3 years ago

How electricity has changed what we do for entertainment?

Physics

1 answer:

NNADVOKAT [17]3 years ago

3 0

when we use our phones

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What is the term for heat transfer because of the movement of electromagnetic waves?

olchik [2.2K]

It is radiation that transfers heat energy through space by electro radiation.

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4 years ago

What is the current flowing through the circuit shown? (V= 120 V, R₁ = 20 02,

spayn [35]

Assumed that resistors are connected in series .

R_net=20+50+10=80ohm

Voltage=V=120V

Current=I

V/R
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2 years ago

In uniform circular motion, how does the acceleration change when the speed is increased by a factor of 3? When the radius is de

crimeas [40]

Answer:

The acceleration will become 9/2 times.

a' =9/2 a

Explanation:

We know that acceleration of a particle when it is moving in the circular path is given as

$a=\omega^2\ r$

r=radius

ω= angular speed

If the speed ω '= 3 ω

If the radius , $r'=\dfrac{r}{2}$

The final acceleration =a'

$a'=\omega^2'\ r'$

$a'=(3\omega)^2\times \dfrac{r}{2}$

$a'=9\omega^2\times \dfrac{r}{2}$

$a'=\omega^2\times \dfrac{9r}{2}$

$a'= \dfrac{9r}{2}\times \omega^2\times r$

$a'=\dfrac{9}{2}a$

Therefore the acceleration will become 9/2 times.

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3 years ago

Jack is falling down the hill at a speed of 12 m/s. If Jack has a mass of 45 kg, what is his kinetic energy?

Troyanec [42]

Answer:

K=3240J

Explanation:

speed=12m/s

m=45kg

K=½mv²

K=½(45•144)J=3240J

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3 years ago

Hello random people who use this app

ddd [48]

Answer:

Hello stranger I don't know

Explanation:

._____.

8 0

3 years ago

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