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A bar of length 2 cm slides along metal rails at a speed of 1 cm/s. The bar and rails are in a magnectic field of 2 T, pointing out of the page. what is the induced emf in the bar and rails?
A space probe with a rest mass of 8.2*10^7kg and a speed of 0.5c smashes into an asteroid at rest and becomes embedded within it. what is the rest mass of the asteroid
A hydrogen atom initially in the ground state absorbs a photon, determine the wavelength and frequency of the photon
What is the annual petroleum consumption of the United States, and where does this petroleum originate? Include all sources supplying a significant fraction of the US consumption (5% or more).
A turntable that spins at a constant 73.0{\rm rpm} takes 3.00{\rm s} to reach this angular speed after it is turned on. Find its angular acceleration
The average speed of the atoms in a 1.6 g sample of helium gas is 651 m/s. Estimate the thermal energy of the sample
A ski starts from rest and slides down a 21degree incline 75m long. what is the ski's speed at the base of the incline
Determine how long it would take an astronaut to fall from a height of 2 meters on the Moon. Compare this time to the time it would take the astronaut to fall the same 2 meters on the Earth. Also, compare the time to the time it would take on the ..
A circular coil of 4 turns and a diameter of 30.0 cm is oriented in a vertical plane with its axis perpendicular to the horizontal component of the Earth's magnetic field. find the horizontal component of the Earths magnetic field
After completing the calculations below, sketch the pH curve for the titration of 25.0 mL of 0.200M solution of a weak acid, HA = (Ka = 6.0 x 10^-7), with 0.200M KOH. Indicate the pH at (a) the beginning of the titration
The mass then travels vertically and it takes 1.10 s for the mass to reach the top of its trajectory. Determine the spring constant, in N/m. (Use g=9.81 m/s2). Assume that the time required for the spring to reach its full extension is negligible.
A ball is thrown 20.0 m/s at an angle of 40.0º with the horizontal. Assume the ball is thrown at ground level. How long does it take the ball to reach the wall
A series RLC ac circuit has a capacitive reactance of 55 ?, and inductive reactance of 25 ?, and a resistance of 40 ?. What is the phase angle of this circuit
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