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A cosmic ray plows into Earth's upper atmosphere, liberating a shower of subatomic particles. One of these particles moves downward 3.2 km, then undergoes a collision after which it moves 1.6 km at 27 deg. northward of the vertical. It then undergoes another collision that sends it moving horizontally eastward for 2.1 km before it annihilates with another particle. What is the magnitude of its displacement ?
A package of supplies is to be dropped from an airplane so that it hits the ground at a designated spot near some campers, What should the angle be between the horizontal and the pilot's line of sight to the drop point
each second 5e23 nitrogen molecules (m=4.65e23 g) collide with a 10cm2 wall assume that the molecules all travel with a common speed of 290m/s, What is the pressure on the wall
The speed of sound in air at room temperature is 340 m/s. What is the frequency of a sound wave in air with wavelength 1.3 m
child is playing by jumping on a bathroom scale. the mass of the child is 31 kg and when he stands on a bathroom scale
Two similar guitar strings have the same length and mass, but slightly different tensions, If the beat frequency is 1.5 Hz, what is the ratio of the tensions of the two strings
in unit-vector notation what is the torque about the torque about the origin on a particle located at coordinate 0
A 0.12-kg ball is placed in a shallow wedge with an opening angle of 120°, as shown in the figure. For each contact point between the wedge and the ball, determine the force exerted on the ball. Assume the system is frictionless. Find contact force o..
A boy stands at a point 260 meter in front of the face of a sheer cliff. If the boy shouts, find how much time will elapse before an echo is heard
A laser emits a cylindrical beam of light 2.6 mm in diameter. what is the rms value of the electric field in the laser beam
What is an expression for , the position of mass I as a function of time? imagine that position is measured in meters and time is measured in seconds.
it has been suggested that rotating cylinders about 12 mi long and 4.6 mi in diameter be placed in space and used as
If Aristotle and Galileo were able to discuss the motion of two falling weights, light steel ball an d a heavy lead ball, What about its motion would they have agreed and disagreed about
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