3 years ago

How do vibration produce sound?

2 answers:

5 0

Vibrations form sound by releasing compressional sound waves. For example, in a guitar, when chords are strung they vibrate and produce sound.

Paladinen [302]3 years ago

4 0

All vibrating bodies produce sounds in molecules of the medium they are as air,wood,water

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dexar [7]

7.5 I think because it can not be 9 because it’s not close to 50

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3 years ago

A motor develops 80 kW of power as it lifts a loaded elevator 20.5 m in 45 s. How much force does the motor exert? *

yuradex [85]

Answer:

F=1.3⋅105N

Explanation:

It's common knowledge.

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3 years ago

Do all objects have inertia <br><br> a) true<br> b) false

Natasha2012 [34]

Answer:

The answer is A. Which is true

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3 years ago

A small cube of metal measures 19.0 mm on a side and weighs 79.6 g. What is the density of the metal in g/cm3?

Nady [450]

Answer:

density of cube =11.605 g/cm³

Explanation:

density of a substance is the mass per unit volume of that substance.

the density of a substance = $\frac{mass}{volume}$

volume of a cube = l³,

l = 19.0mm , lets convert mm to cm

1mm = 0.1cm, thus, 19mm =19*0.1 =1.9cm

length of cube =1.9cm

volume of cube = 1.9³

density of cube = $\frac{79.6}{1.9^{3} }$

density of cube =11.605 g/cm³

8 0

3 years ago

(b)

m_a_m_a [10]

Answer:

Driving force increases, friction forces increase, the driving force is bigger than friction 12.

Explanation:

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3 years ago