3 years ago

Does sound travel much faster than light ?

Physics

1 answer:

Kitty [74]3 years ago

4 0

Answer:

nothing travels faster than light

Example:

You’ll always see lightning before you hear it, because typically lightning will be a mile away, two miles away.

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If your prediction turns out to be false your experiment has been a failure

nikdorinn [45]

This is false. Your hypothesis, or prediction, is just that: a prediction. Saying its a failure will result in bias.

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An automobile having a mass of 1,000 kg is driven into a brick wall in a safety test. The bumper behaves like a spring with cons

vlada-n [284]

Answer:

$v=2.02\frac{m}{s}$

Explanation:

Assuming no energy lost, according to the law of conservation of energy, the kinetic energy of the automobile becomes potential energy after the crash:

$K=U\\\frac{mv^2}{2}=\frac{kx^2}{2}$

Here m is the automobile's mass, v is the speed of the car before impact, k is the "bumper" constant and x is the compression of the bumper due to the collision. Solving for v:

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A person carries a plank of wood 2 m long with one hand pushing down on it at one end with a force F1 and the other hand holding

sveta [45]

Answer:

F1= 588 N

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Explanation:

Please see the attached file.

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Calculate the moment of Inertia for a ring with a mass 0.715 kg, an inner radius of 10.7 cm and an outer radius of 12.7 cm.

lisov135 [29]

Using formula:
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<span>I=0.5*0.715kg*[(12.7cm)^2+(10.7cm)^2] </span>

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A bullet whose mass is 30.2 g leaves a rifle with a muzzle velocity of 1,000 m/s. It strikes a block of wood (mass 5 kg), initia

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This problem here is an example of inelastic collision where kinetic energy is not conserved but momentum is. We calculate as follows:

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