Will a change in the frequency of sound affect its speed?

Answers

Answer 1

Answer: Only an alteration in the properties of the medium will cause a change in the speed.

Answer 2

Answer: Not the speed but it does change the wave lengths

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An electric dryer consumes 6.0 × 10^6 joules ofelectrical energy when operating at 220 volts for1.8 × 103 seconds. During operation, the dryerdraws a current of(1) 10. A (3) 9.0 × 102 A(2) 15 A (4) 3.3 × 103 A

Suppose that the electric potential outside a living cell is higher than that inside the cell by 0.0677 V. How much work is done by the electric force when a sodium ion (charge = +e) moves from the outside to the inside?

Answers

Answer: Recall that

Work (W) = - e × ∆V

Where

Charge of electron= 1.6 × 10^ -19 c

And from the question we were given change in potential as = -0.0677V

Work = - (1.6 × 10^-19) × (-0.0677)

Work= 1.0832 × 10^-20J

Therefore the work done by the electric force when a sodium ion (charge = +e) moves from the outside to the inside is 1.0832×10^-20

a bullet of mass 40 gm is fired from a gun of mass 8 kg with a velocity of 800 m/s, calculate the recoil velocity of gu