3 years ago

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Physics

1 answer:

True [87]3 years ago

8 0

Answer:

the answer is b

Explanation:

gravity pulls you down so on a scale you will weigh more. less gravity you will weigh less.

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An axe used to split wood is driven into a piece of wood for an input distance of 0.03. If the mechanical advantage of the axe i

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3 years ago

A machine exerts a 100 N force to the right over a 5.00 meter length in 4.00 seconds. Calculate the power output of this machine

bixtya [17]

125 W is the power output of this machine.

Answer:

Explanation:

Power is defined as the amount of work done on the system to move that system from its original state within the given time interval. So it can be determined by the ratio of work done with time interval. As work done is the measure of force required to move a system to a certain distance. Work done is calculated as product of force with displacement.

So in the present case, the force is given as 100 N, the displacement is given as 5 m and the time is given as 4 s, then power is

$Power = \frac{Work done}{Time}$

As Work done = Force acting on the machine × Displacement

So $Power = \frac{(Force * Displacement)}{Time}$

Power = $\frac{(100*5)}{4}$ =125 W

So, 125 W is the power output of this machine.

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3 years ago

Which statement best explains how density changes when a liquid becomes a gas

rusak2 [61]

Answer:

c. density decreases because the molecules move farther apart

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As a liquid is heated, the molecules move faster and move farther apart. This causes the volume to increase, which causes the density to decrease.

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3 years ago

A child lifts a 5.0-newton toy to a height of 0.50 meters. How much work is done on the toy?

natali 33 [55]

Work done=mgh
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W=2.5joule

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I think the model being described is the Rutherford atom model. This is where he posit that atoms have a nucleus which contains positively charged protons and surrounded by electrons.

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PLEASE HELPPPPPP <333​

PLEASE HELPPPPPP <333