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A sound wave traveling in air at 78°C has a frequency of 816 Hertz.
(a) Compute what is the wave speed?
____________m/s
(b) Compute what is the wavelength?
____________cm
Birds resting on high-voltage power lines are a common sight. The copper wire on which a bird stands is 2.5 cm in diameter and carries a current of 55 A. If the bird's feet are 3.9 cm apart, calculate the potential difference between its feet. (Th..
A series RLC circuit consists of a 90Ohm resistor, a 0.20H inductor, and a 105mF capacitor. It is attached to a 120V/60Hz Power line. compute the average power loss
A sailboat on the ocean has a mast of height 18.5 m. When viewed through a pair of binoculars the mast has an angular size of 0.065 rad. compute the distance between the observer and the sailboat
A car is traveling down around a banked curve in the road. The curve has a radius of 300 m and is banked at an angle of10.0o. (a) At what speed is no friction required? (b)Suppose it is snowing and the coefficient of friction is 0.2, what are the ..
Sherlock Holmes examines a clue by holding his magnifying glass (with a focal length of 15.0 cm) 10.0 cm away from an object. Find the image distance and the magnification. explain the image that he observes.
An electrically neutral thin, square metal slab, measuring 6.00cm on a side is placed in a uniform external field that is perpendicular to its square area. What is the total charge on the negative side of the slab
A submarine is 315 m horizontally out from the shore and 128 m beneath the surface of the water. A laser beam is sent from the submarine so that it strikes the surface of the water at a point 225 m m from the shore. If the beam strikes the top of a b..
A child makes a "raft" by inserting a pin perpendicularly into the flat surface of a cork with diameter D. What is the maximum height h of the pin if its tip is completely hidden from view when observed from above the surface of the water
Electrons in a photoelectric-effect experiment emerge from a copper surface with a maximum kinetic energy of 1.10 eV
A 2.00 x 102 N force is pulling an 80.0 kilogram refrigerator across a horizontal plane. The force acts at an angle of 24.0 degree above the plane. Calculate the work done by the pulling force
"A horizontal force of 5.0N pushes a .50kg block against a vertical wall. the block is initially at rest. If mu s = .60 and mu k =.80 then the frictional force is?
A rifle is aimed horizontally at a target 1,699.92 m away. The bullet hits the target 2.18 inch below the aim point. determine the bullets time of flight
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