a heat engine does 20.0 jj of work and exhausts 20.0 jj of waste heat during each cycle.What is the engine's thermal efficiency? If the cold-reservoir temperature is 20.0 degree C, what is the minimum possible temperature in degree C of the hot reservoir?

40 m/s

We have the equation of motion v^2-u^2= 2as ------------- ( i)

where v = final velocity which is unknown let it be x m/s

u = initial velocity which is 0 m/s ...( The body starts from rest )

a = Acceleration gained by body = 8 m/s^2

s stands for distance covered in till v velocity which is 100 meters.

So by using equation( i)

So the velocity of the body will be 40 m/s when it had a covered distance of 100 meters.

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Thus, g = GPE / (m*h) = 3 / (4*4) = 0.75 m/s2. Therefore, the gravitational field strength experienced by the object is 0.75 m/s2.

What is gravitational field strength?

Gravitational field strength is a measure of the gravitational force per unit mass at a given location in space.It is typically measured in Newtons per kilogram (N/kg) or meters per second squared (m/s2). Gravitational field strength is an important concept in understanding the effects of gravity on objects and how it affects their behavior.

It is represented by the symbol g and is calculated by dividing the gravitational force by the mass of an object. It is typically measured in units of meters per second squared (m/s2).

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Answer:

3

Explanation:

seems more reasonable because of the fact that the other moon is on the other gravitational pull because of the outer ring and are the exact opposite sides

Answer:

100 N

Explanation:

For ONE bullet ( .025 kg)

 fired to 1000 m/s   in  .25 s   ( four per second)

     acceleration = 1000 m/s   /  .25 s = 4000 m/s^2

then F = ma

           = .025 kg * 4000 m/s^2 = 100 N

Deoxyribonucleic acid (DNA) is the nucleic acid that carries genetic information in the human body.

Deoxyribonucleic acid or DNA is the molecule that carries the genetic information for the development and functioning of an organism in the human body. DNA is made of two connected strands that wind around each other to resemble a twisted ladder -a shape referred to as a double helix. Thus, DNA is the nucleic acid that performs the function of carrying genetic information that is to be transferred from one generation to the next generation.

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The momentum of an isolated system before and after a collision must equal each other, according to the law of conservation of momentum.

The only thing that happens when two bodies collide is that their momentum changes. Thus, for bodies colliding, changes in momentum are always equal and opposite. The momentum of the other body must decrease by the same amount if the momentum of the first body increases. As a result, momentum always remains constant.

Regardless of the type of collision, momentum is always conserved. Although mass is conserved regardless of the type of collision, an inelastic collision may cause the mass to deform, leading to the two possibilities.

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Answer: 12,100 Joules of Kinetic Energy

Explanation:

Kinetic energy is a measure of how much energy something has because it's moving. To calculate the kinetic energy of a bike, you need to know how heavy it is and how fast it's going. We use a formula that looks like this:

(1/2) x the weight of the bike (in kilograms) x the speed of the bike (in meters per second) x the speed of the bike (in meters per second)

So if we have a bike that weighs 25 kilograms and is going 22 meters per second, we can plug those numbers into the formula like this:

(1/2) x 25 x 22 x 22

And we find out that the bike has 12,100 Joules of kinetic energy.

a) The relative atomic mass is 122.35 amu

b) The Rutherford model introduced the planetary model

c) The percentage abundance shows how much of that mass is present.

We have to know that as what we need here is the relative atomic mass of the element X then we must have to be able to look at the weighted average of all the isotopes that have been shown to belong to the element that is in question called X.

Thus we would have;

(121 * 0.432) + (123 * 0.531) + (129 * 0.037)

= 52.27 + 65.31 + 4.773

= 122.35 amu

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The ball continues to fall, its kinetic energy will increase.

Kinetic energy is the energy an object possesses due to its motion. It is the energy associated with an object’s speed and mass, and is the energy that an object has because of its movement. Kinetic energy can be converted into other forms of energy, such as heat, light, or sound. It can also be used to do work, such as moving objects or powering machines. Kinetic energy is a form of mechanical energy, which is energy that is associated with the motion or position of an object. Kinetic energy is related to the work done on an object, and it increases as the object’s speed increases. Kinetic energy can be calculated using the formula KE = ½mv2, where m is the mass of the object and v is the velocity of the object.

The kinetic energy of the ball will increase as it falls, because it is gaining speed due to gravity.
As it falls, it accelerates at a rate of 9.8 m/s^2, and its kinetic energy is equal to its mass multiplied by the square of its velocity.
Therefore, as the ball continues to fall, its kinetic energy will increase.

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Answer:

Magnetic energy can be transformed into kinetic energy in a variety of ways.

Explanation:

One way that this occurs is through electromagnetic induction. This occurs when a changing magnetic field induces an electric current in a conductor, such as a wire. This induced current creates a force that can move the conductor, thus transforming the magnetic energy into kinetic energy. This process is used in electric generators, which convert the kinetic energy of a turbine into electrical energy by turning a coil of wire inside a magnetic field.

