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A billiard ball strikes and rebounds from the cushion of a pool table perpendicularly. The mass of the ball is 0.38 kg. The ball approaches the cushion with a velocity of +2.10 m/s and rebounds with a velocity of -1.60 m/s. The ball remains in contact with the cushion for a time of 3.10 × 10-3 s. What is the average net force (magnitude and direction) exerted on the ball by the cushion?
A horizontal mass-spring system has low friction, spring stiffness 250 N/m, and mass 0.370 kg. The system is released with an initial compression of the spring of 10.8 cm, What is the maximum speed during the motion
A previous nuclear accident occurred where a worker received 100J/Kg of gamma radiation. Estimate the dose in rem of the worker
An object of mass 48.0 g is initially placed in boiling water so that it is at 105° C. Then the object is dropped into a calorimeter, Find the specific heat of the object
A violin string of length 35 cm and mass 1.1 g has a frequency of 478 Hz when it is vibrating in its fundamental mode. What is the wavelength of the standing wave on the string
the middle c string on a piano is under a tension of 892 n. the period and wavelength of a wave on this string are
Mass m1=10.0kg is located at the origin of a coordinate system. Mass m2=20.0kg is 1.20m to the right along the x axis. Find the coordinates of the center of mass of this system
Two long, parallel wires carry currents of 0.245 A in the same direction. If the wires are 0.034 m apart, what is the force per unit length between the wires
A wheel rotates with a constant angular acceleration of 4.35 rad/s2. Suppose that the initial angular speed of the wheel is 2.99 rad/s. Elucidate through what angle does the wheel rotate after 2.88 s?
While rearranging a dorm room, a student does 435 J of work in moving a desk 2.5 m. What was the magnitude of the applied horizontal force
An elephant that has a mass of 7000 kg evenly distributes her weight on all four feet. estimate the pressure on each foot
q1. if a car travelling at 63 kmh will skid 18 m when its brakes lock how far will it skid if it is travelling at 150
a system has 1011 binding sites for a protein. of these sites 105 are originally filled. the system moves to a new
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