{m}^{3} }}[/tex]

Then evaluate using law of exponent where if same bases multiply each other, we add the exponents:

[tex] \displaystyle{ \dfrac{8.8 \times {10}^{ - 3 - 3} \: \text{kg} }{ {10}^{ - 2} \: \text{m}^{3} }} \\ \\ \displaystyle{ \dfrac{8.8 \times {10}^{ - 6} \: \text{kg} }{ {10}^{ - 2} \: \text{m}^{3} }} \\ \\ \displaystyle{ \dfrac{8.8 \times {10}^{ - 6 + 2} \: \text{kg} }{ \: \text{m}^{3} }} \\ \\ \displaystyle{ \dfrac{8.8 \times {10}^{ - 4} \: \text{kg} }{ \: \text{m}^{3} }}[/tex]

And 8.8 × 10^-4 is equal to 0.00088. Therefore, the answer is 0.00088 kg/m³

Based on your data, is the relationship between friction and speed direct (both go up), or indirect (one decreases and the other increases)? Explain how your data support this answer.

Answers

they both go up depending on the circumstances

Which explains how lightning is formed?
A two objects with the same electric charge rub together
B electrons flow through a conductor
C raindrops conduct electricity from clouds to the ground
D two objects with different electric charges rub together

Answers

The lightning is formed by  two objects with different electric charges rub together Hence, option (D) is correct.

What is lightning?

Charges created by rubbing can be used to explain lightning. The water droplets flow downhill during a thunderstorm while the air currents rise higher.

As a result of this process, the positive charges gather close to the cloud's upper edge, while the negative charges gather close to the cloud's lower edge and also close to the ground.

The charge's magnitude increases significantly as it builds up. Airborne water droplets serve as a conductor for this charge.

Lightning and thunder are produced when these charges flow to meet.

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Answer: C raindrops conduct electricity from clouds to the ground

Explanation:

The color of light emitted is determined by the amount of energy released by the atom when electrons within it relax.

Answers

Answer:

As electrons move from higher energy levels to lower energy levels a photon (particle of light) will be given off. This is the process of emission.

Explanation:

electrons and photons also do this

two astronauts are pushing a satellite in space. astronaut 1 is pushing with 42 N positive on the x axis, astronaut 2 is pushing a force 15º above the positive y axis. what force is astronaut two pushing with

Answers

The force with which the second astronaut is pushing is 11.25 N in the problem given.

What is the force of the second astronaut?

We have to note that force is a vector and because that force is a vector, we know that the direction of the force that has been applied is also very important.

As we know, it is clear that;

Force of an astronaut Fₓ = 42 N

Angle θ = 15º

Then we can write that;

F = 42 tan 15

= 11.25 N

Thus, the force that acts as the second astronaut is pushing is about 11.25 N.

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10 - 4 (3-2y) = 8y -5 if there are 10 birds for 4 dogs,what is the ratio of birds to dogs? !!!!!!!PLEASE HELP QUICK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ILL GIVE U BRAINLIEST IF CORRECT!!!!!!!!!!!!!Why is the case of Marbury v. Madison significant? (3 points)Select one:a. It was the last time that the U.S. Supreme Court ruled a law unconstitutional.b. It was the case that ended segregation in the United States.c. It was the case that started segregation in the United States.d. It was the first time that the U.S. Supreme Court ruled a law unconstitutional. A. 6.2 cm2B. 12.4 cm2C. 3.1 cm2D. 9.4 cm2please answer!! will give brainliest! Please help me I really need it 3. PART B: Which TWO phrases from the text bestsupport the answers to Part A?A.) "Throughout history, however, many Americancitizens have not been allowed to vote in local andnational elections... Cultural and political barriersprevented racial minorities from heading to thevoting booth..." ( Paragraph 5)B.) "Wallace refused, so Johnson took charge ofAlabama's National Guard and sent one thousandmilitary policemen and two thousand army troopsto escort protesters on a march from Selma toMontgomery, Alabama." ( Paragraph 6)C.) "Proponents of the Voting Rights Act wantedeveryone to be able to vote, and wanted everyone'svote to matter equally." ( Paragraph 7)D.) "The Voting Rights Act of 1965 had immediatepositive effects for minority voters. Nearly 250,000black citizens registered to vote in 1965 alone." (Paragraph 8)E.) "A majority of the justices believed it was wrong torequire certain states to check with the federalgovernment every time they changed their votinglaws." ( Paragraph 9)F.) "Technically, Congress can still override individualchanges as they arise, but critics are skeptical thatCongress will actually do this." ( Paragraph 11) Read these paragraphs and answer the question that follows:In 2008, more than one million American students gave nearly 20 million service hours to their communities. They made a difference in people's lives and learned some important life lessons in the process. Organizations, including schools, are actively promoting service for all citizens as a way to be involved, help others, and improve themselves.Service is helping other people and being active in your community. For example, one group of teens planted a community garden with their friends. They grow a variety of vegetables. The garden requires regular care. The teens donate the produce to a local soup kitchen. Workers there use the produce to help feed people in the community. By tending the garden and donating their produce, the teens are actively helping make life a bit better for others in their community.Service is valuable in ways that cannot be measured in dollars. People volunteer or serve others without expecting money or gifts in return. Service is not about earning money. It is not just collecting money to give to a group. It is about action and contributing to the common good. The people who serve as well as those who receive help benefit in many ways that are more important than money or gifts. For example, a soup kitchen provides essential food to people who may otherwise go hungry. The soup kitchen is extremely valuable for those struggling to get enough to eat. Those serving learn about compassion and how helping others can improve life for all.Millions of Americans are making society better for themselves and for others. They are participating citizens in their community, raising up those who are less fortunate. In return, they become better people who can understand the perspectives and needs of others, which are invaluable and important qualities of good citizens.Which sentence begins the introduction of this article excerpt? (5 points)Question 4 options:1) Service is valuable in ways that cannot be measured in dollars.2) Service is helping other people and being active in your community.3) Millions of Americans are making society better for themselves and for others.4) In 2008, more than one million American students gave nearly 20 million service hours to their communities. Anyone is available to help please? Rewrite this division expression a an equivalent multiplication expression: 5/8 divided by 2/3 Please help me Im not very smart lol um help asap now....... La fiesta_______(empezar) a las tres esta tarde. * Define each word :Impeachments are Enumeration Corruption of Blood is Writ of Habeas Corpus is a Ex post facto is a lawPopular sovereigntyEnumerated powersConcurrent powersDue ProcessNaturalization need help , ill give a brainlist to the best answer which of the following scentences shows the correct use of a transition word ? do you believe that men and women have perform specific roles? There are 6 balls. Half of the balls are blue. One ball is red. The rest are green. Write the fraction for the green balls. HELP ASAP...Just tap the photo to read the problem Which of the following was an effect of Rome's removal of the property requirement for joining the army? Slaves revolted and demanded their freedom. > O Wealthy citizens gained more power in the Senate. Poor Romans rioted and began farming public lands. Soldiers became more loyal to their general than to Rome. 25 pts D Question 2 have you done working with your digital creation How does the gametophyte generation differ genetically from the sporophyte generation?It contains a full set of genetic material (is diploid).It undergoes asexual reproduction.It lacks genetic material (DNA).It contains half the genetic material (is haploid).