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A 30 kg girl who's running at 3 m/s jumps on a stationary 10 kg sled on a frozen lake. How fast does the sledwith the girl on it move?
A 1600 kg car traveling eastward at 32 m/s collides at an intersection with a 700 kg motorcycle traveling northward at 45 m/s. What is the direction of the car's velocity after the collision
An air puck of mass m1 = 0.30 kg is tied to a string and allowed to revolve in a circle of radius R = 1.0 m on a frictionless horizontal table. The other end of the string passes by a hole in the center of the table, and a mass m2 = 1.20 kg is att..
For the real or imaginary nucleus of 70X170, find the net electrical charge of the nucleus and the approximate radius of the nucleus
Three forces in the x-y plane act on a 5.5 kg mass: 10.3 N directed at 37°, 12.2 N directed at 128 °, and 4.1 N directed at 201° . Calculate the direction of the resultant force
An infinitely long cylinder, radius a, carries a current I, distributed uniformly over its cross-sectional area. The axis of the cylinder coincides with the z-axis.
An early method of measuring the speed of light makes use of a rotating slotted wheel. What is the constant angular speed of the wheel
a rocket with inital mass 1000 kg adjusts its thrust byvarying the rate at which mass is ejected. the ejection speedrelative to the rocket is 30 km/s. find at what rateis mass being ejected at that instant
An outfielder throws a 0.150-kg baseball at a speed of 22.0 m/s and an initial angle of 30.0°. What is the kinetic energy of the ball at the highest point of its motion
As the driver steps on the gas pedal, a car of mass 1 180 kg accelerates from rest. What is the minimum average power output of the engine over this time interval
A point charge q1=+2.40 micro C is held stationary at the origin. How much work is done by the electric force on q2
A motor attached to a 120 V/60 Hz power line draws an 8.10 A current. Its average energy dissipation is 810 W. What is the motor's resistance
A single slit has a width of 2.10x10^-6 m and is used to form a diffraction pattern. Find the angle that locates the second dark fringe
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