A clothes dryer uses about 9 amps of current from a 240 volt line. How much power does it use?
2 answers:
Answer:
Power used by dryer is 2160 watts
Explanation:
It is given that,
Current used by clothes dryer, I = 9 amps
Voltage used by dryer, V = 240 volts
We have to find the power used by it. Mathematically, the relationship between voltage, current and power is given by :
Putting the values of I and V in above equation as :
P = 2160 watts
Hence, the power used by dryer is 2160 watts.
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Answer:
a.
b.
Explanation:
I have attached an illustration of a solid disk with the respective forces applied, as stated in this question.
Forces applied to the solid disk include:
Other parameters given include:
Mass of solid disk,
and radius of solid disk,
a.) The formula for determining torque (), is
Hence the net torque produced by the two forces is given as a summation of both forces:
b.) The angular acceleration of the disk can be found thus:
using the formula for the Moment of Inertia of a solid disk;
where = Mass of solid disk
and = radius of solid disk
We then relate the torque and angular acceleration () with the formula:
