Acceleration is measured in_________ m g m/s m/s2

Why does air pressure decrease with increasing altitude?

Grace [21]

Answer:
The weight of the air above is smaller

Explanation:

As altitude increases, the amount of gas molecules in the air decreases. The air becomes less dense than air nearer to sea level. This is what people mean by “thin air”. Thin air exerts less pressure than air at a lower altitude.

6 0

2 years ago

Problem 21-40a:

Greeley [361]

Answer:

Part a)

$\frac{F_e}{F_g} = 2.74 \times 10^{12}$

Part b)

$q = 3.37 \times 10^{-4} C$

Explanation:

As we know that electric force on electric charge is given as

$F = qE$

here we have

$q = 1.6 \times 10^{-19}C$

E = 153 N/C

now force is given as

$F = (1.6 \times 10^{-19})(153) = 2.45 \times 10^{-17} N$

Gravitational force on electric charge near surface of earth is given as

$F_g = mg$

$F_g = (9.1 \times 10^{-31})(9.81) = 8.93 \times 10^[-30} N$

now the ratio of two forces is given as

$\frac{F_e}{F_g} = \frac{2.45 \times 10^{-17}}{8.93 \times 10^{-30}}$

$\frac{F_e}{F_g} = 2.74 \times 10^{12}$

Part b)

Now the ball is balanced by the electric force and the force of gravity on it

so here we have

$F_g = qE$

$mg = qE$

$(5.25 \times 10^{-3})(9.81) = q(153)$

here we have

$q = 3.37 \times 10^{-4} C$

8 0

4 years ago

Which model could represent a neutral atom of oxygen? A. 2 B. 4 C. 3 D. 1

Sergeu [11.5K]

Answer: D. 1

Explanation:

Choice 1 could represent a neutral atom of oxygen

4 0

3 years ago

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Lithium has an atomic number of 3. How many electrons does it have?

Sedaia [141]

Answer:

it has 3 electrons. brainliest please

4 0

3 years ago

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Two illustrations of transverse waves. The one with shorter crests is labeled A. The wave with taller crests is labeled B. Which

suter [353]

The largest distance moved by a particle of a vibrating body from its equilibrium position is called amplitude. Wave B has higher energy because wave it has a higher amplitude.

<h3>What is the amplitude of a wave?</h3>

The largest distance moved by the particles on either side of the mean position is the amplitude of a wave.

The maximum height of either crest or trough from its equilibrium position is called amplitude.

Hence Wave B has higher energy because it has a higher amplitude.

To learn more about the amplitude of a wave refer to the link;

brainly.com/question/9351212

7 0

2 years ago

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