Answer:
35.14 m/s
Explanation:
The Law of Conservation of Momentum states that the momentum before and after a collision is the same.
m₁ v₁ + m₂ v₂ = m₁ v₁ + m₂ v₂Let's set the ball to have the subscript of 1 and the man to have the subscript of 2.
The initial and final mass of the ball is the same, so m₁ = 7.00 kg on both sides of the equation.
The initial velocity of the ball, v₁ on the left side of the equation, is the unknown variable we are trying to find.
The initial and final mass of the man is the same, so m₂ = 75.0 kg on both sides of the equation.
The man starts at rest, meaning that his initial velocity is v₂ = 0 m/s on the left side of the equation.
The final velocity of both the ball and the man is 3.00 m/s, so we can set v₁ and v₂ on the right side of the equation to equal 3.00 m/s.
Left side of the equation:
m₁ = 7.00 kg v₁ = ?m₂ = 75.0 kgv₂ = 0 m/sRight side of the equation:
m₁ = 7.00 kg v₁ = 3.00 m/sm₂ = 75.0 kgv₂ = 3.00 m/sSubstitute these values into the Law of Conversation of Momentum formula.
(7.00) v₁ + (75.0)(0) = (7.00)(3.00) + (75.0)(3.00)Multiply and simplify.
7.00 v₁ = 21 + 225 7 v₁ = 246Divide both sides of the equation by 7.
v₁ = 35.14 m/sThe ball needs to be moving at a speed of 35.14 m/s in order to send the man off at a speed of 3.00 m/s.
List the types of electromagnetic radiation in order from lowest energy photons to highest energy photons.
radio waves,X-rays,
Explanation:
In order from highest to lowest energy, the sections of the EM spectrum are named: gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves. Microwaves (like the ones used in microwave ovens) are a subsection of the radio wave segment of the EM spectrum.
this is the measured value (always positive) from one point to another
Answer:
Distance.
Explanation:
Motion can be defined as a change in the location (position) of a physical object or body with respect to a reference point i.e the amount of distance covered by the physical object.
This ultimately implies that, motion would occur as a result of a change in location (position) of an object with respect to a reference point or frame of reference i.e where it was standing before the effect of an external force.
Mathematically, the motion of an object is described in terms of acceleration, time, distance, speed, velocity, displacement, position, etc.
Hence, distance is the measured value (always positive) from one point to another.
Mathematically, distance is given by the formula;
Distance = speed * time
Also, the S.I unit for measuring the distance covered by a physical object is meters.
Enter a range of values for x.
a
a
3x-90 930
26
27
Answer:
32[tex]3x - 9 + 93 = 180 \\ 3x + 84 = 180 \\ 3x = 180 - 84 \\ = 96 \\ x = \frac{96}{3} \\ x = 32[/tex]
Answer:
the answer is 3 and 34 i just took the quiz
Please hurry please
What is the height of the counter where a 4 kg fruit basket sits that has 30 J of gravitational potential energy? h= GPE/am
Answer:
0.765m
Explanation:
gravitational potential energy GPE = mass * acceleration due to gravity * height
Given
GPE = 30Joules
Mass m = 4kg
acceleration = 9.8m/s²
Required
Height h
From the formula
h = GPE/mg
h = 30/4(9.8)
h = 30/39.2
h = 0.765m\
Hence the height of the counter is 0.765m
A WAY TO ACHIVE A STABLE CONFIGURATION IS BY ELECTRON TRANSFER. WHICH TYPE OF BOND IS IT?
Answer:
Explanation:
Covalent bonds share electrons
A weight of 4.0 N is used to extend a spring. The extension of the spring is 0.06 m. (i) Calculate the spring constant, k, of the spring.
(ii) State what measurements should be made to determine the extension of the spring produced by the 4.0 N weight.
Answer:
See explanation
Explanation:
Hookes law states that; the displacement due to a stretching force is directly proportional to the magnitude of the deforming force.
F = ke
F = deforming force
k = force constant
e = extention
k = F/e
k = 4N/0.06 m= 66.67 Nm^-1
To determine the extension of the spring produced by the 4.0 N weight
1) We measure the original length of the spring
2) We measure the length after hanging the 4 N mass
3) Subtract the new length from the original length to determine the extention.
Which statement best compares a scientific theory and an opinion?
O A. Neither an opinion nor a scientific theory can ever be changed.
O B. An opinion is supported by evidence, while a scientific theory often is not supported by evidence.
OC. A scientific theory is supported by evidence, while an opinion often is not supported by evidence.
OD A scientific theory can never be changed, while an opinion can change in many ways.
Im
Answer: c opinion is something ppl just suggest but a theory needs proof before it is confirmed
PLS ANSWER FAST WILL GIVE BRAINLEST !!!
