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miss Akunina [59]
3 years ago
13

A bus starts to move from rest. If its velocity becomes 90 km per hour after 8 s, calculate its acceleration. ​

Physics
1 answer:
iren [92.7K]3 years ago
6 0

Answer:

4.05*10^7m/s^2

Explanation:

v1=0

v2=90*1000*3600=324000000

t=8

a= (v1 -v2)/t

P.T.Vs,

a=(0-324000000)/8      90*1000 ,90000*3600

as they r talking about km per hour so kilo is = 1000 and hour=min*sec

1hour-60min and 1min=60sec  so 60*60=3600 so simply we have to multiply 90 with 1000 and then with 3600.formula a=(v1 -v2)/t

a=40500000m/s^2 or

a=4.05*10^7m/s^2

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The clicker emits EM (electromagnetic) wave which travels at the speed of light, that is
v = 3 x 10⁸ m/s

The frequency is
f = 900mHz = 9 x 10⁸ Hz

Because velocity = frequency * wavelength, the wavelength, λ,  is given by
fλ = v
λ = v/f
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5 0
3 years ago
Two rocks of different masses are rolling down a hill at the same speed. Which rock (small one or big one) would have more kinet
aivan3 [116]

Answer:

Kinetic energy of bigger rock will be more than that of smaller one.

Explanation:

Kinetic energy of the rock is given by,

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As velocity of both the rocks are same. Thus, kinetic energy is directly proportional to the mass of the rock

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3 0
3 years ago
Read 2 more answers
A burning piece of wood converts ____ energy into ____ energy​
liq [111]

Answer:

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8 0
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mart [117]

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4 0
3 years ago
HELP MEEEE, question number 5
Kryger [21]

Answer:

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6 0
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