3 years ago

2. What type of motion objects that fall under the pull of gravity?

1 answer:

4 0

Kinetic Energy Pulls Any object to the ground.This Energy is a part of Gravity.
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Please answer this. Science 7th grade.

nikdorinn [45]

Answer:

the answer would be 2

Explanation:

it would be 2 because if u look at the diagram the darkest arrow is pointsin towards earth and the moon and when the moon is infront of the sun it cause's an eclispe

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Cellular telephone use

m_a_m_a [10]

A- Radio waves, is the answer

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In which of these situations would there be the least kinetic energy?

Alexandra [31]

C. a truck rolling down hill

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3 years ago

A photon of wavelength 192 nm strikes an aluminum surface along a line perpendicular to the surface and releases a photoelectron

alex41 [277]

Answer:

$KE=3.529\times10^{−27}\ J$

Explanation:

Given that

Wavelength λ=192 nm

So energy of photon,E

$E=\dfrac{hC}{\lambda }$

Now by putting the values

$h=6.6\times 10^{-34}\ m^2.kg/s$

$C=3\times 10^{8}\ m/s$

$E=\dfrac{6.6\times 10^{-34}\times 3\times 10^{8}}{192\times 10^{-9} }$

$E=1.03\times 10^{-18} J$

We know that

Kinetic energy given as

$KE=\dfrac{P^2}{2m}$

$KE=\dfrac{E^2}{2mC^2}$

$KE=\dfrac{(1.03\times 10^{-18})^2}{2\times 1.67\times 10^{-27}(3\times 10^8)^2}$

$KE=3.529\times10^{−27}\ J$

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3 years ago

Which of the following statements is true based on the law of conservation

ipn [44]

Answer:

Explanation:

The mass of something before it's been processed is the same as it's mass after the process.

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