Answer:
ω' = 0.815 rad/s
Explanation:
Given,
R = 1.20 m
Inertia of merry-go- round= 240 kg.m²
Rotating speed = 9 rpm =
=0.9424 rad/s
mass of the child, m = 26 kg
angular speed of the merry-go-round=?
we know
Angular momentum, L = I ω
Moment of inertia of the child
I' = m r² = 26 x 1.2² = 37.44 kgm²
Conservation of angular momentum
initial angular momentum = Final angular momentum
I ω = (I+I')ω'
240 x 0.9424 = (240+37.44) ω'
226.176= 277.44 ω'
ω' = 0.815 rad/s
new angular speed of the merry-go- round is equal to 0.815 rad/s
Answer:
<h3>its c(Norfolk is less humid and has higher precipitation than San Francisco</h3>
Explanation:
Yes it does:
While the ball is in motion and hits the wall it'll resist it's change is motion and won't stop immediately
Answer:
The resistor has a resistance of 10.667 ohms.
Explanation:
By Ohm's Law, voltage (), in volts, is directly proportional to the current (), in amperes, and by definition of power (), in watts, we have the following formula:
(1)
Where is the resistance, in ohms.
If we know that and , then the resistance of the resistor is:
The resistor has a resistance of 10.667 ohms.
Answer:
a) Energy stored in the capacitor,
b) Q = 45 µC
c) C' = 1.5 μF
d)
Explanation:
Capacitance, C = 1 µF
Charge on the plates, Q = 45 µC
a) Energy stored in the capacitor is given by the formula:
b) The charge on the plates of the capacitor will not change
It will still remains, Q = 45 µC
c) Electric field is non zero over (1-1/3) = 2/3 of d
From the relation V = Ed,
The voltage has changed by a factor of 2/3
Since the capacitance is given as C = Q/V
The new capacitance with the conductor in place, C' = (3/2) C
C' = (3/2) * 1μF
C' = 1.5 μF
d) Energy stored in the capacitor with the conductor in place