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3 years ago

What energy transformation takes place when you stretch a bungee cord?

Physics

1 answer:

Rzqust [24]3 years ago

4 0

Answer:

<h3>D.</h3><h2>Potential energy transforms into elastic energy.</h2>

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Consider a ball of 0.22 kg, initially at rest, is dropped from an initial height of 1.80 m. It rebounds back after colliding wit

I am Lyosha [343]

Answer:

The impulse on the ball delivered by the floor is 2.52 kg-m/s.

Explanation:

Given that,

Mass of the ball, m = 0.22 kg

It is dropped from an initial height of 1.80 m. It rebounds back after colliding with the floor to a final height of 1.50 m. Initial velocity and final velocity can be calculated using conservation of energy as :

$u=\sqrt{2gh} \\\\u=\sqrt{2\times 10\times 1.8} \\\\u=6\ m/s$

Final velocity,

$v=\sqrt{2gh'} \\\\v=\sqrt{2\times 10\times 1.5} \\\\v=5.47\ m/s$

As the ball rebounds, v = -5.47 m/s

We need to find the impulse on the ball delivered by the floor. We know that impulse is equal to the change in momentum as follows :

$J=m(v-u)\\\\J=0.22\times ((-5.47)-6)\\\\J=-2.52\ kg-m/s$

So, the impulse on the ball delivered by the floor is 2.52 kg-m/s.

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3 years ago

YO IF YOU ARE GOOD AS SCIENCE PLEASE ANSWER THIS QUESTION IT WOULD HELP A LOT NO LINKS!!!

zhuklara [117]

Answer:

1 and 5 and 3

Explanation:

hope this helps

7 0

3 years ago

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I need answers please i will give you 20

iren2701 [21]

Yes it will, amplitude has influence on speed.

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3 years ago

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Consider a ship of mass 2 x 10^6 kg with propeller blades of radius 7 m and it can push water backwards to a speed of 2 m/s. Giv

PolarNik [594]

Answer:

$a = 0.308 m/s^2$

Explanation:

As we know that the force due to propeller when it will push the water backwards is given as

$F = \frac{dP}{dt}$

now we know that

$P = mv$

so we have

$F = v\frac{dm}{dt}$

$F = v \rhoA\frac{dx}{dt}$

$F = \rho A v^2$

here we know that

$A = \pi r^2$

$A = \pi(7^2)$

$A = 154 m^2$

now the force is given as

$F = (1000)(154)(2^2)$

$F = 616000 N$

now the acceleration of the ship is given by Newton's II law

$a = \frac{F}{m}$

$a = \frac{616000}{2 \times 10^6}$

$a = 0.308 m/s^2$

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3 years ago

Which statement describes what will most likely occur when warm air cools and the temperature drops to the

Alchen [17]

Answer:

Water Vapor in the air will evaporate

Explanation:

if im wrong please correct me. But i believe that is the right answer.

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