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Radio waves of very long wavelength can penetrate farther intoseawater than those of shorter wavelength. The U.S. Navecommunicates with submerged submarines using 76 Hz radiowaves. What is their wavelength in air?
A spider hangs from a strand of silk whose radius is5.8x10-6 m.The density of the silk is 1100 kg/m3.When the spider moves, waves travel along the strand of silk at aspeed of 310 m/s. Determine the mass of the spider.
An undersea research chamber for aquanauts is spherical with an external diameter of 4.7 m. calculate the buoyant force on the chamber
A small steel ball bearing with a mass of 11g is on a short compressed spring. When aimed vertically and suddenly released, spring sends the bearing to a height of 1.21 m. compute the horizontal distance the ball would travel if the same spring we..
A coffee filter of mass 1.4 grams dropped from a height of 2 m reaches the ground with a velocity of 0.6 m/s. How much kinetic energy Kair did the air molecules gain from the falling coffee filter.
A horizontal aluminum rod 4cm in diameter projects 5.2 cm froma wall. A 1700kg object is suspended from the end of the rod. Find the vertical deflection on the end of the rod
Water has a density of 1000 kg/m^3. One atmosphere is 1.013 X 10^5 N/m^2. Find the pressure in the upper pipe
A person with perfect pitch sits on a bus bench listening to the 450{\rm Hz} horn of an approaching car. how fast is the car moving
A tire is filled with air at 15°C to a gauge pressure of210kPa. If the tire reaches a temperature of38°C, what fraction of the original air must be removed
q1. a krypton laser produces the cylindrical red laser beam 2.0mm in diameter with 2.0w of power. what is the light
A long, thin, massless rod of length L rotates in a vertical plane about a frictionless pivot point. Find the speed of the mass at the bottom of the swing
A cylindrical glass of water (H2O) has a radius of 4.42 cm and a height of 11.8 cm. How many moles of water molecules are contained in the glass
An explosion of a 10.0-kg bomb releases only two separate pieces the bomb was initially at rest and a 4.00-kg piece travels westward at 100 m/s immediately after the explosion. What are the speed and direction of the other piece
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