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2 years ago

Questions:(a) Why should the amplitude of oscillation be small on a pendulum experiment

1 answer:

5 0

The formula for the pendulum experiment is based on the assumption that the amplitude is small so that the angle is approximately equal to the Sine of the angle.

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Answer:

Explanation:

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2 years ago

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3 years ago

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A radioactive polonium sample has a half-life of 103 years. How much of a 100 g sample would remain after 412 years?

Anna [14]

Answer:

6.25 g

Explanation:

The half-life of a radioactive isotope is the time needed for the mass of the sample to halve.

Here, we a radioactive polonium sample, whose half-life is

$\tau_{1/2} = 103 y$

The mass of sample left after a time t is given by the equation

$m(t) = m_0 (\frac{1}{2})^{t/t_{1/2})$

where

$m_0 = 100 g$ is the initial mass

$\tau_{1/2} = 103 y$ is the half-life

If we substitute t = 412 y , we find the mass of sample left:

$m(t) = (100 g) (\frac{1}{2})^{412 y/103 y}=(100 g)(\frac{1}{2})^{1/4}=6.25 g$

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2 years ago

What is the kinetic energy of a 144.1 kg man running along at 3.44 m/s?

Novay_Z [31]

The equation of kinetic energy is $K = \frac{1}{2} * mv^2$ , where v = velocity and m= mass.

So,

144.1 kg * 11.56 m/s * 1/2 = 832.898

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3 years ago

Rachel is wearing roller skates and is standing next to a wall. She pushes off from the wall and then glides to a stop. Plan an

xxMikexx [17]

Answer:

The correct option is;

Rachael's motion energy is being turned into other types pf energy

Explanation:

Here we have Rachael pushing off from the wall to generate motion energy. The motion energy makes Rachael glide such that she is displaced while at the same time she overcomes resistances to the motion, (rolling) of the tires from the ground as well as generates some audible noise and heat. These are all forms of energy that takes up the initial motion energy that Rachael had.

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3 years ago

Questions:(a) Why should the amplitude of oscillation be small on a pendulum experiment​

Questions:(a) Why should the amplitude of oscillation be small on a pendulum experiment