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A boat is traveling upstream at 14 km/h with respect to thewater of a river. The water itself is flowing at 9 km/h withrespect to the ground.
a.) What is the velocity of the boat with respect to theground?
b.) A child on the boat walks from front to rear at 6 km/hwith respect to the boat. What is the child's velocity with respectto the ground?
A capacitor (capacitance C1) is connected across the terminals of an ac generator. Without changing the voltage or frequency of the generator, a second capacitor (capacitance C2) is added in series with the first one.
The ropes in the figure are each wrapped around a cylinder, and the two cylinders are fastened together. What is the angular acceleration of the cylinders
Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 12.0 m/s at an angle 46.0 degrees; What is the distance between the two girls
Two ice skaters, with masses of 50.0kg and 75.0kg , are at the center of a 40.0m -diameter circular rink. The skaters push off against each other and glide to opposite edges of the rink. If the heavier skater reaches the edge in 40.0s , how long does..
A solid cylinder of mass 3 kg and radius 0.2 m starts from rest at the top of a ramp, inclined 15°, and rolls to the bottom without slipping. (For a cylinder I = 0.5MR2) The upper end of the ramp is 1.2 m higher than lower end. Find the linear sp..
A stamp collector uses a lens with 7.5-cm focal length as a simple magnifier. The virtual image is produced at the normal near point (25 cm). What is the expected angular magnification
A uniform crate with a mass of 17.3 kg rests on a horizontal floor with a coefficient of static friction between the crate and the floor (?s) of 0.513. What horizontal force applied to the top of the crate
A radio receiver can detect signals with electric field amplitudes as small as 250?V/m. What is the intensity of the smallest detectable signal
Whenever two Apollo astronauts were on the surface of the Moon, a third astronaut orbited the Moon. Determine the period of the orbit
An iron-core solenoid is 43cm long and 1.7cm in diameter, and has 720 turns of wire. What is the permeability %u03BC at this high field strength
A small button placed on a horizontal rotating platform withdiameter 0.320m will revolve with the platform, How far from the axis can the button be placed, without slipping, ifthe platform rotates at 60.0 rev/min
A car takes 11 s to go from v = 0 to v = 75 m/s at approximately constant acceleration. If you wish to find the distance travelled using equation d = 1/2 at2, what value should you use for a.
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