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arsen [322]
3 years ago
5

7.

Physics
1 answer:
Agata [3.3K]3 years ago
7 0

Answer:

7. the ball with a mass of 8.0kg

8.1225 kg

9.4.2 kg-m/sec

10.15m/sec

11.0.001kgm/sec

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In a convex lense f=20cm, m=1,then what is u and v?​
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How much force is needed to keep the 750000 Newton Space Shuttle moving at a constant speed of 28000 km/h, in a straight line?
Alika [10]

The force needed to keep the space shuttle moving at constant speed is 0.

The given parameters;

  • <em>weight of the space shuttle, F = 750,000 N</em>
  • <em>constant speed of the space shuttle, v = 28,000 km/h</em>

The mass of the space shuttle is calculated as follows;

W = mg\\\\m = \frac{W}{g} \\\\m = \frac{750,000}{9.8} \\\\m = 76,530.61 \ kg

The force needed to keep the space shuttle moving at constant speed is calculated as follows;

F = ma

F = 76,530.61 \times a

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At a constant speed, acceleration is zero.

F = 76,530.61 x 0

F = 0

Thus, the force needed to keep the space shuttle moving at constant speed is 0.

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2 years ago
For a given wave if the frequency doubles the wave length?
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For a given wave in a given medium, if the frequency doubles,
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3 years ago
A roller coaster weighing 2000 kg is lifted to a height of 28 m within 30 seconds with a kind of elevator.Calculate how many kil
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Answer:

Explanation:

The equation for Power is

P = Work/time to do work and the equation for work is

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P = 18 kW of power.

7 0
2 years ago
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