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irina1246 [14]
4 years ago
15

A 1.98 kg mass is set on a spring, and the spring compression an amount 4.78 cm. what is the spring constant?

Physics
1 answer:
Zielflug [23.3K]4 years ago
8 0
Well, the spring constant is measured using the F=k∆x, where F is the force, k is the constant, and ∆x is the change in position.  So if the mass is 1.98, the force (mxg) is 19.4.  Thus the spring constant is 19.4/.0478(change in position). This equals 405.86.
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SashulF [63]
The answer is <span>A. Speed=100 million m/s and frequency = 50 million Hz.</span>

Let's calculate for each choice the wavelength using the equation:
v = f × λ   ⇒ λ = v ÷ f<span>

where:
v - the speed,
f - the frequency,
</span>λ - the wavelength.

A:
v = 100 000 000 m/s
f = 50 000 000 Hz = 50 000 000 1/s (Since f = 1/T, so units are Hz = 1/s)
⇒ λ = 100 000 000 ÷ 50 000 000 = 2 m

B:
v = 150 000 000 m/s
f = 1 500 Hz = 1 500 1/s
⇒ λ = 150 000 000 m/s ÷ 1 500 = 100 000 m

B:
v = 300 000 000 m/s
f = 100 Hz = 100 1/s
⇒ λ = 300 000 000 m/s ÷ 100 = 3 000 000 m

According to these calculations, the shortest wavelength is needed for choice A.
3 0
3 years ago
a man is standing on the edge of a 20.0m high cliff. he throws a rock vertically with an initial velocity of 10.0m/s. how high d
marin [14]

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V=0

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7 0
4 years ago
A cup of hot coffee has been left to cool in a room with an ambient temperature of 21^\circ{\text{C}}21 ∘ C21, degrees, start te
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Answer:

Explanation:

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vfiekz [6]

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fiasKO [112]
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