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77julia77 [94]
3 years ago
5

Which is a unique feature of Venus? A. Its surface is well below freezing. B. Its surface is hot enough to melt lead. C. It has

liquid water on the surface. D. It is heavily cratered.
Physics
2 answers:
Mkey [24]3 years ago
7 0
The correct answer is B. can you please help me answer my latest question too?
Sophie [7]3 years ago
6 0
It has a surface that is well below freezing.
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An automobile starter motor has an equivalent resistance of 0.0510 Ω and is supplied by a 12.0 V battery with a 0.0090 Ω interna
Alisiya [41]

Answer:

a) 200A

b) 10.2V

c) 2.04kW

d)

I=80A

V=4.08V

P=0.326kW

Explanation:

Here we have a circuit of one power source and two resistors in series, the first question is asking for the current, so according to Ohm's Law:

I=\frac{V}{R}

Where R is the equivalent resistance of the resistors in series

R=0.0510+0.0090=0.0600[ohm]

I=\frac{12.0}{0.0600}=200A

To calculate the voltage dropped by the motor we have to apply the voltage divider rule:

V_m=V*\frac{R_m}{R_m+R_s}\\V_m=12.0*\frac{0.0510}{0.0600}\\V_m=10.2V

The power dissipated supplied to the motor is given by:

P=I^2*R_m\\P=(200)^2*0.0510=2.04kW

now solving adding a 0.0900 ohm resistor:

I=\frac{12.0}{0.15}=80A

V_m=12.0*\frac{0.0510}{0.15}\\V_m=4.08V

P=I^2*R_m\\P=(200)^2*0.0510=0.326kW

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What is the mechanical advantage of the screw shown below? O A. 14.1 O B. 2 O C. 12.6 O D. 8.2.​
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11.304/0.9= 12.56

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How are motors and generators different?
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A generator converts mechanical energy into electrical energy, while a motor does the opposite - it converts electrical energy into mechanical energy
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