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A box is pushed a distance d along a ramp at a constant speed by a horizontal force, Fa. The mass of the box is m. The ramp is inclined at an angle of theta above the horizontal and the coeffcient of kinetic friction between the box and the ramp is (mu)k: how much work is done by the horizontal force as the box moves a distance d up the ramp?
Sodium ions (Na+) move at 0.860 m/s through a bloodstream in the arm of a person standing near a large magnet. what would be the magnetic force on the arm
A thin film of MgF2 (n=1.38) coats a piece of glass. Constructive interference is observed for the reflection of light with wavelengths of 500nm and 625nm.
The focal length of a bi-convex lens is 10 cm. The focal length of a convex-concave thin lens is -20 cm. If placing them in parallel and in close contact, what is the compound focal length
A steel wire on a guitar has a length of 0.500 m and a mass of 3.50 x 10^-3 kg. To what tension must the wire be tightened
A kayaker needs to paddle north across a 100m wide harbor. The tide is going out, creating a tidal current that flows east at 2 m/s. The kayaker can paddle with a speed of 3 m/s.
As the swimmer approached the Ontario shore, she encountered a cross current of 2 m/s [E 25 S]. Compute her velocity with respect to the crowd observing from the beach (with respect to the ground)
Andrea thinks she's sitting at rest in her 5.0-m-long dorm room as she does her physics homework. what range is her velocity
An electron is observed traveling at a speed of 25.7·106 m/s, How far will the electron travel before coming to a stop
a 4-omega and 6-omega resistor are connected in series to a battery with V=12V. Calculate the power dissipated in the 6-omega resistor
A boy holds a 40-N weight at arm's length for 10 s. His arm is 1.5m ablove the ground. The work done by the force of the boy on the weight is
A 1000 ? resistor is joined in series with a 600m H inductance and a 24 Volts battery. What is the time constant of the circuit
A 0.347-nm photon collides with a stationary electron. After the collision, the electron moves forward and the photon recoils backwards. Find the momentum of the electron
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