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Kruka [31]
3 years ago
13

In which situation does the law of conservation of momentum apply?

Physics
1 answer:
zvonat [6]3 years ago
7 0

As per Newton's II law we know that

F = \frac{dP}{dt}

rate of change in momentum is Net outside force on the object

now here we will have if net outside force will be zero

then we can say

F = 0 = \frac{dP}{dt}

so from above equation we can say

dP = 0

and hence we have

P = constant

so the correct answer will be

<em>3.) in the absence of outside forces</em>

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What do we call the quantity of matter that an object contains?
german

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2 years ago
An airplane flew from San Francisco to Washington, D.C. Approximately
Arada [10]

Answer:

The solution is given below:

Explanation:

The computation of the speed is shown below

As we know that

Speed = distance ÷ time

where

distance is 2000 km

And, the time is 2.5 hours

SO, the speed is

= 2,000 ÷ 2.5

= 800 km/h

Now the distance would be the same i.e. 2,000 km

but the time is 2 hours

So, the speed is

= 2,000 km ÷ 2 hours

= 1,000 km/hr

The direction should be opposite to the first airplane

5 0
2 years ago
9. Does a blackbody radiator emit light waves? Explain.
Yakvenalex [24]

Answer:

"A blackbody is an object that absorbs all of the radiation that it receives(that is,it does not reflect any light,nor does it allow any light to pass through it and out the other side).The energy that the blackbody absorbs heats it up,and then it will emit its own radiation."

Explanation:

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4 0
2 years ago
Two balloons are charged with an identical quantity and type of charge: -6.25 x 10-6 C. They are held apart at a separation dist
steposvetlana [31]

Answer:

The electric force between them is 878.9 N

Explanation:

Given:

Identical charge q = -6.25 \times 10^{-6}C

Separation between two charges r = 0.02 m

For finding the electrical force,

According to the coulomb's law

   F = \frac{k q^{2} }{r^{2} }

Here, force between two balloons are repulsive because both charges are same.

Where k = 9 \times 10^{9}

   F = \frac{9 \times 10^{9} \times (-6.25 \times 10^{-6} )^{2}  }{4 \times 10^{-4} }

   F = 878.9 N

Therefore, the electric force between them is 878.9 N

8 0
3 years ago
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