Answer: 63% of the final charge
Explanation:
When a capacitor is connected to a battery/power supply, the capacitor charges following the exponential law:
where
is the final charge of the capacitor, which is
where C is the capacitance and the potential difference of the battery
t is the time
is the time constant of the circuit
Re-writing the equation,
After a time equal to one time constant,
Therefore the charge on the capacitor will be
Which means 63% of the final charge.
Answer:
The speed off the wheel at the top is 4.57 m/s.
Explanation:
Given that,
A Ferris wheel on a California pier is 38 m high and rotates once every 26 seconds in the counterclockwise direction. 38 m will be the diameter of the wheel. The angular speed of the wheel is given by :
We need to find the speed of the wheel when you are at the very top. So,
So, the speed off the wheel at the top is 4.57 m/s.
<span>Ã sign simply indicates multiplication operation. Thus, we have the following given:
a = acceleration = -2*101 = -202 m/s^2 (Note: negative sign because it opposes the gravitational force)
d = distance/altitude = 9*103 = 927 meters
v = initial velocity = 0 m/s
To solve for the time, we have first the working fomula
d = v*t - 0.5*a*t^2
where: t = time
Substituting,
927 = 0*t-0.5*(-202)*t^2
t = 3.03 seconds
<em>ANSWER: t = 3.03 seconds</em></span>
D. The law of conservation of energy identifies the statement
Answer:
The white dwarf undergoes a catastrophic collapse, leading to a type of supernova that is somewhat different from that which occurs in a massive star but is comparable in energy.
Hope this help:)