Calculate the missing variables using the necessary formula and rules using "FORCE"
How much force is needed to accelerate a 2000 kg car by 3 m/ s2
Answer:
F = 6,000 N
Explanation:
F = m × a
F = 2,000 × 3
F = 6,000 kg m/s²
F = 6,000 N
Which compound contains only covalent bonds CH3OH Ca(OH)2 Ba(OH)2 NaOH
Answer: CH3OH
Explanation:
One Newton is equivalent to
A. 1 kg/s2
B. 1 kg*m/s
C. 1 kg*m/s2
D. 1 kg/s
Answer:
B
Explanation:
Why does the time for 20 complete oscillations need to be taken in the pendulum oscillation experiment?
Answer:
In order to minimize the uncertainty in the period, we measured the time for the pendulum to make 20 oscillations, and divided that time by 20
Explanation:
(Conservation of Momentum)
Consider a 2,000 kg car traveling 10 m/s toward another car.After the two cars collide, they couple together and move along at 6 m/s. What is the mass of the second car?
Can someone please solve and explain,I don’t understand:/
Answer:
I haven't learnt physics at all yet but I'll try.
After the two cars collide, they move at 6 m/s.
This tells us that the 2nd car which collided with the first car which is 2000 kg is much heavier than the 1st one, if the second one was lighter, the two cars coupled together speed would be much more than just 6 m/s.
Refer to explanation for working.
Explanation:
Now find out how much g or kg is the 2nd car more than the 1st.
2000 ÷ 10 = 200 (I don't really know how to explain this part)
10 - 6 = 4 (Difference for 1st car average speed per second and the coupled cars average speed per second)
200 x 4 = 800
2000 + 800 = 2800 kg
(Final answer)
Shine the flashlight on the liquid crystal sheet. Did you observe evidence that light carries energy?
Answer:
no i did not observe anything
Explanation:
Do different types of electromagnetic waves travel at different speeds?
No.
Radio, TV, microwave, heat, red, yellow, blue, tanning rays, X-rays, and gamma rays all travel at the same speed. It's called the "speed of light".
(As long as they're all traveling through the same stuff.)
Rhyolite forms as lava cools very quickly, forming holes.
Sometimes gems can form within the holes. The image
shows fire opal within rhyolite.
Which type of rock is rhyolite?
A. Intrusive igneous
B. Extrusive igneous
C. Metamorphic
D. Sedimentary
PREVIOUS
Answer:
B. Extrusive igneous
Explanation:
Its B
Our Solar System What is the region that is located between Mars and Jupiter and is labeled A in the illustration? Solar System A
A. The terrestrial belt
B. The comet belt
C. The asteroid belt
D. The Kuiper belt
Answer:
asteroid belt
Explanation:
The asteroid belt is a torus-shaped region in the Solar System, located roughly between the orbits of the planets Jupiter and Mars, that is occupied by a great many solid, irregularly shaped bodies, of many sizes but much smaller than planets, called asteroids or minor planets.
According to the article, why might acting happy actually make one happy?
Answer: mirror neurons are the reason people usually reflect the behavior of those around them and have been linked to the ability to empathize. People are attracted to happy people because it seems to boost our mood.
Explanation:
Answer:
Some psychologists think that you can trick your brain into feeling happy by acting happy. Acting happy might actually make one happy by mirror neurons. This is the reason people usually reflect the behavior of those around them and have been linked to the ability to empathize. People are attracted to happy people because it seems to boost our mood. The three components of emotion are cognitive, physiological, and behavioral. There is actually some scientific evidence to suggest that smiling, even when you are not feeling happy, can make you happy. This idea is called the facial feedback hypothesis. Happiness, and smiling, can also be contagious and make others around them want to smile. People often mimic the facial expressions of others.
Explanation:
100% on Edge 2023!! You're welcome :) :) :) :)
If 59.1 g of pure metal uses 890.9 j of energy to heat it from 26.1 c to 59.6 c, identify the metal
Answer: The metal is iron.
Explanation:
We have 59.1 grams of a given metal.
We need 890.9 joules of energy to heat the metal from 26.1°C to 59.6°C
First, we need to see the net increase in temperature, which is equal to the difference between the final temperature and the initial temperature.
ΔT = 59.6°C - 26.1°C = 33.5°C
Now we can find the specific heat, which is calculated as:
c = Ε/(ΔT*m)
Where:
E = energy given to the material = 890.9 J
m = mass of the material = 59.1 gr
ΔT = change in temperature = 33.5°C
Replacing these in the above equation we get:
c = 890.9 J/(33.5°C*59.1 gr) = 0.45 J/(gr*°C)
Now we need to look at a table of specific heats and see which metal has this specific heat.
We can see that iron is the best match, so we can assume that the metal is iron.
A car travels 500m in 20 seconds. What is its speed?
sentence answers please
Answer:
Distance traveled by car =500m
Time taken =20s
Speed = distance/time = 500/20=25m/s
I Hope its help for you
Have a good day
A man pushes against a tree with a force of 10 newtons (N). The tree does not move. What is the amount of force exerted
by the tree on the man?
