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A 1.0 µC point charge and a 7.0 µC point charge are a distance L apart. Where must a third point charge be placed so that the electric force on that third charge is zero? (Utilize the following as necessary: L.)
A tennis ball of mass 57.0 g is held just above a basketball of mass 590 g. With their centers vertically aligned, both balls are released from rest at the same time, to fall through adistance of 2.00 m.
To help keep her barn warm on cold days, a farmer stores 900 kg of warm water in the barn. How many hours would a 3.50-kilowatt electric heater have to operate to provide the same amount of heat as is given off by the water as it cools from 20.0 C to..
An extension cord made of two wires of diameter 0.129 {rm cm} (no. 16 copper wire) and of length 1.5 m (5 ft) is connected to an electric heater which draws 13.5 A on a 120-{rm V} line. How much power is dissipated in the cord.
A swing is made from a rope that will tolerate a maximum tension of 1.0 * 10^3 N without breaking. What is the mass of the heaviest person who can ride the swing
On an unknown planet with radius 1000km a future astronaut drops a rock from his hand 2m off the ground. The rock takes 2s to reach the ground. What speed did the cannon launch the ball
Waves travel along a 100-m length of string with a mass of 55 g, which is held taut by a tension of 75 N. What is the speed of the waves
Two speakers, one directly behind the other, are each generating a 245-Hz sound wave. What is the smallest separation distance between the speakrs
An air parcel occupied by an ideal gas (T1 = 255 K, V1 = 1500m3, m1 = 1680 kg) collides and mixes with a second air parcel occupied by a second ideal gas (T2 = 280 K, V2 = 1200 m3, m2 = 1392 kg). Assuming the specific heat capacities of the gases ..
Three resistors having resistances of R1=1.54ohms, R2=2.37ohms, and R3=4.78ohms respectively, Which resistor dissipates the most power and why
What is the Lens Equation? What do o, i and f stand for in the equation and what are the five parts of the Optical Bench used in this experiment? Briefly describe what each part does.
A helicopter rises vertically, carrying a load of concrete to make the foundation for a ski lift. Find what is the helicopter acceleration
The record for the highest speed achieved in a laboratory for a uniformly rotating object was 2.01e3m/s for a 0.15m long carbon rod
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