3 years ago

Which best describes the way a sound wave is sent through the radio

Physics

2 answers:

wlad13 [49]3 years ago

6 0

Answer:

sound wave-electrical wave-radio wave

Zinaida [17]3 years ago

6 0

Answer:

Explanation:

on edg

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Which of the following physical properties would tell you about an element's mass per unit volume ratio?

Igoryamba

Well I can't see the following physical properties you talked about in the question.

Mass per unit volume ratio is called density.

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3 years ago

A flow of electric charge in a wire normally requires a _________.

just olya [345]

Flow of electric charge in a wire requires " ELECTRONS "

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Help please what law is happening in these pictures

Karolina [17]

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3 years ago

You and your friend throw balloons filled with water from the roof of a several story apartment house. You simply drop a balloon

ivann1987 [24]

Answer:

74.529 m

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.8 m/s²

For first ball

$s=ut+\frac{1}{2}at^2\\\Rightarrow s=0\times t+\frac{1}{2}\times 9.8\times t^2\\\Rightarrow s=4.9t^2\ m$

For second ball

$s=ut+\frac{1}{2}at^2\\\Rightarrow s=50.96\times (t-2.6)+\frac{1}{2}\times 9.8\times (t-2.6)^2\\\Rightarrow s=25.48t-99.372+4.9t^2$

As the displacement is equal

$25.48t-99.372+4.9t^2=4.9t^2\\\Rightarrow t=\frac{99.372}{25.48}\\\Rightarrow t=3.9\ s$

$s=4.9\times 3.9^2=74.529\ m$

So, height of the building is 74.529 m

3 0

3 years ago

A projectile is launched from ground level at an angle of 50.0 degrees above the horizontal with a speed of 30.0 m/s. If the pro

Allushta [10]

Answer:

4.69 s

Explanation:

u = Initial velocity = 30 m/s

$\theta$ = Angle of launch = $50^{\circ}$

g = Acceleration due to gravity = $9.81\ \text{m/s}^2$

Time taken by the projectile to land is given by

$t=\dfrac{2u\sin\theta}{g}\\\Rightarrow t=\dfrac{2\times 30\times \sin50^{\circ}}{9.81}\\\Rightarrow t=4.69\ \text{s}$

The time the projectile is in the air before it contacts the ground again is 4.69 s.

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3 years ago