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A rubber ball of mass 26.5 g is dropped from a height of 1.90 m onto a floor. The velocity of the ball is reversed by the collision with the floor,and the ball rebounds to a height of 1.35m. What impulse was applied to the ball during the collision?
A coil of area 0.100 m2 is rotating at 70.0 rev/s with the axis of rotation perpendicular to a 0.200 T magnetic field. If the coil has 700 turns, what is the maximum emf generated in it
Two positive point charges are a fixed distance apart. The sum of their charges is QT. What charge should each have in order to (a) maximize an electric force between them, and (b) minimize it.
While looking through the Mt. Palomar telescope, you discover a large planetary object orbited by a single moon. calculate the density of Planet Hephaestus
a physics student swings a pail of water in a vertical circle 1.0 m in radius at a constant speed. if the water is not
A sphere of radius 10.0 cm floats in equilibrium partially submerged in water with its lowest point 5.00 cm below the water's surface. What is the buoyant force acting on the sphere
Neutrons in thermal equilibrium with matter have an average kinetic energy of (3/2)kT, where k is the Boltzmann constant, What is the average kinetic energy of the neutrons
a wire is formed into a circle having a diameter of 10.3 cm and is placed in a uniform magnetic field of 3.25 mt. the
A 20.0 ?, 9.00 ?, and 9.00 ? resistor are connected in parallel to an emf source, What is the potential difference across the source
A particular guitar string is supposed to vibrate at 214 Hz, but it is measured to actually vibrate at 272 Hz. By what percentage must the tension in string be changed to get the frequency to the accurate value.
A skier moving at 20 m/s down a 30.0 degree slope encounters a region of wet snow, with a coefficient of friction u= .740. How far down the slop does he go before stopping
The magnitude of F is 306 newtons and it points at 93o measured counter clockwise from the positive x-axis. What is the y component (in newtons) of F.
What is walking speed if the speed drops. after an exciting but exhausting lecture, a physic lecture stretch out for a nap on a bed of nails, suffering no injury and only moderate discomfort. how is this possible.
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