3 years ago

The law of conservation of mass states that mass can never be created or destroyed, only changed. true or faulse

Physics

1 answer:

Aleksandr-060686 [28]3 years ago

7 0

Answer:

true

Explanation:

The law of conservation of mass states that in a chemical reaction mass is neither created nor destroyed. For example, the carbon atom in coal becomes carbon dioxide when it is burned. The carbon atom changes from a solid structure to a gas but its mass does not change.

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When an object is lifted 12 meters off the ground, it gains a certain amount of potential energy. If the same object is lifted 2

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I think the answer is twice as much

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Calculate the accleration of a car if its velocity increases from 15m/s to 75m/s in 5 second

andrezito [222]

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A certain frictionless simple pendulum having a length l and mass m swings with period t. If both l and m are doubled, what is t

iVinArrow [24]

If l and m both are doubled then the period becomes √2*T

what is a simple pendulum?

It is the one which can be considered to be a point mass suspended from a string or rod of negligible mass.

A pendulum is a weight suspended from a pivot so that it can swing freely.

Here,

A certain frictionless simple pendulum having a length l and mass m

mass of pendulum = m

length of the pendulum = l

The period of simple pendulum is:

$T = 2\pi \sqrt{\frac{l}{g} }$

Where k is the constant.

Now the length and mass are doubled,

m' = 2m

l' = 2l

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$T' = \sqrt{2}* 2\pi \sqrt{\frac{l}{g} }$

$T' = \sqrt{2} * T$

Hence,

If l and m both are doubled then the period becomes √2*T

Learn more about Simple Harmonic Motion here:

<u>brainly.com/question/17315536</u>

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2 years ago

What is the difference between speed and velocity?

mixer [17]

Speed is the rate of change of distance with time while velocity is the rate of change of displacement with time.
Speed is a scalar quantity while velocity is a vector quantity.
Speed cannot be negative but velocity can be negative.

Hope you could get an idea from here.

Doubt clarification - use comment section.

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Answer:

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Explanation:

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