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Helga [31]
3 years ago
12

A rifle with a longer barrel can fire bullets with a larger velocity than a rifle with a shorter barrel. a) Explain this using t

he impulse-momentum theorem. b) Explain this using the work-energy theorem
Physics
1 answer:
n200080 [17]3 years ago
6 0
 Its mainly about how much gunpowder is used in the shell. Thats all I got. XD
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Part III: If a mouse and an elephant both run with the same kinetic energy, can you say which is running faster? Use the space b
Verdich [7]

Answer:

The mouse runs faster to have the same kinetic energy as the elephant.

Explanation:

Note from the equation given, mass (m) is directly proportional to KE. This means an elephant with more mass will have more KE, therefore, for the mouse to compensate, it has to run faster because its KE is smaller because of its small mass. If both run at the same speed, the elephant would have thousands of times more kinetic energy than the mouse. So the mouse has to run faster so that its speed compansates for its smaller weight.

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Gekata [30.6K]

Answer:

A.

Explanation:

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sergiy2304 [10]

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The cue exerts force onto the white ball which pushes the blue ball into the direction of the hole.
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2 years ago
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A load of 1 kW takes a current of 5 A from a 230 V supply. Calculate the power factor.
Pachacha [2.7K]

Answer:

Power factor = 0.87 (Approx)

Explanation:

Given:

Load = 1 Kw = 1000 watt

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Computation:

Power factor = watts / (V)(I)

Power factor = 1,000 / (230)(5)

Power factor = 1,000 / (1,150)

Power factor = 0.8695

Power factor = 0.87 (Approx)

6 0
3 years ago
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