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WPHY AM Radio transmits on a frequency of 970 kHz, omnidirectionally, with a power of 20 kW. What is its wavelength? You live 13 km from the station. What is WPHY's intensity where you live?
q1. a 245 ball is tied to a string. it is pulled to an angle of 5.20 and released to swing as a pendulum. a student
Two spherical shells have a common center. A -3.00 x10-6 C charge is spread uniformly over the inner shell, which has a radius of 0.050 m. A +4.00 x10-6 C charge is spread uniformly over the outer shell, which has a radius of 0.15 m. Find the magnitu..
How fast should the platform move, v_p, for the person to detect a beat frequency of 7.00 Hz ? Take the speed of sound to be 344 m/s. Express your answer numerically in meters per second.
A wire of resistance 5.4 ? is connected to a battery whose emf ? is 2.0 V and whose internal resistance is 1.0 ?. In 1.8 min, how much energy is dissipated as thermal energy in the wire
An obnoxious brat assigns his 18.7-gram pet mouse Mickey the role of stunt mouse by stuffing him into a spring gun and shooting him up into the air at some angle. How high above his initial location in the gun does Mickey soar
A farsighted man uses eyeglasses with a refractive power of 1.95 diopters. Wearing the glasses 0.02 m from his eyes, What is the correct contact lens prescription, in diopters
A flywheel is spinning with its axle pointing along the east-west direction. You are standing west of the flywheel facing toward it. What is the direction of the flywheel's angular velocity
A charge of - 0.580uC exerts an upward force of magnitude 0.170N on an unknown charge which is a distance of 0.300m directly below it. What is the unknown charge
A uniform rod of mass 3.05×10^-2?2kg and length 0.370m rotates in a horizontal plane about a fixed axis through its center, compute the angular speed of the rod after the rings leave it
A 32g bullet is fired from a rifle at 380 m/s into a water bottle at a pointblank range. The bullet travels completely through the 12 cm long bottle, find the average force exerted by the water on the bullet
One liter of water is 41C is used to make iced tea. How much ice at 0 C must be added to lower the temperature of the tea to 17C? The specific heat of water is 1 cal/g C and latent heat of ice is 79.7 cal/g. Reply in units of g.
A candle of height 2.0 cm is placed 10.0 cm in front of a diverging (concave) lens of focal length -6.0 cm. Where is the image of the candle
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