3 years ago

Which of these best describe the chemical composition of asteroids? Select all that apply.

Physics

1 answer:

romanna [79]3 years ago

3 0

Hydrogen because it's a chemical

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Radar is used to determine distances to various objects by measuring the round-trip time for an echo from the object. (a) How fa

zloy xaker [14]

Answer:

150000000000 m

0.0000005 seconds

33.33 ns

Explanation:

Speed of electromagnetic waves through vacuum = $3\times 10^8\ m/s$

Echo time = 1000 seconds

Echo time is the time taken to reach the object and come back to the observer

Distance = Speed×Time

$Distance=3\times 10^8\times \frac{1000}{2}=150000000000\ m$

Venus is 150000000000 m away from Earth

Time = Distance / Speed

$Time=\frac{75}{3\times 10^8}=0.00000025\ seconds$

Echo time will be twice the time

$Echo\ time=2\times 0.00000025=0.0000005\ seconds$

The echo time will be 0.0000005 seconds

Difference in time = Difference in distance / Speed

$\Delta t=\frac{\Delta d}{v}\\\Rightarrow \Delta t=\frac{10}{3\times 10^8}\\\Rightarrow \Delta=33.33\ ns$

The accuracy by which I will be able to measure the echo time is 33.33 ns

5 0

4 years ago

If one object is 103 km away and a second object is 106 km away, one could say that the second object is _____ times further awa

vaieri [72.5K]

Answer:

$1.03$

Explanation:

$\frac{object_{second}}{object_{first}} = \frac{106}{103} = 1.02912621359$

Round to three significant digits

$1.03$

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4 years ago

Please answer the following question!

Semmy [17]

Answer:

Explanation:

the momentum will always be 0 when it is at rest because the object isnt moving!

Hope this helped!

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2 years ago

If a sound wave travels through air at a speed of 345 m/s, what would be the frequency of a 0.80 m long wave?

den301095 [7]

Answer:

Explanation:431.3

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3 years ago

How does the ocean influence global climate?

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By absorbing solar radiation and releasing heat needed to drive the atmospheric circulation

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4 years ago