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Lightning strikes a point on earth, delivering 20.0 C of charge from cloud to earth across a potential difference of 1.00 108 V.
(a) Is the cloud or the earth at the higher potential?
(b) How much energy is delivered to the ground?
(c) If this energy could be used to light a 100 W light bulb, how long would it last?
A flywheel rotates at 7200 rev/min when the power is suddenly cut off. How many revolutions does the flywheel makes before coming to rest
When a nerve cell depolarizes, charge is transferred across the cell membrane, changing the potential difference. For a typical nerve cell, 9.0 pC of charge flows in a time of 0.50ms . 1. What is the average current? Express your answer to two sig..
A motorcycle has a constant speed of 25.0 m/s as it passes over the top of a hill whose radius of curvature is 118 m, Find the centripetal force that acts on the cycle
The inner and outer surfaces of a cell membrane carry a negative and positive charge, respectively. Because of these charges, a potential difference of about 0.077 V exists across the membrane. The thickness of the membrane is 8.1 x 10-9 m. What i..
A spring has a force constant of 323 N/m and an unstretched length of 6 cm. One end is attached to a post that is free to rotate in the center of a smooth table, as shown in the top view below. The other end is attached to a 4-kg disk moving in un..
A radio station broadcasts at a frequency of 92.0 MHz with a power output of 51.8 kW. what is the energy of each emitted photon
q1. a diatomic gas molecule has a mass of 2.01 x 10-26 kg and a rotational inertia of 3.37 x 10-46 kgbullm2 about an
In a "Rotor-ride" at a carnival, people pay money to be rotated in a vertical cylindrically walled "room." what is the minimum coefficient of static friction so that the people will not slip down
A resistor (R = 900 ?), a capacitor (C = 0.25 µF), and an inductor (L = 4.0 H) are connected in series across a 240 Hz AC source for which ?Vmax = 100 V. estimate the phase angle between the current and voltage
A horizontal spring with k = 72N/m has one end attached to a wall and the other end free. find maximum spring compression
Charges of 6.0 uC are placed at corners of a square that has sides of 2.0cm. Find the magnitude and direction of the force on the charges
Christian is making a Tyrolean traverse as shown in the figure. That is, he traverses a chasm by stringing a rope between a tree on one side of the chasm and a tree on the opposite side, 23m away.determine the tension force in the rope
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