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3 years ago

100 newtons 5 seconds how do you find the momentum

1 answer:

3 0

F = ma = m dv/dt

F dt = m dv

integrate both sides ( assuming constant force , mass) , zero inital conditions

Ft = mv

mv = P

P = Ft = 5 * 100 = 500 N.s

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A soldier fires a gun and another boy at a distance of 1020 m hears the sound of firing the gun 33 seconds after seeing its smok

Komok [63]

Answer:

Speed of sound is 30.91m/s

Explanation:

Speed is given by:

Speed = distance travelled / time taken

Given:

Distance travelled = 1020m

Time taken = 33seconds

Speed = 1020m/33s

Speed = 30.91m/s

6 0

3 years ago

Read 2 more answers

Considering the various theories, the energy used in forming organic molecules in the primitive atmosphere could have come from

OLEGan [10]

Answer:

<h2>e. sound. </h2>

Explanation:

Such type of atmosphere in which oxygen was not present or was present in little amount is known as the primitive atmosphere and such type of atmosphere was present in the initial stage of the earth formation.
During this period, water vapor, nitrogen, hydrogen and carbon dioxide gases were present.
These gases interact with the help of energy that comes from many sources such as lightning, ultraviolet radiation, electric spark and some other.
When these inorganic molecules react in the then the formation of organic compounds takes place that becomes the basis of the organization of the life on the earth and called an organic evolution of life.

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3 years ago

What process is this?

a_sh-v [17]

^they’re correct! it is weathering, i just took a test with that answer:)

4 0

3 years ago

Two colorless solutions are mixed together. Bubbles form as the solution is stirred. Give two possible explanations for this res

iVinArrow [24]

One explanation could be there was a chemical change which would create bubbles
Or they could be reacting to whatever it’s being stirred with
(Sorry of this doesn’t help much but the first one is definitely a possible answer!!)

6 0

4 years ago

5.) Scott pushes a piano along a slope and has an initial velocity of 10.0 m/s [up]. Its acceleration is 2.0 m/s2 [down].

forsale [732]

Answer:

a) 6m/s, 0m/s, -6m/s

b) 16m, 25m, 16m

Explanation:

For the first part of the problem, use the Kinematic Equation for Final Velocity:

You are looking for the final velocities of the times: 2s, 5s, and 8s (plug those in for t). We also know that the acceleration is going down so it is negative (-2 is plugged in for a). 10 is the initial velocity and it is positive.

For the second part of the problem, use the Kinematic Equation for Displacement:

You are looking for the displacement of the piano at times: 2s, 5s, and 8s (plug in and square at t). Again, the acceleration is negative because it is in the direction of down, so plug -2 in for a. The initial velocity is positive 10. Plugging those numbers in for each variable should get the correct answer.

Hopefully this helped, I went on here in search of an answer and found it out myself and since no one has answered it yet, I'll help someone else out.

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3 years ago