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Juli2301 [7.4K]
3 years ago
5

A yellow ball with a mass of 2 kg is rolling across the floor at 3 mis. A red ball with a mass of 3 kg is rolling across th

Physics
1 answer:
vodka [1.7K]3 years ago
3 0
The equation for kinetic energy is
Ke=1/2mv^2

Therefore, the yellow ball would be 1/2(2)(3)^2 and red would be 1/2(3)(3)^2. The red ball would have a greater kinetic energy

Red ball= 13.5
Yellow ball=9

The answer would be B because the red ball has a greater mass
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Answer:

Frequency required will be 2421.127 kHz

Explanation:

We have given inductance L=0.450H=0.45\times 10^{-3}H

Current in the inductor i=1.90mA=1.90\times 10^{-3}A

Voltage v = 13 volt

Inductive reactance of the circuit X_l=\frac{v}{i}

X_l=\frac{13}{1.9\times 10^{-3}}=6842.10ohm

We know that

X_l=\omega L=2\pi fL

2\times 3.14\times  f\times 0.45\times 10^{-3}=6842.10

f = 2421.127 kHz

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