Answer: No, the student does not do any work on the wall.
Explanation: The work is defined as the movement of an object done/caused by a force.
And it can be calculated as:
W = F*d
where W is work, F is force and d is the displacement of the object
In this case, the student is applying force on the wall, so we have the first part, but we also know that the wall does not move, so in this case, d = 0, which would imply that the work applied to the wall must be equal to zero
(because W = F*0 = 0)
So the answer is no, the student does not do any work on the wall.
Answer:
(a). The average current flows through the dryer is 12.5 A
(b). The resistance of the dryer is 9.6 Ω
Explanation:
Given that,
Voltage = 120 V
Power = 1500 W
(a). We need to calculate the average current flows through the dryer
Using formula of current
Where, P = power
V = voltage
Put the value into the formula
(b). We need to calculate the resistance of the dryer
Using Ohm's law
Where, I = current
Put the value into the formula
Hence, (a). The average current flows through the dryer is 12.5 A
(b). The resistance of the dryer is 9.6 Ω
When a candle burns, you can't hear the flame, and you can't light a light-bulb with it, so you know that there's no sound energy or electrical energy coming from it.
However, if you've ever actually been around a candle while it's in the act of burning, you may have noticed that you can SEE the flame, and if you put your hand close enough to it, you can FEEL the flame and even burn yourself in it. These observations indicate that while the candle is burning, the chemical energy in it is being converted to light energy and heat energy. (choice-C)