Another way that magnetic energy can be transformed into kinetic energy is through the operation of an electric motor. An electric motor uses the interaction between a magnetic field and an electric current to create a force that can rotate a shaft, thus transforming the electrical energy into kinetic energy. Electric motors are used in a wide range of applications, including transportation, manufacturing, and household appliances.

Magnetic energy can also be transformed into kinetic energy through magnetohydrodynamics (MHD), which involves the interaction of a fluid with a magnetic field. When a fluid such as a gas or liquid moves through a magnetic field, it can generate a force that can propel the fluid, thus transforming the magnetic energy into kinetic energy. This process is used in some forms of propulsion, including maglev trains and MHD generators.

In summary, magnetic energy can be transformed into kinetic energy through the interaction of a magnetic field with a conductor, an electric current, or a fluid, which creates a force that can move an object, thus transforming the magnetic energy into kinetic energy.

The expansion of the universe does not affect the relative position of astronomical bodies within galaxies.

The universe is described as all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.

We know for a fact that the universe is expanding, but this does not alter the distance between the earth and the sun. It also does not have a bearing from the distance between atoms.

The expansion of the universe is known to be partly caused by the Big Bang, and partly caused by dark energy.

The stars are more or less static relative to a spacetime fabric that is itself expanding, hence the expansion should not be thought of as stars flying away from each other in a static spacetime fabric.

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Answer:

The relative location of astronomical bodies within galaxies is unaffected by the expansion of the universe. True, the cosmos is expanding, but this has no effect on the distance between the Earth and the Sun.

Explanation:

A protective device such as an egg carton, foam padding, or bubble wrap can be used to minimize the magnitude of the net force acting on an egg in a cart during a collision by providing cushioning some of the impact.

What is magnitude?
Magnitude refers to the size or scale of an object, event, or phenomenon. It is typically used to describe the intensity or amplitude of a physical quantity, such as the strength of an earthquake or the brightness of a star. Magnitude is also used to quantify the size of a population, the severity of an economic downturn, or the power of a political movement. Magnitude is usually expressed as a numerical value, such as a number on a Richter scale or a magnitude rating on a star catalog. Magnitude can also be expressed in terms of a relative or subjective scale, such as a rating of “strong” or “weak” for an earthquake. Magnitude is often used in scientific research to quantify the size of a phenomenon, such as the magnitude of climate change or the magnitude of a new medical breakthrough.

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Answer:  38000N

Explanation:

Movement -> inertia -> force -> rate of change of momentum

Momentum = mv

                   = mass x velocity

                   = 2000 x 19

                   = 38000N

Answer:

38,000 kg·m/s

Explanation:

Did you mean "momentum"?  If so, here is the solution:

Momentum = p = mv = (2000 kg)(19 m/s) = 38,000 kg·m/s

The mistake that Kamala made from the table is that Gamma rays should have a very high frequency, not a very low frequency.

The grouping of electromagnetic radiations in the electromagnetic spectrum is done according to diminishing or increasing frequency or wavelength.

The following are some examples of electromagnetic radiations depending on increasing wavelength:

These are the radiation waves produced by the radioactive disintegration of atomic nuclei.

These rays have high frequencies. The frequency happens 1019 times every second.

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Answer:  gamma rays should have a very high frequency, not a very low frequency.

Explanation:

x component = 10 Cos 120° = -5

y component = 10 Sin 120° = 5√3

In vector algebra, vectors are added, subtracted, and multiplied using vector components. On diagrams, vectors are typically indicated by an arrow. The direction and magnitude of the vector are shown by the tip of the arrow and its length, respectively.

The use of vector components enables us to split a single vector quantity into two (or more) simpler scalar quantities. In vector algebra, vectors are added, subtracted, and multiplied using vector components.

Another method for locating vector components is to use the angle measured in the opposite direction from the +x axis. Then, the x-component will always be cosθ and the y-component will always be sinθ. Hence, the x component will be -5, and the y component will be 5√3.

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Answer:

Range formula:

R = V^2 sin 2θ / g

sin 2θ = R g / V^2 = 80 m * 9.80 m/s^2 / (30 m/s)^2 = .871

2θ = 60.6 deg

θ = 30.3 deg

Check:     30 * cos 30.3 = 25.9 m/s       horizontal speed

t = 80 m / 25.9 m/s = 3.08 sec        to reach target

H = Vy0 t - 1/2 g t^2

Vy0 = 30 * sin 30.3 = 15.1 m/s     initial vertical speed

H = 15.1 * 3.08 - 4.9 * 3.08^2 = 46.5 - 46.5 = 0    

Ball will be back at starting height after 3.08 s

Answer: The difference in charge between two places is known as voltage. The passage of charge is measured as current. A material's propensity to oppose the passage of charge is known as resistance (current).

Explanation:

See Ohm's Law in which it describes the connection between current, voltage, and resistance. This asserts that, given the temperature is constant, the current flowing in a circuit is directly proportional to the applied voltage and inversely proportional to the circuit resistance. According to Ohm's Law, current is exactly proportional to voltage I = v/r).

