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1. The plates of a parallel-plate capacitor are 5 mm apart. The area of each plate is 102x10^-4 m^2. A potential difference of Vo= 75V is applied between the plates. The plates are filled with a dielectric with constant of k=2.7
a) What is the capacitance C0 before the dielectric slab is inserted?
b) What free charge appears on the plates?
c) What is the capacitance after inserting the dielectric?
d) What is the potential difference V between the plates after the slab has been introduced?
2. A 120-V fish tank heater has a power rating of 112 W.
a) Calculate the current through the heater
b) Calculate the resistance of the heater
c) Find the total electric energy transformed if the heater was turned on for half hour.
The edge of a cube consist of equal resistors of resistance R, that are joined at the orners, let a battery be connected to two opposite corners of a face of cube. what is the efective resistance.
The equation of a transverse wave traveling in a string is given by y=A sin(k x??t). The tension in the string is 18.0 N, A = 1 mm, k = 22 rad/m, ? = 325 rad/s. What is the linear density of the string. I have the speed of the wave but i cant get ..
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Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 13.0 m/s at an angle 52.0 degrees; with respect to the horizontal. Sarah catches the ball 1.5 meters above the gr..
A player kicks a ball from ground level with an initial velocity of 27.00 m/s at 30 degrees above the horizontal. What is the ball's range to one decimal place
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