3 years ago

When you push a box with 20N of force what force does the box apply back on you ?

1 answer:

3 0

Newton’s 3rd Law: for every action there is an equal but opposite reaction.
Assuming that the box is motionless, we can say the force is -20N

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When the electron in a hydrogen atom moves from n = 6 to n = 1, light with a wavelength of ________ nm is emitted?

Oduvanchick [21]

First we find the energy level with the following formula, where a is the energy level, n1 is the final energy level, n2 is the starting energy level and r is Rydberg's constant in Joules
$a = r \times ( \frac{1}{n1} - \frac{1}{n2} )$
We insert the values

$a = 2.18 \times {10}^{ - 18} \times ( \frac{1}{ {1}^{2} } - \frac{1}{ {6}^{2} } )$
$= 2.12 \times {10}^{ - 18}$
The wavelength is found with this formula, where h is Planck's constant and c is the speed of light
$wavelength = \frac{h \times c}{a}$
Finally we insert the values
$\frac{6.626 \times {10}^{ - 34} \times 3 \times {10}^{8} }{2.12 \times {10}^{ - 18} } = 9.376 \times {10}^{ - 8}$
Which is the same as 93.8 nm

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3 years ago

Since the moon has less mass than the earth what happens to objects on the moon

postnew [5]

When you drop an object on the moon, it falls to the ground.
But it only falls about 1/6 as fast as it falls on Earth.

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3 years ago

HELPPPPPPP PLEASE!!! does anybody have the answer key to edge. physics lab report : mechanical equivalent to heat? one page of d

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Answer:

the mechanical equivalent of heat states that motion and heat are mutually interchangeable and that in every case

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Why do remote controls for TV’s use infrared waves to communicate?

Delvig [45]

Answer: An IR remote (also called a transmitter) uses light to carry signals from the remote to the device so it can be controlled. It emits pulses of invisible infrared light that correspond to specific binary codes. These codes represent commands, such as power on, volume up, or channel down.

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A perpendicular force is applied to a certain area and produces a pressure P. If the

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Answer:

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Explanation:

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