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Velocity with which the object hits the ground will be  22.3 m/sec.

Velocity is the rate of change of distance with respect to time.

According to the third equation of motion, it relates final velocity with the initial velocity and acceleration

Mathematically, v² = u² + 2as

s = 25 m

a = g = acceleration due to gravity because the object is falling towards the ground = 9.8 m/sec²

u = initial velocity = 0 m/s

v = final velocity = which is to be calculated

v² = u² + 2as

v² = 0 + 2 x 10 x 25

v² = 500

v = [tex]\sqrt{500}\\[/tex]

v = 22.3 m/sec

Velocity of the object will be 22.3 m/sec when it will hit the ground.

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Answer: 1200m

Explanation:

The velocity of the smaller marble after collision is -0.33 m/s.

Velocity is the rate of change of displacement.

To calculate the velocity of the smaller marble after collision, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values inton equation 1

Hence, the smaller marble take off at -0.33 m/s.

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The specific heat capacity of the substance is 444 J/kg.°C.

The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K (or 1 °C).

To calculate the specific heat capacity of the substance, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the specific heat capacity is 444 J/kg.°C.

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The formula for calculating magnitude is  |v| =√(x2 + y2)

A vector formula's magnitude can be used to condense the numerical value of a particular vector. A vector has a magnitude and a direction. This magnitude of a vector formula provides a summary of the individual vector measurements along the x, y, and z axes. The symbol for it is |v|.

|v| =(x2 + y2) is the formula to calculate the magnitude of a vector (in two dimensions) v = (x, y). The Pythagorean theorem serves as the basis for this formula.

|V| = (x2 + y2 + z2) is the formula to calculate the magnitude of a vector (in three-dimensional space) V = (x, y, z).

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When three objects with a mass of M exert gravitation forces on each other, the direction of the net force on mass B will vary according to position of three masses.

The force of attraction between any two bodies is known as gravitation. There is an attraction between every thing in the cosmos, but most of the time it is too faint to be noticed due to the extreme distance between the objects.

Along the line connecting the centers of the two bodies, the gravitational force acts. Hence,  the direction of the net force on mass B will vary according to position of three masses.

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Lupus is a kind of disease in which the bodies immune system attacks its own cells.

We know that the immune system is the system that is in the body that is able to fight off the invaders that come into the body. As such, the immune system is the system that attacks any disease causing organism that comes into the body.

We know that foreign cells can be able to cause diseases in the body and they can be able to affect the balance of the cells that are in the body. Now, we can see that there are some circumstances in which the cells of the body begins to fight themselves.

This implies that the immune system of the body sees its own cells as the enemies and then begins to attack them and as such the person that has this condition is said to have an auto immune disorder.

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The wind on Jupiter planet can blow up to 1,500 miles per hour.

A planet is a large celestial body that orbits a star, usually a sun, and has its own gravity. Planets are classified by size, composition, and distance from the star. They are made up of rock, metal, or gas and can contain an atmosphere. Planets can have satellites, or moons, which orbit them. They can also have asteroids, comets, and other objects around them. Some planets have rings, like Saturn, and some have many moons, like Jupiter. Planets are fascinating to study and explore.

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The gravitational potential energy of the bowling ball is 7,056 J.

The gravitational potential energy of the bowling ball is calculated by applying the following formula;

P.E = mgh

where;

P.E = ( 6kg x 9.8 m/s² x 120 m )

P.E = 7,056 J

Thus, the gravitational potential energy of the bowling ball is the energy possessed by the ball due to its height above the ground level.

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Disadvantages of renewable energy

Renewable energy has many benefits, but it’s not always sunny when it comes to renewable energy. Here are some cons of renewable energy when compared to traditional fuel sources:

The increasing use of energy sources makes people to find other options than the current energy sources. The types of renewable energy are as follows.

This type of energy comes from the process of capturing solar radiation or sunlight, then converting it into electricity, heat, or hot water. To get electricity, the sun's heat will be absorbed using solar panels (solar panels) and then convert it into electricity.

Wind is moving air. Wind has long been used as a source of energy. For example in the Netherlands, the wind is used to drive a pinwheel. This kincie serves as a source of grain processing equipment. Currently, electricity is also able to generate electricity by utilizing turbines. This turbine is used to drive a generator that generates electricity.

This energy is obtained from the results of the tides. It is known, this type of energy is also used on the east coast of America and Europe. The turbines installed on the waterfront help convert energy from the tides into mechanical energy to grind grain.

This type of energy is used to generate electricity. It's just that developing wave energy requires infrastructure with a relatively high cost.

Sea water has a temperature difference where the inside of the sea water feels cold and the surface of the sea water feels hot because it is exposed to sunlight. This temperature difference is used to generate electrical energy using advanced technology.

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Answer:

You need to plug in the values

(C) 100(-1/2)^0 = 100

100(-1/2) = -50

100(-1/2)^2 = -25

100(-1/2)^3 = 100 * -1/8 = -12.5