Answer:
R2 = 10.31Ω
Explanation:
For two resistors in parallel you have that the equivalent resistance is:
(1)
R1 = 13 Ω
R2 = ?
The equivalent resistance of the circuit can also be calculated by using the Ohm's law:
(2)
V: emf source voltage = 23 V
I: current = 4 A
You calculate the Req by using the equation (2):
Now, you can calculate the unknown resistor R2 by using the equation (1):
hence, the resistance of the unknown resistor is 10.31Ω
<span>The answer is:
PE lost every second = mgh = 1.2x10^6 * 9.81 * 50 = 5.89x10^8J
So, Power = 5.89x10^8W</span>
Answer:
the bell has potential energy equal to,
18 x 9.8 x 45 = 7938 joules
For the same wave, the product product of
(wavelength) times (frequency)
is always the same number. (It happens to be the speed of the wave.)
So if one of them changes, the other one has to change in the opposite
direction, in order to keep their product constant.
For electromagnetic waves, higher frequency means higher energy.
I'm not sure about mechanical waves just now.
Answer:
Assuming no air friction,
the time it takes to fall 10 m = t = √2h/g = √(20/9.8) = 1.43 s
horizontal distance = 5 m
horizontal speed = distance/time = 5/1.43 = 3.5 m/s ANS
Explanation:
i hope this helps!