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A 0.800-kg particle has a speed of 1.30 m/s at point (A) and kinetic energy of 8.00 J at point (B).
(a) What is its kinetic energy at(A) ?
(b) What is its speed at(B) ?
(c) What is the net work done on the particle by external forces as it moves from (A)to(B) ?
a 2.0 mm diameter gold ball is charged to 56 nc. what fraction of its electrons have been removed? the density of gold
A car speeds past a stationary police officer while travelling 115km/h. The officer immediately begins pursuit at a constant acceleration of 10.20 km/h/s (note the mixed units), just as the driver passes the officer.
An electron is in a certain energy state in a one-dimensional, infinite potential well from x = 0 to x = L = 200pm. What is the frequency of the photon that is emitted
You look at yourself in a shiny 8.4-cm-diameterChristmas tree ball. If your face is 21.0cm away from the ball's front surface, where is your image? Follow the sign conventions. Is it real or virtual
A tube is open only at one end. A certain harmonic generted by the tube has a frequency of 470Hz. The next higher harmonic has a frequency of 555Hz. The speed of sound in air is 343m/s.
the cable on an elevator of mass m snaps and two safety mechanisms come into play. emergency brakes apply a constant
q1. driving in your car with a constant speed of 13 ms you encounter a bump in the road that has a circular cross
A 0.250 kg ball attached to a string s being swung in a vertical circle, like a roller coaster doing a loop-de-loop, with a radius of 1.15 m. What is the minimum speed at the top of the circle to keep the string from going slack
two polarizers are oriented at 72 degress to one another. Unpolarized light falls on them. What fraction of the light intensity is transmitted
A certain lightbulb has a tungsten filament with a resistance of 19.1 ? when at 20.0°C and 139 ? when hot, Find the temperature of the hot filament
suppose a beam of 5.0 ev protons strikes a potential energy barrier of height 6.0 ev and thickness 0.58 nm at a rate
resistance to the motion of an automobile consists of road friction which is almost independent of speed and air drag
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