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3 years ago

10

A spacecraft left Earth to collect soil samples from Mars. Which statement is true about the strength of Earth’s gravity on the

moving spacecraft?

1 answer:

ryzh [129]3 years ago

5 0

Answer:

: It Decreases.

As the spacecraft gets farther and farther from Earth, the gravitational

forces between the spacecraft and the Earth decrease.

Explanation:

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A student drops a rock from a bridge to the water 12.7 m below. with what speed does the rock strike the water? the acceleration

kolezko [41]

The rock strike the water with the speed of 15.78 m/sec.

The speed by which rock hit the water is calculated by the formula

v= $\sqrt{2gh}$

v= $\sqrt{2*9.8*12.7}$

v=15.78 m/sec

Hence, the rock strike the water with the speed of 15.78 m/sec.

7 0

2 years ago

How many joules of work are done on a box when a force of 25 N pushes it 3 m?

Anika [276]

Answer:

75joules

Explanation:

Workdone = force x distance

workdone = 25 x 3

workdone = 75joules

7 0

2 years ago

Are Constellations based on the magnitude of stars.

Nikolay [14]

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4 0

3 years ago

Read 2 more answers

Show work/ no links

ryzh [129]

7) p=w/t
2620/0.2
=13100W

8) W=pt
40*30
=1200 J

9) transformed

7 0

2 years ago

A block of mass 0.254 kg is placed on top of a light, vertical spring of force constant 5 100 N/m and pushed downward so that th

ryzh [129]

Answer:

8.86 m

Explanation:

According to the law of conservation of energy, the elastic potential energy initially stored in the spring will be converted into gravitational potential energy of the block when it is at its maximum height:

$\frac{1}{2}kx^2 = mgh$

where

k = 5100 N/m is the spring constant

x = 0.093 m is the spring compression

m = 0.254 kg is the mass of the block

g = 9.8 m/s^2 is the acceleration due to gravity

h is the maximum height of the block

Solving the equation for h, we find

$h=\frac{kx^2}{2mg}=\frac{(5100 N/m)(0.093 m)^2}{2(0.254 kg)(9.8 m/s^2)}=8.86 m$

3 0

3 years ago