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You throw a ball torwards a wall at speed 21 m/s and an angle of 40 degrees above the horizontal. The wall is 22.0 m from the release point of the ball.a) How long does the ball take to reach the wall?b) How far above the release point does the ball hit the wall?c) What are the horizontal and vertical components of its velocity as it hits the wall?
A heater coil connected to a 220V ac line has a resistance of 42.1Ohm. What is the average power used, What is the maximum value of the instantaneous power
A 330g airtrack cart on a horizontal air track is attached to a string that goes over a pulley with a moment of inertia of 5.00*10^-6 kg*m^2 and a radius of 1.35 cm. Write newtons second law for each of the three objects
Two sounds differ in intensity level by 4.62 dB. What is the ratio of the intensities of these two sounds? (Let I1 be the intensity of the first (higher) sound and I2 be the intensity of the second (lower) sound.)
A car is driving directly north on the freeway at a speed of 117 km/h and a truck is leaving the freeway driving 76 km/h in a direction that is 40° west of north. What is the velocity of the truck relative to the car?
A size-5 soccer ball of diameter 22.6cm and mass 426g rolls up a hill without slipping, reaching a maximum height of 5.00m above the base of the hill. How much rotational kinetic energy did it then have
A string passing over a pulley has a 3.70 kg mass hanging from one end and a 2.60 kg mass hanging from the other end. What is the average frictional torque acting on the pulley
A block and a gun are firmly affixed to opposite ends of a long glider mounted on a frictionless air track. find the mass of the gun-glider-block system
A diving board of length 3 is supported at a point 1 from the end, and a diver weighing 480 stands at the free end. The diving board is of uniform cross section and weighs 295.
You are driving along a highway at 25 m/s when you hear the siren of an emergency vehicle traveling in the opposite direction on the other side of the highway. What is the speed of the vehicle
A note played on a piano is 4719 Hz. If the speed of sound is 347 m/s, what is the wavelength of the note?
Find the acceleration of the aircraft and express it in multiples of g, free fall acceleration.
Determine the net Force (magnitude and direction) acting on wire 3 due to wires 1 and 2 for currents of 10A. Each wire has a horizontal length of 50 cm and each wire is seperated by a distance of 2 cm
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