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An electron initially at rest is accelerated between two parallel plates 2.000 cm apart. The space between the plates is a vacuum. The potential difference across the plates is 300.0 V.
What is the electric force on the electron between the plates?
A pendulum bob of length L has its motion interrupted by the peg perpendicularly beneath the support. The bob is released when the string is horizontal. Find out the minimum value for y in order for the bob to swing in a complete circle. State thi..
A 90 kg astronaut and a 1600 kg satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving it a speed of 0.24 m/s directly away from the shuttle.
The Voyager I spacecraft moves through interstellar space with a speed of 7400m/s. Assuming that the 5.6-m long antenna on the spacecraft is at right angles to the magnetic field, find the induced emf between its ends
Several ice cubes (pi = 0.9167 g/cm3) of total volume Vi = 240 cm3, Calculate the amount of heat energy Qm in J needed to melt the ice cubes (Lf = 334 kJ/kg)
A hot (70 C) lump of metal has a mass of 250 gm and a specific heat of .25 cal/gm-C. John drops the metal into a 500 gm calorimeter (specific heat of .10 cal/gm-C) containing 75 g of water at 20 C. Once they reach equilibrium, what will be the fin..
The storage of radioactive waste is a massive problem in the nuclear industry. how much waste will spill over the top if the lid becomes loose
The relative angle of the knee changes from 5 degrees to 85 degrees during the knee flexion phase of a squat exercise. What is the total angular distance covered during 5 squats
A 61 V. battery is connected across a 62600 ohm and a 31700 ohm resistor connected in series. What is the per cent error in the voltmeter reading
Suppose the first stage of a two-stage rocket has total mass 1.30×10^4 kg, of which 1.10×10^4 kg is fuel. The total mass of the second stage is 1000 kg, of which 700 kg is fuel. What is the final speed of the second stage
q1. an ideal gas is expanded isothermally from 20 l to 30 l. throughout this process 6 j of energy is expended by the
A disk-shaped merry-go-round of radius 2.99 and mass 170 rotates freely with an angular speed of 0.623. Calculate the final kinetic energy for this system
What is the magnitude of the external force essential to hold a 2 kg cart motionless at the top of a 2m high incline which is 30 degrees.
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