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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 nucleus of the hydrogen atom has a radius of about 1.1x10^-15 The electron is at a distance of about 5.29 Ã- 10-11 m from the nucleus. compute the volume of the atom
A child is sitting on the outer edge of a merry-go-round that is 18m in diameter. if the merry-go-round makes 5 rev/min, what is the velocity of the child in m/s
A placekicker must kick a football from a point 36.0 m (about 40 yards) from the goal. By how much does the ball clear or fall short of clearing the crossbar
The suspension cables on the Brooklyn Bridge are 15.75 in. diameter wire ropes. Estimate the total drag force on one of the cables in a 40 mph wind if the length of one cable is about 3000 ft and the air temperature is 70o F.
You slip a wrench over a bolt. Taking the origin at the bolt, theother end of the wrench is at x = 18 cm, y = 5.5 cm. What is the torque on the bolt
The pressure at the bottom of a tube is 1500 Pa. Petroleum (d=800 kg/m cubic) floats on 10 cm of water (d=1000 kg/m cubic). What is the depth of the layer of petroleum
A 15 kg block is accelerated at 2.0 m/s2 up a frictionless plane inclined at 5.0° to the horizontal, with the speed increasing from 10 m/s to 24 m/s. What is the change in the block's mechanical energy
After 803 rev/min is achieved, the motor is disengaged. A friction brake is used to slow the rotational rate to 351 rev/min. Illustrate what is the magnitude of the energy dissipated as heat from the friction brake?
The average density of the planet Neptune is 1644 kg/m3. The acceleration of gravity on its surface is 11.32 m/s2. Calculate the average radius of Neptune
Two disks are rotating about the same axis. Disk A has a moment of inertia of 3.67 kg·m2 and an angular velocity of +3.04 rad/s. What is the moment of inertia of disk B
.250 kg ball is dropped to the floor from a height of 1.0 m and upon rebounding, reaches a height of .60 m. What is the impulse delivered to the ball by the floor?
The rectangular metal loop in following figure has a resistance of 2? except the 0.5W, 0.1A bulb attached to it. What is the direction of current flow
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