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3 years ago

Which of the following statements is true?

Physics

2 answers:

azamat3 years ago

7 0

Answer:

Water vapor helps keep the earth's heat from escaping into space.

Explanation:

Of all the options only the first option is correct. Yes, the water vapor helps keep the Earth's heat from escaping into the space. Water vapor is green house gas meaning it has the ability to absorb heating coming from the sun. Among the rest options sublimation is process of conversion of solid directly into the gas. Most of the water vapor in the air does not come from the transpiration and evaporation from the oceans add salt water to the atmosphere is absolutely wrong.

belka [17]3 years ago

6 0

The first option is true, water vapor helps keep the Earth's heat from escaping into space.

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Explanation:

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3 years ago

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The line-emission spectrum of an atom is caused by the energies released when electrons

Paul [167]

Answer:

makes a transition from a high to a lower energy state

Explanation:

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4 years ago

A toy car runs off the edge of a table that is 2.225 m high. If the car lands 0.400 m away from the base of the table, how fast

ruslelena [56]

Answer:

0.594 m/s

Explanation:

First, find the time it takes to land.

Given, in the y direction:

Δy = 2.225 m

v₀ = 0 m/s

a = 9.8 m/s²

Find: t

Δy = v₀ t + ½ at²

(2.225 m) = (0 m/s) t + ½ (9.8 m/s²) t²

t = 0.674 s

Next, find the horizontal velocity.

Given, in the x direction:

Δx = 0.400 m

a = 0 m/s²

t = 0.674 s

Find: v₀

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(0.400 m) = v₀ (0.674 s) + ½ (0 m/s²) (0.674 s)²

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8 0

3 years ago

You are a nurse in a hospital. You are told to move a patient through three corridors each measuring 14.33 meters. Because of fr

dimulka [17.4K]

Work done by force is given by formula

$W = F.d$

now here work done against friction is given so force of friction here is

$F_f = 848 N$

It moved by three corridors with each measures

$d = 14.33 m$

so total distance will be

$s = 14.33 \times 3 = 43 m$

now from above formula of work done we will say

$W = 848 \times 43$

$W = 36464 J$

so above is the work done to move three corridors

3 0

3 years ago