ON
BSN
10 N
20 N
Answer:
10 N
Explanation:
Given that,
A man pushes against a tree with a force of 10 newtons.
We need to find the amount of force exerted by the tree on the man.
The force exerted by the tree on the man will be equal to the force that the man exert on the tree as per Newton's third law of motion.
It means the tree exert 10 N force on the man. Hence, the correct option is (c) i.e. 10 N.
What are the important points to remember while constructing an electric
circuit?
Explanation:
There are four fundamental elements of an electrical circuit, irrespective of where or even how positive or negative it is: a power source, a resistor, an electric generator or unit, and at most one regulator or switch.
Please find the density of question 4,6 and 10!Be sure to show all steps!Thank you!
Answer:
Explanation:
4. Density of water = 1.01g/ml
6: Mass of silver = 892.5g
8: Mass of 157.8g I gave the answer as mass, even though it asked for weight.
Which part of the following graph shows the object going at the fastest speed?
Distance
5
4-
in km
2-
1-
A А
0
6 5 10 15 20 25 30 35 40 45
Time in minutes
O Ato B
B to C
C to D
A to B and C to D are going equal speeds
Answer:
more point plzzzzz... eeeeeeeee
A to B in the graph shows the object going at the fastest speed.
In a distance-time graph, the gradient of the line is equal to the speed of the object. The greater the gradient (and the steeper the line) the faster the object is moving.
What is speed ?"The rate of change of position of an object in any direction. Speed is measured as the ratio of distance to the time in which the distance was covered. Speed is a scalar quantity as it has only direction and no magnitude."
Know more about speed here
https://brainly.com/question/7359669?
#SPJ2
A gas cylinder has a volume of 0.4 m? It contains butane at a pressure of 100 kPa and a temperature of
20°C. What pressure is needed to compress the gas to a volume of 0.05 m² at the same temperature?
The pressure needed : 800 kPa
Further explanationGiven
V₁ = 0.4 m³
P₁ = 100 kPa
T₁ = 20 + 273 = 293 K
V₂ = 0.05 m³
T₂ = T₁ = 293 K
Required
The final pressure(P₂)
Solution
Boyle's Law
At a fixed temperature, the gas volume is inversely proportional to the pressure applied
[tex]\tt \rm p_1V_1=p_2.V_2\\\\\dfrac{p_1}{p_2}=\dfrac{V_2}{V_1}[/tex]
Input the value :
P₂=P₁V₁/V₂
P₂=100 x 0.4 / 0.05
P₂=800 kPa
A train leaves the station heading north on the tracks. It completes the entire 60 mile trip in one hour. Calculate the train's average speed and velocity over the one hour trip. Show your work.
Answer:
I don't know if it's scalar or vector
How much power is developed in a car that can pull a 5000 N at a constant speed
of 20 m/s?
Answer:
YAYA MAN
Explanation:
A boy on a bicycle drags a wagon full of newspapers at 0.800 m/s for 30.0 min using a
force of 40.0 N. How much work has the boy done?
Answer:
=57600joules
Explanation:
Given data
Velocity =0.8m/s
Time = 30*60=1800 seconds
Distance =Velocity x time
Distance =0.8*1800
Distance =1440m
Work done = force x distance
Work done =40*1440
Work done =57600joules
Hence the work Done is 57600joules
A bicycle is 10 m from a wall traveling at a rate of 4 m/s. How far from the wall will it be if it accelerates at a rate of 12 (m/s)/s for 8 seconds
The bicycle is a distance x away from the wall at time t according to
x = 10 m + (4 m/s) t + 1/2 (12 m/s²) t ²
so that after t = 8 s, it will be
x = 10 m + (4 m/s) (8 s) + 1/2 (12 m/s²) (8 s)² = 426 m
away from the wall.
How much power is required to carry a 35 N package a vertical distance of 18 m if the work on the package is accomplished in 30 s?
Answer:
P = 21 watts
Explanation:
Given that,
Weight of a package, F = 35 N
Distance, d = 18 m
Time, t = 30 s
We need to find the power required to carry the package. Power is equal to the work done divided by time. So,
[tex]P=\dfrac{W}{t}\\\\P=\dfrac{Fd}{t}\\\\P=\dfrac{35\times 18}{30}\\\\P=21\ W[/tex]
So, the required power is 21 watts.
Agustin visits Panama City, Florida, during the month of May. He feels a shore breeze blowing from theocean onto the beach. What causes this shore breeze? SC.6.E.7.5
A.The ocean is colder than the land.
B.The land is colder than the ocean.
C.The ocean is denser than the land.
D.The land is denser than the ocean.
Answer: A.The ocean is colder than the land
Explanation:
Based on the information provided in the question, we are informed that Agustin visits Panama City, Florida, during the month of May and that he feels a shore breeze blowing from the ocean onto the beach.
The reason for the shore breeze is simply due to the fact that the ocean is colder than the land. Since the ocean is colder, anyone who goes to the beach will feel the breeze.