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A particular Bohr orbit in a hydrogen atom has a total energy of -0.85eV.
What is the kinetic energy of the electron in this orbit?
K=______________eV
& What is the electric potential energy of the system?
U=______________eV
A solid aluminum cylinder with density equal to 2700 kg/m3 has the weight equal to 0.66 N in air and the apparent weight of 0.22 N when immersed in an unknown liquid. What is the density of this liquid
If the heavier fragment lands back at the equal point from which the shell was launched, where will lighter fragment land and how much energy was released in the explosion.
An object is placed 6.00cm to the left of a converging lens of focal length 8.00 cm. obtain the position of the final image
A 68 kg person sits on a 4.0 kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.2 cm in diameter . Find the pressure exerted on the floor by each leg of the chair, assume the weight is evenly distributed.
Suppose a ping-pong ball and a bowling ball are rolling toward you with the same momentum, and you exert the same average force in stopping each of them.
calculate the total mechanical energy of the glider at any point in its motion. Calculate the maximum speed of glider.
15. An object weighing 300 N in air is immersed in water after being tied to a string connected to a balance. The scale now reads 265 N. find the density of the object
An airplane travels x = 4.50 x 10^2 km due east and then travels an unknown distance y due north. Finally, it returns to its starting point by traveling a distance of r = 525 km. How far did the airplane travel in the northerly direction.
A simple pendulum is made from a L long string and a small ball, mass=m, attached to its free end, Write the lenght of the curve s(t) and specify the time period for small oscillations
At what angle should a curve of radius 190 m be banked, so cars can travel safely at 32 m/s without relying on friction?
A 22.5 g bullet is fired from a rifle. It takes 2.60 10-3 s for the bullet to travel the length of the barrel, find the average net force exerted on the bullet
Two point charges, +5.0 µC and ?3.0 µC, are separated by 4.0 m. What is the electric potential energy?
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