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horrorfan [7]
2 years ago
15

What is the momentum of a 750 kg car traveling at a velocity of 25 m/s north?

Physics
2 answers:
elixir [45]2 years ago
5 0

Answer:

18750 kg-m/s

Explanation: Momentum = mass x velocity 750x25 = 18750 kg-m/s

Can you brainlist

olga_2 [115]2 years ago
3 0

Answer:

18750 kg-m/s

Explanation:

Momentum = mass x velocity 

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A fan that is switched on for 1 minute uses 500 W usefully but also wastes 300 W through the emission of sound and heat. What's
koban [17]

Explanation:

Efficiency is defined as the ratio between the useful output over the total amount consumed. E = \frac{useful}{total}

The fan does 500W of useful work while wasting 300 W. The total power consumption is 800 W (500 + 300).

6 0
3 years ago
Starburst galaxies:
alexgriva [62]

Answer:

are often associated with a galaxy that is colliding with another galaxy.

Explanation:

A starburst galaxy is a galaxy that undergoes very fast formation of stars. The rate at which stars are born is 100 times more than 3 solar masses per year of the Milky Way. The starburst is stage of the formation of a galaxy. After this stage is complete the stars will have used almost all the gas in it. As the star formation rate is very fast the difference between the age of the stars and the galaxy itself is very less. The star formation is triggered by mergers and tidal interactions between gas-rich galaxies.

6 0
3 years ago
Two identical blocks, block A and block B, are placed on different horizontal surfaces. Block A is initially at rest on a smooth
Nostrana [21]

Answer:

(D) Va > Vb. The forces between the atoms in a block and the atoms in a surface oppose the motion of the block and are greater on average for block B.

Explanation:

Given that, Two identical blocks, block A and block B, are placed on different horizontal surfaces. Block A is initially at rest on a smooth surface, while block B is initially at rest on a rough surface.

And now, a constant force F₀ is exerted on each block for a time Δt.

Now, speeds of blocks A and B are vA and vB respectively.

In case of block A the surface is smooth, so there is no opposing force.

Whereas as, in case of block B, the surface is rough which means friction opposes the motion

So, some of the applied force is used to overcome this friction which makes the speed of block B vB to be less than that of block A vA.

⇒ Va > Vb.

And completely eliminating friction is not possible.

so, even smooth surface has friction which is very very little.

so, The forces between the atoms in a block and the atoms in a surface oppose the motion of the block and are greater on average for block B.

3 0
3 years ago
Whats the difference between work and power
Vika [28.1K]
The main relationship or difference between<span> the two is time. </span>Work<span> is the amount of energy necessary to move an object from one point to another. Imagine moving a table or seat from your living room to your dining room. On the other hand, </span>power<span> is the rate at which the energy is spent.</span>
8 0
3 years ago
Read 2 more answers
A motor is operating at 3450 RPM and is producing a torque of 32 lb-in. What is the output horsepower of the motor?
ra1l [238]

Answer:

11561W

Explanation:

6 0
3 years ago
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