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Two 72.0- hockey players skating at 7.00 collide and stick together. If the angle between their initial directions was 135 , what is their speed after the collision?
two converging lenses, each of focal length 15.0 cm, are placed 40cm apart, and object is placed 30cm in front of the first. what is the magnification of the system
A highway is to be built between two towns, one of which lies 50.0 km south and 80.0 km west of the other. at what angle would this highway be directed
A convex spherical mirror with a radius of curvature of 11.0 cm produces a virtual image one third the size of the real object. Where is the object
A large bouncy ball with a mass of 209 g is dropped straight down and then bounces back up to a height that is slightly lower than the point from which it was dropped. compute the magnitude of the average force that the floor exerts on the ball
25% of a radioactive material stays active after 4 hours. What is the half-life of this radioactive material
After being accelerated through a potential difference of 5.42 kV, a singly charged carbon ion (12C) moves in a circle of radius 20.8 cm in the magnetic field of a mass spectrometer. What is the magnitude of the field
An airplane's takeoff speed is 320 km/h. If its average acceleration is 2.90 m/s^2, how long is it on runway after starting its takeoff roll.
Drops of rain fall perpendicular to the roof of a parked car during a rainstorm. find the average force exerted by the rain on the roof
A converging lens (f = 14.6 cm) is located 31.4 cm to the left of a diverging lens (f = -7.91 cm), Find the overall magnification
A tight uniform string with a length of 1.80 m is tied down at both ends and placed under a tension of 100 N. What is the mass of the string
An inventor claims to have devised a cyclic engine which exchanges heat with reservoirs at 300 K and 540 K, and which can produce 450 J of work per 1000 J of heat extracted from the hot reservoir. Is his claim feasible.
A rocket moves upward, starting from rest with an acceleration of 29.9 m/s2 for 3.31 s. It runs out of fuel at the end of the 3.31 s but does not stop. Evaluate how high does it rise above the ground?
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