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Given the vectors r1 = ai - bj+ ck and r2 = In(a)i + (1/b)j compute the vector product r1 x r2. Assume a, b, and c are positive constants. What is the angle between the vector product and r1? Using the same two vectors in the previous problem compute the scalar product r1*r2
a rifle with a weight of 30 n fires a 5.0g bullet with a speed of 300ms. if a 700 n man holds the rifle firmly against
The depth of a body of water can be found by emitting sound pulses at the surface and dectecting the pulses reflected from the bottom. what is the depth of the water
A plane's engine is pushing it north with a force of 1250N (weak engine). The wind is blowing to the east with a force of 125N. If the plane is a 775kg mass
Your sofa won't fit through the door of your new sixth-floor apartment, so you use a 1.08kW motor to lift the 84.4kg sofa 15.6m from the street. How much time does the lift take
What is the speed of a 204 g baseball with a de Broglie wavelength of 0.210 nm?
The process is claimed to produce 2000 J/min of work and to require an undisclosed amount of heat transfer with a heat reservoir at 300 K. Should inventor be issued a patent of this device.
The bottom of a test tube is 9.07 cm from the spin axis of a centrifuge. What is the total acceleration when the angular speed is 8.00 rad/s and the angular acceleration is 95.0 rad/s2?
children sled down a 44 m -long hill inclined at 25 degrees. at the bottom the slope levels out. if the coefficient of
Determine the normal modes and frequencies of the system shown in Figure when n=1.
an aluminum pie pan is connected by a wire to a metal plate. sitting parallel to plate 1 is a second metal plate
The drawing shows a top view of a square room. One wall is missing,and the wall on the right is a mirror. From point P in the center of the open side, a laseris pointed at the mirrored wall.
A simple harmonic oscillator consists of a block of mass 2.00 kg attached to a spring of spring constant 110 N/m. What is the amplitude of the oscillations
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