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pentagon [3]
3 years ago
15

The story of space exploration began with unmanned exploration, moved into a period of manned exploration, and now appears

Physics
1 answer:
slega [8]3 years ago
8 0

Answer:

1) D. appears to be moving back toward unmanned exploration in the form of deep-space satellite exploration.

2) D. Mars

3) C. other planets and moons in the solar system and beyond

4) A. lifeforms

5) A. coping with the extreme atmospheres

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A 100-kg running back runs at 5 m/s into a stationary linebacker. It takes 0.5 s for the running back to be completely stopped.
Elza [17]

Answer:

1000 N

Explanation:

First, we need to find the deceleration of the running back, which is given by:

a=\frac{v-u}{t}

where

v = 0 is his final velocity

u = 5 m/s is his initial velocity

t = 0.5 s is the time taken

Substituting, we have

a=\frac{0-5 m/s}{0.5 s}=-10 m/s^2

And now we can calculate the force exerted on the running back, by using Newton's second law:

F=ma=(100 kg)(-10 m/s^2)=-1000 N

so, the magnitude of the force is 1000 N.

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Mirrors reflect light waves.
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Is the earth clean...? <br> A. hell no! <br> B. YES<br> C. I dont know.
Tamiku [17]

Answer:

A

Explanation:

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Two wheels having the same radius and mass rotate at the same angular velocity ((Figure 1) ). One wheel is made with spokes so n
liubo4ka [24]

Answer:

E. The wheel with spokes has about twice the KE.

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Each of the following would cause an increase in blood pressure except __________.
kicyunya [14]

Answer:

an inhibitor of angiotensin II

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