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An intergalactic rock star bangs his drum every 1.30 s. A person on earth measures that the time between beats is 2.30 s. How fast is the rock star moving relative to the earth?
A 100 kg sled is slid across a smooth ice field by a group of four dogs tied to the sled pulling with a 350 N force along a rope at an angle of 20 degrees above the horizontal. (a) If the sled travels at a constant speed, find the drag force on the s..
for a particle in a one demention box, the ground state wave function is: psi=(2/L)^1/2 sin(piX/L), What is the probebility that the particle is in the right-hand half on the box
A Boeing 747 "Jumbo Jet" has a length of 59.7 m. The runway on which the plane lands intersects another runway, How much time is needed for the plane to clear the intersection
A 50 kg pole vaulter running at 10 m/s vaults over the bar. if the vaulter's horizontal component of velocity over the bar is 1 m/s and air resistance is disregarded, how high was the jump.
A glider with mass m = 0.240 kg sits on a frictionless horizontal air track, connected to a spring with force constant k= 5.00 N/m. What must the initial displacement of the glider be if its maximum speed in the subsequent motion is to be 3.00 m/s
The polar ice caps contain about 2.3×?10?^19 kg of ice. Estimate the change in the length of the day that would be expected
what are the currents that the block can carry.
What is the magnitude of the magnetic field. Evaluate this to the tension as the boat is raised and held at rest so the angle becomes 25 degrees.
A flywheel has a constant angular deceleration of -2.01 rad/s^2. Find the time required for the flywheel to come to rest
a uniform electric field of magnitude 200 vm is directed in the negative x direction. a 10.7 muc charge moves from the
An object is located 19.0 cm in front of a convex mirror, the image being 7.73 cm behind the mirror. How far in front of the mirror is the second object located
A string is wrapped tightly around the circumference of a wheel with a mass of 1.23kg and a radius of .324m. What is the moment of inertia of the wheel
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