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Ne4ueva [31]
3 years ago
13

A 1,000 kg car uses a braking force of 10,000 N to stop in 2s. What impulse acts on the car?

Physics
1 answer:
Fantom [35]3 years ago
8 0

Answer:

20,000Ns

Explanation:

Impulse = Ft

I = (10,000)(2)

I = 20,000

Note the mass is extra unnecessary information provided. Vertical components do not affect horizontal motion. The mass would be useful if the car had a friction force.

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1 Point
prohojiy [21]

Answer:

a

Explanation:

because it taken the rock more time to hit the water

8 0
4 years ago
Many people believe that a vacuum created inside a
pashok25 [27]

Answer:Due to the pressure difference created by rotating fans.

Explanation:

In most of the  vacuum cleaners, there is an area which is of disc shape and it is in right next to the motor. There are several fans within the disc that spin at a very high velocity.

The blades will push the air outside of the disk.There is no air in inside of the disc and  air pressure creates which  pushes air inside the disk to replace the missing air.

So motor is pushing the air outside and to maintain this pressure the air is pushing toward inside with dirt.

3 0
3 years ago
An infinite plane lies in the yz-plane and it has a uniform surface charge density.
Allisa [31]

Answer:

<u>So the correct answer is letter e)</u>

Explanation:

The electric field of an infinite yz-plane with a uniform surface charge density  (σ) is given by:

E=\frac{\sigma }{2\epsilon_{0}}

Where ε₀ is the electric permitivity.

<u>As we see, this electric field does not depend on distance, so the correct answer is letter e)</u>

I hope it helps you!

6 0
3 years ago
The North American and European plates of the
faust18 [17]
Distance = speed/time

width/distance given is 2.9*10^3 miles
1 mile=1.6*10^6mm
total distance now is 2.9*1.6*10^9
speed is 25 mm/yr
plug the values,
therefore the rift takes approximately 185600000 years for a width <span>of 2.9 x 10^3 mi.</span>
5 0
3 years ago
A horizontal metal bar oriented east-west drops straight down in a location where the earth's magnetic field is due north. as a
amid [387]

Metal bar is aligned along East- West direction and it is dropped vertically down

So its velocity is along -Z direction,

Now the Earth's magnetic field is towards north so its towards +Y direction

now we have formula for force on a moving charge

F = q(v X B)

v = - z direction

B = + y direction

now by the above formula

F = q(v(-k) X B(j))

F = qvB (i)

So force is towards East

so all positive charge is towards East end


5 0
3 years ago
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