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olga_2 [115]
2 years ago
10

Help me with this review question please.

Physics
1 answer:
QveST [7]2 years ago
6 0

Answer:

K E=( mv²)/2

=(60×3.5²)/2

=367.5J

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Match the property of a sound wave to the correct definition. A. amplitude . B. frequency  . C. period . D. pitch  E. loudness 
Maru [420]

Amplitude: How dense the medium is in the compression part of the wave, and how empty the rarefied area is.

Frequency: The number of wavelengths that pass a position in 1 second.

loudness: The quality of the sound that is most closely linked to the amplitude of the sound wave.

Period: The amount of time that it takes one wavelength to pass by a position.

Pitch: The quality of the sound that is most closely linked to the frequency of the sound wave.

5 0
3 years ago
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If a 0.15 kg ball falls and has a KE of 20 J just before striking the ground, from what height did it fall. A. 1.36m B. 3m C. 13
RUDIKE [14]
According to the conservation of mechanical energy, the kinetic energy just before the ball strikes the ground is equal to the potential energy just before it fell. 

Therefore, we can say KE = PE
We know that PE = m·g·h

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We can solve for h:

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   = 20 / (0.15 · 9.8) 
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The correct answer is: the ball has fallen from a height of 13.6m.

5 0
3 years ago
A solid cylinder has a diameter of 17.4 mm and a length of 50.3mm. It's mass is 49g . What is its density of the cylinder in met
Tamiku [17]

Answer:

4 tonne/m³

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Converting to tonnes/m³:

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ρ = 4.1 tonne/m³

Rounding to one significant figure, the density is 4 tonne/m³.

6 0
2 years ago
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<span>coefficient
       
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3 0
3 years ago
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Galina-37 [17]
The nucleons(protons and neutrons) are held together by means of this strong force. If this strong never existed, all the nucleus will blow themselves due to strong repulsive force between protons(neutron has no charge).
Thats it!
If I explain beyond, it will surely bounce off your head. Anyways, if you wanna know more bout it, ping me. (:
4 0
3 years ago
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