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A mixture of ordinary hydrogen atom and tritium, a hydrogen isotope whose nucleus is approximately 3 times more massive than ordinary hydrogen, is excited and spectrum is observed . How far in wavel
Find the force necessary to start the crate moving, given that the mass of the crate is 32 and the coefficient of static friction between the crate and the floor is 0.57.
Take a ride on the Physics Phantasm, the newest frictionless roller coaster at Six Phlags. The ride starts off from rest with a steep drop from 41.0 m up, followed by a vertical loop on a track with
A model-train transformer plugs into 120-V ac and draws 0.30 A while supplying 8.5 A to the train. Part A: What voltage is present across the tracks? Assume 100% efficiency.
A 47.0 g golf ball is driven from the tee with an initial speed of 52.0 m/s and rises to a height of 25.2 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest poin
Relative to the ground, what is the gravitational potential energy of a 62.0 kg person who is at the top of the Sears Tower, a height of 443 m above the ground?
What is the total magnitude I initial of the magnetic flux through the coil before it is rotated?
A skier slides horizontally along the snow for a distance of 12 m before coming to rest. The coefficient of kinetic friction between the skier and the snow is µk = 0.080. Initially, how fast w
A 0.073 kg arrow is fired horizontally. The bowstring exerts an average force of 75 N on the arrow over a distance of 0.90 m. With what speed does the arrow leave the bow?
What recoil velocity does she acquire in response to a single shot from a stationary position, assuming that no external force keeps her in place?
Suppose you are riding a stationary exercise bicycle, and the electronic meter indicates that the wheel is rotating at 8.2 rad/s. The wheel has a radius of 0.60 m. If you ride the bike for 2150 s, h
In 9.5 s a fisherman winds 2.1 m of fishing line onto a reel whose radius is 3.0 cm (assumed to be constant as an approximation). The line is being reeled in at a constant speed. Determine the angul
An auto race is held on a circular track. A car completes one lap in a time of 20.5 s, with an average tangential speed of 47.5 m/s. Find the following. (a) the average angular speed
At the local swimming hole, a favorite trick is to run horizontally off a cliff that is 7.1 m above the water. One diver runs off the edge of the cliff, tucks into a "ball," and rotates on the way d
After 10.0 s, a spinning roulette wheel at a casino has slowed down to an angular velocity of +1.72 rad/s. During this time, the wheel has an angular acceleration of -5.05 rad/s2. Determine the angu
(a) How much time does it take for the bike to come to rest? (b) What is the angular acceleration of each wheel?
A basketball player is balancing a spinning basketball on the tip of his finger. The angular velocity of the ball slows down from 20.0 to 13.9 rad/s, during the slow down the angular displacement is
An electric circular saw is designed to reach its final angular speed, starting from rest, in 1.40 s. Its average angular acceleration is 325 rad/s2. Obtain its final angular speed.
A circular coil of wire with cross-sectional area of 0.033 m2 is exposed to a uniform magnetic field that is perpendicular to the plane of the coil. The magnetic field magnitude decreases from 0.56
An RCL series circuit has a 18-ohm resistor, a 0.050-H inductor, and a 1.5x10-4 F capacitor. The generator has an rms voltage of 240 volts. What is the rms current in the circuit when the generator
When an 83.0-kg adult uses a spiral staircase to climb to the second floor of his house, his gravitational potential energy increases by 2.10 x 103 J. By how much does the potential energy of a 25.0
A layer of diamond (n = 2.417) lies on top of a layer of sapphire (n = 1.797). What is the critical angle for total internal reflection between these two layers?
A horizontal wire that is 4.4 m long is exposed to a uniform external magnetic field of magnitude 79 mT (millitesla). The external field is directed at an angle of 39o below the horizontal. The magn
A circular coil of wire carries a current of 22 A. The radius of the loop is 9.0 cm, and the magnitude of the magnetic field at the center of the loop is 6.0 mT (millitesla). How many turns does the
A farsighted man has a contact lens prescription of +2.8 diopters, enabling him to see items in focus when they are no closer to his eyes than 28 cm. What is his near point when he is not wearing th