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vladimir2022 [97]
3 years ago
8

Select the correct answer. Which electromagnetic waves have the highest frequencies in the electromagnetic spectrum?

Physics
1 answer:
Law Incorporation [45]3 years ago
4 0

Answer:

Your answer would be C, Radio waves.

Explanation:

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Which best describes the second law of thermodynamics? energy is not created nor destroyed, but it can change into matter. energ
otez555 [7]
<span>the answer is energy is not created nor destroyed, but it can change from one energy form to another.</span>
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3 years ago
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A 4.3 kg steel ball and 6.5 m cord of negligible mass make up a simple pendulum that can pivot without friction about the point
Alekssandra [29.7K]

Answer

given,

mass of steel ball, M = 4.3 kg

length of the chord, L = 6.5 m

mass of the block, m = 4.3 Kg

coefficient of friction, μ = 0.9

acceleration due to gravity, g = 9.81 m/s²

here the potential energy of the bob is converted into kinetic energy

m g L = \dfrac{1}{2} mv^2

v= \sqrt{2gL}

v= \sqrt{2\times 9.8\times 6.5}

      v = 11.29 m/s

As the collision is elastic the velocity of the block is same as that of bob.

now,

work done by the friction force = kinetic energy of the block

f . d = \dfrac{1}{2} mv^2

\mu m g. d = \dfrac{1}{2} mv^2

d=\dfrac{v^2}{2\mu g}

d=\dfrac{11.29^2}{2\times 0.9 \times 9.8}

    d = 7.23 m

the distance traveled by the block will be equal to 7.23 m.

8 0
3 years ago
Roughly how many stars are in the Milky Way Galaxy?
svetlana [45]

Answer:

there are many stars in the milky way galaky

Explanation:

uncountable stars

7 0
3 years ago
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Look at the circuit diagram. Which of these components is part of the circuit?
tangare [24]
I think the answer is c AC power source
Hope this help you?
4 0
2 years ago
An object is thrown upwards with the speed of 40.0 km/hr in 5 second, calculate the distance in millimeters (mm).
sertanlavr [38]
V=(40km/hr)(hr/3600s)(1000000mm/km)
v=11111.1mm/s

v=d/t
d=vt
d=(11111.1mm/s)(5s)
d=55555mm
d=5.56x10^4mm
4 0
2 years ago
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