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3 years ago

Explain why Earth does not have as many craters as Mars, Mercury, and the Moon.

Physics

1 answer:

Lilit [14]3 years ago

3 0

Answer:

The reason is mainly because Earth has an atmosphere.

Explanation:

We don't see as many craters in our planet as most of them have been eroded away by wind, water, volcanic activity or any other forces. Earth is also surrounded by an atmosphere which other planets like Mars, Mercury and the Moon lacks. The atmosphere reduces the impact of meteoroids when they hit the surface of a planet as the atmosphere disintegrates them into smaller particles. Also, the atmosphere creates a planet's own weather condition, no atmosphere means no weather. So, planets like Mars, Mercury where there is no atmosphere, there is no weather to erode away the craters. Hence, most of them are still visible on their surfaces.

You might be interested in

What is the all time speed record for completing the iditarod?.

shtirl [24]

<h3>Question:</h3>

•What is the all time speed record for completing the iditarod?

Answer:

•In 2016, Dallas broke his own record, finishing in 8 days, 11 hours, 20 minutes and 16 seconds. In 2017, Mitch Seavey broke all previous records by finishing in 8 days, 3 hours, 40 minutes and 13 seconds, which currently stands as the fastest winning time for the Iditarod.

Explanation:

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3 0

2 years ago

Suppose that, while lying on a beach near the equator watching the Sun set over a calm ocean, you start a stopwatch just as the

Yuri [45]

Ans: Let d is the distance from height to our eyes.

<span>Applying the Pythagoras theorem, we get,</span>

<span>Check image: </span>

7 0

3 years ago

How you do this resistor in circuit question?

lawyer [7]

If Resistors are in series= The equivalent is the sum.

E.g R1 and R2 in series, R = R1 + R2.

If in Parallel, equivalent is Product/sum.

E.g If R1 and R2 in parallel, R = (R1*R2)/(R1+R2)

1.) 60 is parallel with 40 and both are then in series with 20.

60//40 = (60*40)/(60+40) = 2400/100 = 24

Now the 24 is in series with the 20

R = 24 + 20 = 44 ohms.

2.) 80 is in series with 40 and both are then in parallel with 40.

Solving the series, R = 80 + 40 =120.

Parallel: 120//40 = (120*40)/(120+40) = 4800/160 = 30
Equivalent Resistance = 30 ohms.

3.) 100 is in parallel with 100 and both are then in series with the parallel of 50 and 50.

The 1st parallel = (100*100)/(100+100) = 10000/200 = 50

The 2nd parallel = (50*50)/(50+50) = 2500/100 = 25.

Solving the series = 50 + 25 =75 ohms.

Cheers.

3 0

3 years ago

How fast and in what direction must galaxy A be moving 17 an absorption Line found at 500 nm for a stationary galaxy 1s shifted

emmainna [20.7K]

Answer:

v = 0.22 c and wavelength is decrease so galaxy A is move away from stationary galaxy

v = 0.095 c and wavelength is increase so galaxy B come toward stationary galaxy

Explanation:

Given data

found = 500 nm

shifted A = 400 nm

shifted B = 550 nm

to find out

How fast and in what direction is galaxy

solution

we use here formula that is

(λ) shifted = √(1-β / 1+β) (λ)found

1-β / 1+β = (4/5)² ..................1

1-β / 1+β = 16 / 25

β = 0.22

v/c = 0.22

v = 0.22 c

here wavelength is decrease so galaxy A is move away from stationary galaxy

and

here according to equation 1

and we use shifted 550 nm

1-β / 1+β = (5.5/5)²

1-β / 1+β = 30.25 / 25

β = 0.095

so v/c = 0.095

v = 0.095 c

here wavelength is increase so galaxy B come toward stationary galaxy

3 0

3 years ago

a resistance of 30 ohms is placed in a circuit with 90 volt battery what current flow in the circuit

mamaluj [8]

Answer:

3amps

Explanation:

voltage v = current I × resistance R

current = voltage÷ resistance = 90÷30= 3amperes

4 0

3 years ago