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A quarterback throws a football to a stationary receiver 31.5m away from him. If the football is thrown at an initial angle of 40° to the ground, at what initial speed must the quarterback throw the ball for it to reach the receiver?
Suppose you have a 12.0 V car battery that can move 45 525 C of charge, and a 12.0 V motorcycle battery that can move 3250 C of charge. How much energy does each deliver?
An electrician experienced a mild shock when he accidentally touched a wire carrying 5.0 A for 1.5 s.
a.) How many coulombs of charge flow through the electrician?
b.) How many electrons constitute the given current?
A closely wound 0.20m × .20 m square coil of 100 turns is exposed to an external magnetic field of 0.74 T that is perpendicular to the plane of the coil. The coil is then rotated for 10 s until it makes 60 degrees with the magnetic field. Find the average induced electromotive force during the 10 s interval.
A rectangular surface of length 3.25 cm and width 5.25 cm lies on the x-z plane at y=0. What is the flux through this surface due to a uniform magnetic field of 0.65 T directed 60° from the +x-axis?
Two parallel plates have equal and opposite charges. When space
was evacuated, the electric field was 2.80 x 105 V/m. When it
was filled with a dielectric material, the electric field was 1.20 x
105 V/m. What is the dielectric constant? What is the material?
If the value you computed has an SI unit of 𝐶²m²/kgm², the quantity could be
a. potential difference c. electric field
b. dielectric constant d. capacitance
A parallel-plate capacitor has a capacitance C. What is the new
capacitance if a dielectric with K = 4 is inserted between its plates?
a rock is thrown horizontally from the top of a cliff 88m high, with a horizontal speed of 25m/s. with what velocity does the rock hit?
A car travels 65.5 km North after an an hour and three-quarters. Calculate the velocity of the car?
#331389 on Nov 2022