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A 60 kg football player is running down the field at a speed of 5 m/s. He is being chased by a 40 kg player who is running at a speed of 6 m/s. How fast is the second player moving in the center of mass reference frame of the two players?
Two trains, each having a speed of 38 km/h, are headed at each other on the identical straight track. A bird that can fly 70 km/h flies off the front of one train while they are 68 km apart and heads directly for the other train. On reaching other tr..
The planet saturn has a mass of 5.69x10^26kg and a volume of 8.01x10^23m^3. Would Saturn sink or float in water Explain
With each cycle, a 2430-W engine extracts 2080 J from a thermal reservoir at 90 °C and expels 1510 J into a thermal reservoir at 20 °C. How much time does each cycle take
An electric resistor is energized until the temperature of the H20 reaches 150 C. Determine the magnitude of the electric work done on the H2O and the entropy change of the H2O.
A lens forms an image of an object. The object is 16.0 cm from the lens. is it erect or inverted
question1a 71.0 person holds his arms so that his hands are 1.80 apart. typically a persons hand makes up about 1.00 of
A circular wire loop of radius is 16.0 cm carries a current of 2.80 A. What is the magnitude of the torque acting on the loop
The three ropes are tied to a small, very light ring. Two of these ropes are anchored to walls at right angles with tensions T1 = 35 N andT2 = 70 N. What are the magnitude and direction of the tension Tvec3 in third rope.
The total mass of the decay products is less than the mass of the original 294Uus atom and what accounts for this missing mass
Find the electric field at the center of a square of side d = 1.0 cm with charges of q = +9.0 µC at each corner
Compressed air is used to fire a 60 ball vertically upward from a 1.1--tall tube. The air exerts an upward force of 2.2 on the ball as long as it is in the tube. How high does the ball go above the top of the tube? Express your answer to two signific..
The Helium-Neon laser used in many labs and demos emits red light with wavelength of 0.6328 ?m. calculate how many photons of red light emerge from the laser every second
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