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An electron is released from rest at the negative plate of a parallel plate capacitor. The plates are separated by a distance of 1.8 × 10-2 m and the charge per unit area on each plate is = 1.9 × 10-7 C/m2. How fast is the electron moving just before it reaches the positive plate?
A photon having E = 25.7 keV energy scatters from a free electron inside a metal. What is the maximum energy the electron can gain from the photon, At which angle will the electron scatter
In a simple atom, the electrons making transitions between outermost energy levels and the innermost energy levels give rise to photons with the reddest colours.
A cart is sitting at the top of an inclined plane; 5.2 m long and meets the horizontal at 12o. Compute the velocity of the cart as it reaches the bottom of the incline
a proton and an alpha particle q 2e m 4 u are fired directly toward each other from far away each with an initial
Chris jumps off a bridge with a bungee cord (a heavy stretchable cord) tied around his ankle as shown in the figure . He falls for 15 before the bungee cord begins to stretch. Chris's mass is 70 kg and we assume the cord obeys Hooke's law, , with k=5..
The task is to design a rocket which will accelerate a payload of mas 100 kg, from a velocity of 0 m/s to 6,000 m/s in intersteller space.
A laser used in a rock concert emits a red light with a wavelength of 721 nm. Calculate the frequency of the light
A sign is supported by a cable and a horizontal beam. The beam has a length 1.4 meter and a uniform mass of12 kilogram. If the cable breaks, find the net torque on the beam the instant thereafter
Consider a swinging pendulum with length l= 10 cm, a mass of 1 gm swinging at the end of it with an amplitude, Calculate the total energy ( potential plus kinetic) in ergs of the swinging pendulum
Two astronauts are, 6.761 m apart in their spaceship, speaking to each other. How far away from the Earth is the spaceship
A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.70 104 m/s, and the radius of the orbit is5.00 106 m. What is the orbital speed of the second satellite
The current density inside a long, solid, cylindrical wire of radius a is in the direction of the central axis and its magnitude varies with radial distance r from the axis according to J = br2, where b is a positive constant.
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