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Nutka1998 [239]
3 years ago
9

A group of students use a scale to measure the mass of an object. Which of the following would be the appropriate base unit of m

easurement to use: a meter b Liter c gram d Newton e none of these
Physics
1 answer:
MissTica3 years ago
4 0

Answer:

c Gram

Explanation:

Mass is an intrinsec property of every object; it is somehow a measure of the "amount of matter" contained in the object.

The SI units of the mass is the kilogram (kg), where one of the sub-multiple of the kilogram is the gram (g). For measuring small objects, therefore, the gram is the appropriate unit.

The other units are wrong because:

- The meter is the unit of measure of the length

- The liter is a unit of measure for the volume

- Newton is the unit of measure for the force

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3. How long will it take a ball to reach the ground if it falls from a cliff 25 m tall (starting from rest)? What if the ball we
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Answer:

2.26 s

Explanation:

Let's take down to be positive.

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If the ball instead had an initial horizontal velocity of 5 m/s, its initial vertical velocity is still 0 m/s.  So the time to fall is still 2.26 s.

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The average period of pendulum clock is found to be 1.2s at sea level. The period of the same pendulum on a mountain top is foun
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Answer:

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Explanation:

In order to calculate the acceleration due to gravity at the top of the mountain, you first calculate the length of the pendulum, by using the information about the period at the sea level.

You use the following formula:

T=2\pi \sqrt{\frac{l}{g}}         (1)

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You solve for l in the equation (1):

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g': acceleration due to gravity at the top of the mountain

T': new period of the pendulum

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The acceleration due to gravity at the top of the mountain is 10.12m/s^2

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