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1. You are at a concert, sitting 90 yards from the stage. The temperature is 20°C. A friend is watching the concert on television, and they are 1200 miles away.
a. How long does it take for the sound to reach you?
b. How long does it take the broadcast to reach your friend?
A 60 kg skier starts from rest at a height of H = 21 m above the end of the ski-jump ramp. As the skier leaves the ramp, his velocity makes an angle of 28° with the horizontal. avoid the effects of air resistance and assume the ramp is frictionles..
A certain telescope has an objective of focal length 1560 cm. If the Moon is utilized as an object, a 1.4 cm long image formed by the objective corresponds to what distance, in miles, on the Moon? Assume 3.8 multiplied by 108 m for the Earth-Moon dis..
A wheeled cart with a mass of 0.50 kg is rolling along a horizontal track at a constant velocity of 2.0 m/s when it experiences an elastic collision with a second identical cart that is initially at rest, What is each card doing after the second co..
A person sitting in a stationary boat notices the waterwaves passing by the bow of the ship once every 4 seconds. At what speed are the water waves moving
A constant 60-N force acts on a4.00 kg box. The box initially is movingat 20 m/s in the direction of the force, and 3.0 s seconds laterthe box is moving at 65 m/s. Determine both the work done by this force and the average power delieveredby the forc..
A piece of wire carries a current I along the x-axis and sits in a magnetic field with field lines in the y-direction. What is the direction of the Lorentz Law
A hydrogen atom is in the ground state. It absorbs energy and makes a transition to the n = 5 excited state. The atom returns to the ground state by emitting two photons, one in dropping to n = 4 state, and one in further dropping to the ground state..
9.0 volts are sent into a transformer with a 10 coil primary loop and a 30 coil secondary loop. What is the voltage leaving the secondary loop
A small current element located at the origin has a length of 2.00 mm and carries a current of 2.0 A in the +z direction. Find the direction and magnitude of the magnetic field due to this current element at the point (0.0, 0.3m, 0.3m)
Ice of mass 48.5 g at -10.3° C is added to 188 g of water at 14.2° C in a 108 g glass container of specific heat 0.200 cal/g-°C, obtain the final temperature of the system
In Rutherfords famous scattering experiments thats led to the planetary model of the atom, How close does the alpha particle get to the gold nucleus before turning around
A firecracker resting on a level street explodes into three pieces of equal mass. Immediately after the explosion, the first piece is moving north at 125 m/s, and the second piece is moving east at 75.0 m/sec. What is the velocity of the third piece ..
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