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On an essentially frictionless, horizontal ice rink, a skater moving at 4.1 m/s encounters a rough patch that reduces her speed by 49% due to a friction force that is 26% of her weight. Use the work-energy theorem to find the length of this rough patch in m.
A Van de Graa? generator has a potential di?erence of 2.35 MV between the belt and the outer shell. What minimum power is needed to drive the moving belt
A picture shows a charge A 1.00 m above the origin and has a charge of 5.00 X10^-9, Find the magnitude and direction of the electrostatic force on charge B.
Laser beam with wavelength 632.8 nm is aimed perpendicularly at opaque screen with two identical slits on it, positioned horizontally, What are the double slit characteristics
A square loop of Cu wire 4.00cm on an edge is lying on a horizontal table. An electromagnet above the square loop is turned on to produce a magnetic field. what is the power loos in the loop
A Bullet of mass 14g strikes a block of mass 1.2kg, which is at rest on a horizontal frictionless surface and is attached to a coil spring shown. Find the velocity of the block just after impact
Two Satellites A and B, each of mass 50 kg are in circular orbits at altitudes of 1000 km and 35000 km respectively. What is the difference in gravitational potential energies of the two satellites in their respective orbits
An undersea research chamber for aquanauts is spherical with an external diameter of 4.7 m. calculate the buoyant force on the chamber
A 480 W heating coil designed to operate from 100 V is made of Iron wire 0.548 mm in diameter, calculate the length of wire used
two small beads having positive charges 3q and q are fixed at the opposite ends of a horizontal, insulating rod, extending from the origin to the point x=d. a third small chatged bead is free to slide on the rod. at what position is the third bead..
You fire a gun horizontally that is 25m off the ground and the bullet goes at 200m/s. What is the time it takes for the bullet to hit ground, how far down range does bullet travel, and what is the resultant velocity (in m/s) and final angle.
One 20-year-old twin brother takes a space trip with a speed of 0.80c for 30 years according to a clock on the spaceship, determine the age of the Earth-based twin brother
The Gravitron is an amusement park ride in which riders stand against the inner wall of a large spinning steel cylinder. At some point, What is the maximum rotational speed at which the riders will not slide up the walls of the ride
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