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2 years ago

13

When an object is lifted 12 meters off the ground, it gains a certain amount of potential energy. If the same object is lifted 2

4 meters off the ground, its potential energy is
A.
the same.
B.
three times as much.
C.
twice as much.
D.
four times as much.

1 answer:

alexandr402 [8]2 years ago

8 0

I think the answer is twice as much

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Who could explain the phenomenom of interference of light?

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Answer:

When the waves reflected from the inner and outer surface combine they will interfere with each other, removing or reinforcing some parts of white light by destructive or constructive interference. ... This results in color.

Explanation:

this is what we studied

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3 years ago

Monochromatic light with a wavelength of 6.4 E -7 meter passes through two narrow slits, producing an interference pattern on a

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Answer:

The distance between the slits is given by 1.3 × $10^{-4}$ m

Given:

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To find:

distance between slits, d = ?

Formula used:

y = $\frac{m \times \lambda \times D}{d}$

y = distance of first bright band from central maxima

D = distance between screen and source

d = distance between slits

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Solution:

distance of first bright band from central maxima is given by,

y = $\frac{m \times \lambda \times D}{d}$

y = distance of first bright band from central maxima

D = distance between screen and source

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Thus,

d = $\frac{m \times \lambda \times D}{y}$

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The distance between the slits is given by 1.3 × $10^{-4}$ m

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3 years ago

An astronaut is rotated in a horizontal centrifuge at a radius of 5.0 m. (a) What is the astronaut’s speed if the centripetal ac

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Explanation:

Given that,

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3 years ago

Dafna1 [17]

1. is D. Scientific method cannot be replaced.
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3 years ago

Read 2 more answers

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Sladkaya [172]

Answer:

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So the original equation can be written as

$F=\frac{m(v-u)}{\Delta t}$

In this problem:

m = 5 kg is the mass of the fist

u = 9 m/s is the initial velocity

v = 0 is the final velocity

F = -45,000 N is the force applied (negative because its direction is opposite to the motion)

Therefore, we can re-arrange the equation to solve for the time:

$\Delta t=\frac{m(v-u)}{F}=\frac{(5)(0-9)}{-45,000}=0.001 s$

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3 years ago