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One billiard ball is shot east at 2.19 m/s. A second, identical billiard ball is shot west at 1.04 m/s. The balls have a glancing collision, not a head-on collision, deflecting the second ball by 90° and sending it north at 1.42 m/s. What is the speed of the first ball after the collision?
What is the direction of the first ball after the collision? Give the direction as an angle (in degrees) south of east.
The right-side rearview mirror of Mike's car says that objects in the mirror are closer than they appear. What is the focal length of the rearview mirror
a steel rod is used to transfer heat from a chamber at 300 k to a chamber at 250 k. which of the following changes in
A boy is trying to retrieve his toast from a toaster using a metal knife. He touches one of the wires inside, which is connected to 120 V. What is the current through his body
When people sleep, their metabolic rate is about 2.6 x10-4 C/(s.kg). How numerous Calories does a 69 kg person metabolize while sleeping 9 hours.
If the top coil were rotated 90 degrees about a vertical axis through the center of the coil so it is perpendicular to the balance coil, how would the results of the experiment change
a 30 kg child on a sled slides down a frictionless slope angled at 15 degrees with respect to the horizontal. what is the magnitude of the wind force, F, such that the acceleration of the child is 1 m/s^2
A model rocket fired vertically from the ground ascends with aconstant vertical acceleration of 54.8 m/s2for 1.05 s. What is themaximum altitude reached
A stunt man whose mass is 70 kg swings from the end of a 4.40-m long rope along the arc of a vertical circle. Assuming that he starts from rest as rope is horizontal, find out the tensions in the rope that are required to make him follow his circu..
A satellite is in a circular orbit about the earth (ME = 5.98 1024 kg). The period of the satellite is 4.40 104 s. What is the speed at which the satellite travels
A small metal sphere of mass 6.9 g and charge 5.9 μC is firedwith an initial speed of 4.9 m/s directly toward the center of asecond metal sphere carrying charge 7.2 μC. This second sphereis held fixed.
A long wire is known to have a radius greater than 4.0 mm and to carry a current that is uniformly distributed over its cross section. What is the radius of the wire
A solid spherical conductor of radius 15 cm has a charge Q = 6.5 nC on it. How much charge is there on the second sphere after the two spheres have been separated
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