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A 72.0 kg base runner begins his slideinto second base when he is moving at a speed of 4 m/s. The coefficient of friction between hisclothes and Earth is 0.70. He slides so that his speed is zero justas he reaches the base.
a) How much mechanical energy is lost due to friction acting on the runner?b) How far does he slide?
An indoor swimming pool of depth 2m transfers heat at a rate of 100w/m2 to the 10m of air between the pool and the roof for 1000s. What is the temperature change of the air
A gardener feels it is taking him excessively long to water a garden with a 0.952cm diameter hose. By what factor will his time be shortened, if he uses a 1.58 cm diameter hose.
High-speed stroboscopic photographs show that the head of a 190-g golf club is traveling at 58 m/s just before it strikes a 46-g golf ball at rest on a tee, Find the speed of the golf ball just after impact
A wire carrying a 2A current is placed at an angle of 60 degrees with the respect to a magnetic field of strength 0.2T. obtain the magnitude of the magnetic force acting on the wire
What is the net upward force on an airplane wing of area 20.7 m2 if the speed of air flow is 232 m/s across the top of the wing and 215 m/s across the bottom? (The density of air where the airplane flies is ρair = 1.21 kg/m3.)
Point charges, Q1 = +46 nC and Q2 = -75 nC, are placed as shown. The work done by the external force is closest to
The height of a helicopter above the ground is given by h = 3.00 t3, where h is in meters and t is in seconds. After 2s, the helicopter releases a small mailbag. How long after its release does the mailbag reach the ground.
Water moves from a tank into a tapered outlet 6.0m below the watersurface. Determine the velocity of the water after it leaves the 2.0cmoutlet. Determine the volume and mass rate of flow of the water.
At the center of a 62-m-diameter circular ice rink, a 86 kg skater traveling north at 2.75 m/s collides with and holds onto a 50 kg skater who had been heading west at 3.58 m/s
A charge of density p is distributed uniformly along an arc representing a half of a cirle of radius r. Determine the electric field intensity vector at an arbitrary point
compute the electric flux through a rectangular plane.
A camera is supplied with two interchangeable lenses, whose focal lengths are 42.0 and 180.0 mm. What is the height (including sign) of her image on the image sensor
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