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Natalka [10]
3 years ago
14

Light waves from the sun can travel through outer space and reach the earth. This suggests that light is a(n)

Physics
1 answer:
garik1379 [7]3 years ago
8 0

Answer:

D) Electromagnetic waves

Explanation:

This is because with  compression waves and longitudinal waves a medium is required such as air. however in a vacuum this will not work

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Which event in a solar cell uses the photoelectric effect?
musickatia [10]

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Light shone on metal expulses electrons from its surface. This phenomenon is the photoelectric effect, and the electrons are called photoelectrons. Experiments indicate that by increasing light frequency, the kinetic energy of the photoelectrons increases, and by intensifying the light, the current increases

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Please help I need help this is so confusing to me
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C. increased stirring i think
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A 6.0 kg object undergoes an acceleration of 2.0 m/s2 .
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A. Fnet=ma
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B. Fnet=ma
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What two factors affect the rate of acceleration in an object
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The suspension system of a 2100 kg automobile "sags" 8.5 cm when the chassis is placed on it. Also, the oscillation amplitude de
Gennadij [26K]

Answer:

Part a)

k = 6.06 \times 10^4 N/m

Part b)

b = 1795.4 kg/s

Explanation:

Part a)

as the mass of the suspension system is given as

m = 2100 kg

also we have

x = 8.5 cm

so now for force balance we have

mg = kx

(525)(9.81) = k(0.085)

k = 6.06 \times 10^4 N/m

Part b)

Now we know that amplitude decreases by 63% in each cycle

so after one cycle the amplitude will become 37% of initial amplitude

so it is given as

A = 0.37 A_o

also we know

A = A_o e^{-bt/2m}

0.37 A_o = A_o e^{-bt/2m}

\frac{bt}{2m} = 1

b = \frac{2m}{t}

here t = time period of one oscillation

so it is

t = 2\pi\sqrt{\frac{m}{k}}

t = 2\pi\sqrt{\frac{525}{6.06 \times 10^4}}

t = 0.58 s

now damping constant is

b = \frac{2(525)}{0.58}

b = 1795.4 kg/s

7 0
3 years ago
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