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A 15 kg block is at rest on a level floor. A 415 g glob of putty is thrown at the block such that it travels horizontally, hits the block, and sticks to it. The block and putty slide 15 cm along the floor. If the coefficient of sliding friction is 0.40, what is the initial speed of the putty?
A plastic rod is rubbed against a wool shirt, How many electrons are transferred from the wool shirt to the plastic rod? The elemental charge is 1.6 × 10?19 C
The soccer goal is 21.78 m in front of a soccer player. She kicks the ball giving it a speed of 18.69 m/s at an angle of 25.43 degrees from the horizontal. find the speed of the ball just as it reaches the goalie
When the tips of the rotating propeller of an airplane have a linear speed greater than the speed of sound, the propeller makes a lot of noise, which is undesirable. If the length of the propeller is 2.354 m
A stone is thrown horizontally at 70.0 m/s from the top of a very tall cliff. Calculate its horizontal position and vertical position at 2.00 s intervals for the first 10.0s
One can not align the apparatus to eliminate entirely the effects of the Earth's magnetic field. calculate the component of the earth magnetic field perpendicular to the entering electron beam
A cylindrical aluminum rod, with an initial length of 0.8200 m and radius 1200.0 µm, is clamped in place at one end and then stretched by a machine pulling parallel to its length at its other end. Assuming that the rod's density (mass per unit volume..
A car moving at 10.0 m/s encounters a bump that has a circular cross-section with a radius of 30.0 m. What is the normal force exerted by the seat of the car on a 60.0-kg passenger
A system performs 357 J of work on its surroundings while losing 133 J of internal energy. Determine the heat transferred to the system during this process
Approximately how many atoms make up our planet? For simplicity, suppose the average atomic mass of the atoms is 14 . Avogadro's number gives the number of atoms in a mole.
Some object moves 100.0 m at an angle of 36° west of south. During this motion, a 92.0 N force acts on the same object, what is this force's orientation
At a distance of 1.41 m from a point charge of +2.74 ?C, how many of the additional equipotential surfaces are crossed by the time the electric field has shrunk to one-half of its initial value
a proton is released from rest in a uniform electric field of magnitude 421 nc. a find the electric force on the
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