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three forces when added produce a resultant force that is 100N pointing 63° above the positive x-axis. if one of the forces is 50N in the positive y direction and another is 100N in a direction 45° below the positive x-axis, what are the magnitude and direction of the third force?
A ceiling fan is turned on and a net torque of 1.6 N·m applied to the blades. What is the angular acceleration of the blades
A shopper pushes a cart 44- m south down one aisle and then turns 90.0° west and moves 30 m. He then makes another 90° turn and moves 13 m.
A force of 315 N is applied horizontally to a wooden crate in order to displac eit 35.0 m accorss a level surface at a constant velocity. As a result of this work the crate's internal energy is increased by an amount equal to 14 percent of the cra..
At what temperature is the speed of sound in helium (ideal gas, = 1.67, atomic mass = 4.003 u) the same as its speed in oxygen gas at 11.0 oC? The speed of sound in oxygen at 11.0°C is 322 m/s.
A uniform magnetic field of magnitude 0.80 T is directed perpendicular to the plane of a rectangular loop, calculate the magnetic flux through the loop
A vertical spring with a spring constant of 440 N/m is mounted on the floor. what height (in cm) above the compressed spring was the block dropped
When the Sun is straight overhead, a hawk dives toward the ground with the constant velocity of 4.50 m/s at 52° below the horizontal. Compute the speed of her shadow on the level ground.
Four equal charges of +4.9×10-6 C are placed on the corners of one face of a cube of edge length 7.0 cm. calculate the magnitude of the force on the charge
q1. suppose that in franck-hertz experiment electron of energy 12.5 ev is used to excite hydrogen atoms. what is the
A 250-g object attched to a spring oscillates on a frictionless table with a frequency of 4 Hz and an amplitude of 20 cm. Calculate the maximum potential energy of the system
A small ball of mass 0.60 kg is attached to one end of a 1.15 m long massless rod, and the other end of the rod is hung from a pivot
An astronaut is being tested in a centrifuge. The centrifuge has a radius of 12.0 m and, in starting, rotates according to ? = 0.31t2, what is the astronaut's radial acceleration
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