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pashok25 [27]
3 years ago
5

A spring scale hung from the ceiling stretches by 6.1cm when a 2.0kg mass is hung from it. The 2.0kg mass is removed and replace

d with a 2.8kg mass.What is the stretch of the spring?
Physics
1 answer:
Anarel [89]3 years ago
8 0
2.0kg and the mass of sometimes makes it hard 2.8kg
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Perpetual motion machines have fascinated people especially inventors for hundreds of years before the laws of thermodynamics be
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Given the fact that energy conversion is not entirely efficient, it is impossible to produce a perpetual motion machine.

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The perpetual motion machine in one that is able to work continuously without stopping. This would mean that the efficiency of this machine must that the machine is 100% efficient which violates the second law of thermodynamics.

Thus, given the fact that energy conversion is not entirely efficient and energy looses cause machines not function effectively, it is impossible to produce a perpetual motion machine.

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A construction worker is pushing a 50.0-kg box with a force of 150.0 N to the right. If the box is moving at a constant velocity
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Yes omg yes I literally have the same question and need to find the answer
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2 years ago
Three rocks with masses of 1 kg, 5 kg, and 10 kg fall from the same height.
Naily [24]
Answer:
The 10 kg rock has more inertia than the other two rocks.


Explanation
4 0
2 years ago
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Which of the following is not a physical change?
Alekssandra [29.7K]
C because of galvination is sized
5 0
3 years ago
A 2000-kg railway freight car coasts at 4.4 m/s underneath a grain terminal, which dumps grain directly down into the freight ca
ruslelena [56]

Answer:

933. 3kg

Explanation:

We are given that

Mass,m=2000 kg

Initial speed,u=4.4 m/s

We have to find the maximum mass of grain if the speed of loaded freight car must not go below 3.0 m/s.

Final speed,v=3 m/s

By conservation of momentum

Initial momentum=Final momentum

mu=m'v

Substitute the values

2000\times 4.4=m'(3)

m'=\frac{2000\times 4.4}{3}

m'=2.93\times 10^3 kg

Mass of freight loaded car=2933.3 kg

Mass of grains=2933.3-2000=933.3 kg

Hence, the maximum  mass of grains that it can accept=933.3 kg

7 0
3 years ago
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