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A child slides down a slide with a 21^\circ incline, and at the bottom her speed is preciselyhalf what it would have been if the slide had been frictionless.
Calculate the coefficient of kinetic friction between theslide and the child.
question1the magnitude of four displacement vectors shown in the drawing are a 16.0 m b 11.0 m c 12.0 m and d 26.0
An object has a total energy of 4.20 1015 J and a kinetic energy of 2.40 1015 J. What is the magnitude of the object's relativistic momentum
It has been suggested that rotating cylinders about 12 mi long and 5.1 mi in diameter be placed in space and used as colonies. What angular speed should such a cylinder have so that the centripetal acceleration at its surface equals free-fall acce..
tarzan who weighs 820 n swings from a cliff at the end of a 15.6 m vine that hangs from a high tree limb and initially
The inner and outer surfaces of a cell membrane carry a negative and positive charge, respectively. Because of these charges, a potential difference of about 0.077 V exists across the membrane. The thickness of the membrane is 8.1 x 10-9 m. What i..
Find the maximum temperature in a Carnot cycle operating in a room-temperature (25?C) environment if its Carnot efficiency is 0.2
a transverse wave travels on a string in the positive x-direction. the tension in the string is 200 n and the linear
The mass of a robot is 5200 kg. This robot weighs 3750 N more on planet A than it does on planet B. Both planets have the same radius of 1.33 107 m. What is the difference among MA - MB in the masses of these planets?
A bug (2 grams) crawls from the center to the edge of a disk that is freely turning at 20 rpm. What is the disk's new angular speed
A singly charged ion of unknown mass moves in a circle ofradius 13.0 cm in a magnetic field of7.7 T.What is the mass of the ion
Two 12-cm-diameter charged rings face each other, 17.0 apart. Both rings are charged to + 40.0. What is the electric field strength at the midpoint between two rings.
q1. a 80-g ball collides elastically with a 350-g ball that is at rest. if the 80-g ball was travelling in the positive
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