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aleksandr82 [10.1K]
2 years ago
6

Heres some earned points

Physics
2 answers:
irina1246 [14]2 years ago
6 0

Answer:

wait again? okay well how was ur day?

Explanation:

egoroff_w [7]2 years ago
5 0

Answer:

what do you mean by that.

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Why does a purple flower appear purple when white light shines on it?
grandymaker [24]
The flower absorbs all light but purple, making it appear, purple!
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2 years ago
For a body falling freely from rest​ (disregarding air​ resistance), the distance the body falls varies directly as the square o
jasenka [17]

Answer:

The answer to the question is

The object would fall 57.625 m in the first 5 seconds

Explanation:

To solve the question, we note that

the height of fall = 490 ft = ‪149.352‬ m

Time to touch the ground = 7 seconds

We are required to find out how far the object falls in the first 5 seconds

We apply the relation

S = u·t + 0.5×g·t ² = We then have

‪149.352‬ = U×7+0.5*9.81*49 From where u = -13 m/s

Therefore to find how far it falls in the first 5 seconds, we have

-13*5 + 0.5*9.81*25 = 57.625 m

5 0
3 years ago
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Gravity has traditionally been defined as a force of attraction between things that have what
ludmilkaskok [199]

Answer:

mass

Explanation:

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3 years ago
Why is it okay to have a radioactive alpha source in a smoke detector in your house?
egoroff_w [7]
When smoke particles pass between the source of radiation and the detector the drop in radiation will be sufficient to tigger the alarm. <span />
5 0
3 years ago
The principle of work states that the ratio of work output to work input is always
snow_lady [41]

Answer:

work output is always less than work input - the ratio is less than 1.

Explanation:

This principle comes from the fact that a machine or system cannot produce more work than is supplied to it, because this would violate the energy conservation law (work is a type of mechanical energy).

In theoretical machines called "ideal machines" the input work is the same as the output work, but these machines are only theoretical because in real applications there is always some type of energy loss, either in heat produced by a machine or processes for its operation, for this reason the output work is always less than the input work.

Regarding the ratio work output to work input:

\frac{WO}{WI} < 1

because work input WI is always greater than work output WO.

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3 years ago
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