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Two rocks collide in outer space. Before the collision, one rock had mass 15 kg and velocity ‹ 4300, ?2700, 2350 › m/s. The other rock had mass 8 kg and velocity ‹ ?600, 2100, 3750 › m/s. A 2 kg chunk of the first rock breaks off and sticks to the second rock. After the collision the 13 kg rock has velocity ‹ 1400, 250, 1900 › m/s. After the collision, what is the velocity of the other rock, whose mass is now 10 kg?
A 5g lead bullet travelling at 370-m/s is stopped by a large tree. If half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet whilst the other half is transmitted to the tree, what is the increase in t..
A soccer player kicks a ball, giving it an initial velocity of 17.2 m/s in the horizontal direction, How far down the field does the ball travel before landing
A blender is switched to a lower speed and the angular velocity of its blade decreases uniformly from 52 rad/s to 12 rad/s. Through what angle does the blade turn during this time
A river has a steady speed of 0.25m/s. A student swims upstream a distance of 1 km and swims back to the starting point. If the student can swim at the speed of 1.4m/s in still water.
Net horizontal force due to rolling friction
Calculate the wavelength of light in vacuum that has a frequency of 6.1 105 Hz. Calculate the energy of one photon of such light in vacuum
A nail projects 25.0 mm horizontally outward from a wall. A 400 N picture is hung from the end of the nail, what is the diameter of the nail
What must the charge (sign and magnitude) of a 1.49-g particle be for it to remain stationary when placed in a downward-directed electric field of magnitude 660N/C?
find electric field produced by the particles equal to zero. Find out the x and y components of this force.
Dan is gliding on his skateboard at 2.0 m/s. He suddenly jumps backward off the skateboard, kicking the skateboard forward at 8.0 m/s. How fast is Dan going as his feet hit the ground? Dan's mass is 60 kg and the skateboard's mass is 5.0 kg.
The department actually completed 10,000 hours of production. Illustrate what is the appropriate total budget for the department, assuming it uses flexible budgeting?
Unpolarized light with an intensity of 830 W / m2 is incident on a polarizer with an unknown axis. What is the angle between the axes of the polarizers
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