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Indiana Jones is pushing back a 305 kg box of treasure which slides 4.6 m down a 25° incline and kept from accelerating. The effective coefficient of kinetic friction is 0.34 What's the Force of Friction?
the two stars in a binary star system have masses 1.7 x 10 ^ 30 kg and 5.8 x 10 ^ 30kg. They are separated by 2.1 x 10 ^ 12m, What is the speed of the heaviest star
A 175 watt motor is used to lift a 129 kg container to a height of 7m. How much time does it take to lift container with the motor.
A square room has 3 mirrored walls of length L with one side missing. A laser is fired from the center of the open side of the room with an angle of incidence, I, what must the angle of incidence be
A 932 kg rocket is motionless in space. To start moving, its main engine is fired for 7 s, during which time it ejects exhaust gases at 1205 m/s. What is the approximate mass of ejected gas
A 80.0 kg football player leaps straight up into the air (with no horizontal velocity) to catch a pass. how fast was the ball travelling
Two capacitors have the same plate separation, but one has square plates and the other has circular plates, at is the dielectric constant kcircular of the material between the circular plate
A 1.00 kg object is attached to a horizontal spring. The spring is initially stretched by 0.200 m, What is the maximum speed of the object
When a 1.1 kg mass is hung from a spring it is found to stretch by 11 cm. The spring is stretched an additional 5 cm and released. What is the maximum potential energy
Find the final velocity of the two balls if the ball with velocity v2i = ?21.4 cm/s has a mass equal to half that of the ball with initial velocity v1i = +25.8 cm/s
A free electron and a free proton are placed in an identical electric field. which of the following statement are true?
A 65Kg ice skater pushes off his partner and accelerates backwards at 1.3m/s^2. If the partner accelerates in the opposite direction at 2.0m/s^2, what is mass of the other skater.
A high electron mobility transistor (HEMT) controls large currents by applying a small voltage to a thin sheet of electrons. What is the density of electrons per m3 in the sheet? Do not enter unit
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