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Four point charges have the same magnitude of 2.4 x ten-12C and are fixed to the corners of a square 4.0 cm on a side. Three of the charges are positive and one is negative. Determine the magnitude of the net electric field that exists at the center of the square.
An asteroid has acquired a net negative charge of 128C from being bombarded by the solar wind over the years, How many more electrons does it have than protons
a portable cd player uses a current of 7.50 mA and has a resistance of 465, If the player uses 24-gauge wire (A= 0.20 mm2) with a length of 6.50 cm, what is the resistivity of the wire
You are in a hot air balloon (yes, another balloon problem!) rising from the ground at a constant velocity of 2.70 m/s upward. How long does the cork remain in the air
A popular carnival ride consists of a large, round room that rotates fast enough that any person standing against the wall will be stuck there, even as the floor is dropped away from their feet. What is the room's angular speed in rpm
A 2.50 x 10^-6 F capacitor is charged to 754V and a 6.80 x 10^-6 F capacitor is charged to 563V, Determine the potential difference across the second capacitor
what is the needed magnitude of the minimum acceleration.
An artillery shell is red with an initial velocity of 328 m/s at 51.1 degrees above the horizontal. To clear an avalanche, it explodes on a mountainside 42.1 s after fi ring. What are the (a) x and (b) y coordinates of the shell where it explod..
Two balls, each with a mass of 0.871 kg, exert a gravitational force of 8.23 × 10?11 N on each other. How far apart are the balls
The aire outside a hot-air balloon has a temperature of 17 C. Assume the pressure of the gas inside the balloon is roughly the same with the pressure outside of the balloon. What is the temperature of the air inside the balloon
This time, William Tell is shooting at an apple that hangs on a tree . The apple is a horizontal distance of 20.0m away and at a height of 4.00m above the ground, what is the arrow's initial velocity
A step down transformer is designed to have an output voltage of 19.5 V when the primary is connected to the 120 V. how many turns are in the secondary
An explorer in dense jungles of equatorial Africa leaves his hut. He takes 41 steps at an angle 45 north of east, then 81 steps at an angle 60 north of west, then 51 steps due south. Suppose his steps all have equal length. Save him from becoming ..
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