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qwelly [4]
3 years ago
7

A copper wire has a mass of 29.33 mg/cm and has a length of 2.5 cm.

Physics
1 answer:
77julia77 [94]3 years ago
3 0
The correct answer 73.325 mg
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An observer on Earth sees rocket 1 leave Earth and travel toward Planet X at 0.3c. The observer on Earth also sees that Planet X
Verizon [17]

Answer:

0.625 c

Explanation:

Relative speed of a body may be defined as the speed of one body with respect to some other or the speed of one body in comparison to the speed of second body.

In the context,

The relative speed of body 2 with respect to body 1 can be expressed as :

$u'=\frac{u-v}{1-\frac{uv}{c^2}}$

Speed of rocket 1 with respect to rocket 2 :

$u' = \frac{0.4 c- (-0.3 c)}{1-\frac{(0.4 c)(-0.3 c)}{c^2}}$

$u' = \frac{0.7 c}{1.12}$

u'=0.625 c

Therefore, the speed of rocket 1 according to an observer on rocket 2 is 0.625 c

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3 years ago
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Answer:

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4 0
3 years ago
A soccer ball takes 20 s to roll 10 m. What is the average speed of the soccer ball.
Georgia [21]

Explanation:

velocity is distance divided by time.

so

the average speed of the ball is 10m/20s

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8 0
2 years ago
What are the units of measure for distance?
olga2289 [7]
The most common unit is meters (m for short). It is the base unit for distance or displacement in the metric system. If you are dealing with larger distances, you might use kilometers (I'm for short) which is just 1000 meters. On the other hand, centimeter (cm) are used for small distances and are 1/100 of a meter. Another common unit is millimeters (mm) which is 1/1000 of a meter.
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What are the stages of agriculture
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Answer:

do you mean stages or branches

7 0
3 years ago
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