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Suppose that a disk rotates through five revolutions in 4 seconds. What is the angular rotational velocity
a typical hard drive in a computer spins at 5400rpm. what is the period in seconds
A flywheel having constant angular acceleration requires 4.30 to rotate through 166. Find the angular acceleration of the flywheel
For an atom (mythical), there are three possible energy levels between which an electron can jump
A pump is used to send oil (density 800 kg/s) through a hose the diameter of which is 5 times that of the nozzle through which the water exits. what is the gauge pressure of the oil in the pump
n unmarked police car traveling a constant 95 km/h is passed by a speeder traveling 130 km/h. how much time passes before the police car overtake the speeder
An ?-particle has a charge of +2e and a mass of 6.64 × 10-27 kg. find the magnitude of the magnetic force on it
In a lightning bolt, a large amount of charge flows during a time of 2.9 x 10-3 s. Assume that the bolt can be represented as a long, How much charged has flowed during the lightning bolt?
The equation of a transverse wave on a string is y = (6.1 mm) sin[(30 m-1)x + (300 s-1)t], What is the wave speed
The function y(x, t) = (25.0 cm) cos(?x - 26?t), with x in meters and t in seconds, describes a wave on a taut string. What is the transverse speed for a point on the string at an instant
Suppose that a simple pendulum consists of a small 61 g bob at the end of a cord of negligible mass. find the pendulums maximum kinetic energy
A carpenter is driving a nail into a board. The 1.25 kg hammer moves at 8.85 m/s when it strikes the nail. find the increase in temperature of the nail after 3 blows from the hammer
A fisherman accidentally steps off the ledge of a 4.0 meter-high dock and falls into the lake below the dock. what is the fisherman's speed on entering the water
A carpenter is driving a nail into a board. The 1.25 kg hammer moves at 8.85 m/s when it strikes the nail. What is the change in length of the nail
An electron moving to the right at 1.0% the speed of light enters a uniform electric field parallel to its direction of motion. what direction is required for the electric field
Two point charges are placed on the x-axis. A charge -q is located at the origin, and a charge -2q is located at x = +d. at what location is the total electric potential zero
student is running at her top speed of 5.2m/s to catch a bus, which is stopped at the bus stop. For what distance does she have to run in that case
Apply Newton's second law to the elevator and find the maximum upward acceleration for the elevator if the cables are not to break? Please Help Guys
A 224-? and a 211-? resistor are connected in series across an unspecified power supply. what is the exact current (in A) through the 211-? resistor
A small coil has a cross section of 5.5 cm2 and consists of 8 turns of wire. If the loop carries a current of 180 mA, what is the torque required to hold the loop
A driver traveling at 72 km/hr sees an animal dash out onto the road and slams on the brakes. What was the driver's reaction time
Three ships leave a spacestation at nearly the same time. As seen by a spacestation observer, Find the speed and direction of ships 2 and 3
A pion has a rest energy of 135MeV. It decays into two gamma rays, bursts of electromagnetic radiation that travel at the speed of light. find the energies of the two gamma rays
What relationship can you infer about the directions of the electric field lines and equipotential lines, What is the potential of the conductor
A rifle is aimed horizonatally at a target 50 m away. The bullet hits the target 2.0cm below the aim point. what was the bullets speed as it left the barrel