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Question1
An electron moves to the right with a speed of 0.82c relative to laboratory frame. A proton moves to the left with a speed of 0.77c relative to the electron. Find out speed of the proton relative to the laboratory frame.
Question2
A 120g granite cube slides down a 40 frictionless ramp. At the bottom, just as it exits onto a horizontal table, it collides with a 265g steel cube at rest. How high over table have to the granite cube be out to give the steel cube a speed of 160cm/s?
Question3
A retired bank president can simply read the ?ne print of the ?nancial page while the newspaper is held no closer than arm’s length, 57.9 cm from eye.
What must be the focal length of an eyeglass lens that will let her to read at the more secure distance of 26.3 cm? Answer should be in units of cm.
The naturally occurring charge on the ground on a fine day out in the open country is -1.00 nC/m2. Calculate the electric potential at this height
Find out all intermediate results to at least four-digit accuracy to minimize roundoff error. m/s2 direction 3° from the direction of velocity towards center of the circle
Determine the smallest thickness of the shaft if the allowable shear stress is ?allow=150MPa and the shaft is restricted not to twist more than 0.08rad
One of the 57.5cm -long strings of an ordinary guitar is tuned to produce the note B3(frequency 245 Hz) when vibrating in its fundamental mode. Find the speed of transverse waves on this string
What is the speed of the projectile immediately before it hits the ground if air friction does one and a half times as much work on the projectile when it is going down as it did when it was going up.
A 1.15-k? resistor and a 590-mH inductor are connected in series to a 1250-Hz generator with an rms voltage of 13.1V, What is the rms current in the circuit
A closed box is filled with dry ice at a temperature of ?78.4 °C, while the outside temperature is 22.8 °C. Find the thermal conductivity of the material from which the box is made
A box stands against the wall of a cylinder that is rotating. The cylinder has a radius of 30cm. What is the minimum consant speed (magnitude of linear velocity) the box must move so it doesn't slip
Two equally charged, 1.00 {\rm g} spheres are placed with 2.00 {\rm cm} between their centers. What is the magnitude of the charge on each sphere
A cubic centimeter in a typical cumulus cloud contains 50 to 500 water drops, which have a typical radius of 10 µm. How much mass does the water in the cloud have
a 15 g rubber bullet hits a wall with a speed of 150 m/s. What force did the wall apply to the bullet
What minimumdistance are they from each other? The angle may be too large to use small angle approximation. suppose in units of m.
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