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In a shuffleboard game, the puck slides a total of 12 m before coming to rest. If the coefficient of kinetic friction between the puck and board is 0.28, what was the initial speed of the puck?
You are driving to the grocery store at 20 . You are 110 from an intersection when the traffic light turns red. Assume that your reaction time is 0.50 and that your car brakes with constant acceleration.
A 1200-kg car travels at a constant speed of 18.00 m/s around a circular track that is 80m across. What is the kinetic energy of the car?
Two wires, each 28.15 cm long, are connected to two separate 9.00 V batteries as shown in the figure. The resistance of the first wire is 5.00 Ω, and that of other wire is unknown (R). If the separation between the wires is 4.55 mm, what value of R w..
A device operates in a three process cycle. In process one, the device receives 35kJ of heat and does no work. Determine the COP or efficiency as applicable
A beam of particles is directed at a 0.0178 kg tumor. There are 1.56×1010 particles per second reaching the tumor, Calculate the biologically equivalent dose (in rem) given to the tumor in 26.8 s.
A flat puck with mass M=.10kg is rotated in a circle with radius R=.20 m on a frictionless air-hockey tabletop at constant speed. then what is the weight G=mg of the dangling block
A flea pulls on a puck with force 7 microN at an angle of 30?. Another flea pulls on the puck with force 2 microN at an angle of -60?.
At a distance of 4.32m from a siren, the sound intensity is 3.75 x 10-2 W/m2. Assume that the siren radiates sound uniformly in all directions; find out the total power radiated.
The reflected sound is afterwards mixed with the transmitted sound, and 85 beats per second are detected. The speed of sound in body tissue is 1520m/s. compute the speed of the fetal heart wall at the instant this measurement is made.
The cable lifting an elevator is wrapped around a 1.0--diameter cylinder that is turned by the elevator's motor. The elevator is moving upward at a speed of 2.3 . It then slows to a stop, while the cylinder turns one complete revolution.
A cell has a 7.0-nm-thick membrane with a total membrane area of 6.0\times10^{-9}\;{\rm m^2}, How many sodium ions does this charge correspond to
A force of 323N is applied horizontally to a crate in order to displace crate 30m across a level floor at a constant velocity. As a result of this work.
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