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An electron is accelerated from rest through a potential difference 1200 V. Give the electron's kinetic energy after this acceleration in electron-volts and in joules.
A perfectly reflecting flat mirror is uniformly illuminated by light striking it perpendicularly. Calculate the intensity of the light
A current of 13.9 A flows through an electric heater operating on 120 V. What is the heater's resistance
Galaxy A is moving away from us with a speed of 0.80c relative to the earth. How fast is galaxy A moving according to an observer in galaxy B
1. how would the positions of the maxima and minima change if this experiment were done under water? justify your
A student of weight 658 N rides a steadily rotating Ferris wheel (the student sits upright). At the highest point, the magnitude of the normal force FN on the student from the seat is 545 N. What is the magnitude of FN at the lowest point
the three displacement vectors in the drawing have magnitudes of a 3.73 m b 4.62 m and c 5.20 m. find the resultant
a 0.39 kg piece of putty is dropped from a height of 2.7 m above a flat surface. when it hits the surface the putty
On days of fair weather, the atmospheric electric field of the Earth is about 116 N/C; What is the surface charge density on the ground
The passengers in a roller coaster car feel 50% heavier thantheir true weight as the car goes through a dip with a 40.0 m radius of curvature. What is the car's speed at the bottom of the dip
A simple 2.00 m long pendulum oscillates in a location where g= 9.80 m/s2. What is the period of motion for this pendulum
what will be the energy of eht photo emitted eleectron kiked of from n2 orbital of the sodium atom by photons with
A rectangular block of glass is totally immersed in water (n = 1.33). What is the refractive index of the glass
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