What is absolute zero

1 answer:

5 0

An absolute zero is when all forms of being cease to move due to low to none existing thermal energy between all living things. It follows the statement of Kelvin’s temperature scale where the temperature is -275.15K or -546.3°C.

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Any clue on this one

aniked [119]

3rd one I believe so

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Julli [10]

I can't see the answers clearly, but I can see the question. So, I'll just give you a clue/hint.

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3 years ago

#86 can an object be moving when its acceleration is zero? can an object be accelerating when its speed is zero?

liraira [26]

Yes, an object that was set in motion in the past by some force, but that is no longer being acted on by a net force, is moving but with zero acceleration, i.e. it is moving at constant velocity.

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3 years ago

A box of books weighing 325N moves at a constant velocity across the floor when the box is pushed with a force of 425 N exerted

iragen [17]

Answer:The coefficient of kinetic friction is 0.61

Explanation:A state of constant velocity connotes an acceleration equal to zero {this is evident from Acceleration=(final velocity-initial velocity)/time}

Consequently,a balanced forces system is attained

Force of pulling

F(x)=F×cosα=425N×0.817=347N

is equivalent to the resistance force.

F=U(k)×(Fw+Fsinα)=U(k)×(325N+425N×0,576)=U(k)×570N

Note; U(k) is the coefficient of kinetic friction

Equating the two force components,

The coefficient of static friction ×570N= 347N

The coefficient of static friction = 347N/570N

The coefficient of static friction =0.61

Please note that the coefficient of static friction is dimensionless .

This is as a result of the same unit of forces whose division resulted in the determination of the coefficient of kinetic friction.

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3 years ago

Practically all clouds and storms occur in this layer of the atmosphere.

Nadya [2.5K]

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3 years ago