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adoni [48]
3 years ago
5

The voltage across the terminals of an ac power supply varies with time according to V=V0cos(t). The voltage amplitude is V0 = 4

1.0V .
A. What is the root-mean-square potential difference Vrms?
B. What is the average potential difference Vav between the two terminals of the power supply?
Physics
1 answer:
kirza4 [7]3 years ago
5 0

Answer:

A) V_rms = 29 V

B) Vav = 0 V

Explanation:

A) We are told that;

V = V_o cos ωt

voltage amplitude; V = V_o = 41.0V

Now, the formula for the root-mean-square potential difference Vrms is given as;

V_rms = V/√2

Thus plugging in relevant values, we have;

V_rms = 41/√2

V_rms = 29 V

B) Due to the fact that the voltage is sinusoidal from the given V = V_o cos ωt, we can say that the average potential difference Vav between the two terminals of the power supply would be zero.

Thus; Vav = 0 V

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A 0.14-MIN baseball is dropped from rest. It has a momentum of 0.90 kg⋅m/skg⋅m/s just before it lands on the ground.
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The time spent in the air by the ball at the given momentum is 6.43 s.

The given parameters;

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The impulse experienced by the ball is calculated as follows;

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The time of motion of the ball is calculated as follows;

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7 0
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an object of mass 8 kg is whriled round in a vertical circle of radius 2m with a constant speed of 6m/s .Then the maximum and mi
algol13

Answer:

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Explanation:

Given

mass =8 kg

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Minimum tension= [(mv^2/ r) - (mg)]

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Minimum tension= [8 × 6^2)/2 -(8×9.8)]

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