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To get off a frozen, frictionless lake, a 71.0 kg person takes off a 0.170 kg shoe and throws it horizontally, directly away from the shore with a speed of 2.00 m/s. If the person is 5.20 m from the shore, how long does it take for him to reach it?
A man standing1.54m in front of a shaving mirror produces an inverted image20.0cm in front of it. How close to the mirror should he stand
A fireman, 25.6 m away from a burning building, directs a stream of water from a ground level fire hose at an angle of 39.5° above the horizontal
A cylinder with moment of inertia 18.8 kg m2 rotates with angular velocity 7.85 rad/s on a frictionless vertical axle. Show that energy is lost in this situation by calculating the ratio of the final to the initial kinetic energy
A public transportation bus makes the position-time graph over a 5.00 hour interval shown below. What is the average velocity (magnitude and direction) of the bus
Assume that a cloudy parcel has T = 275 K, wl = 1.5 g/kg. The background atmosphere has T = 274 K, and a relative humidity of 0.6. Assume a total pressure p = 600 hPa. What is the buoyancy of the cloudy parcel
You have been given 1.752 g of copper from which you are to fashion a wire whose resistance is 2.519 ohms. What will be the density of the wire you fashion
what will be observed on the screen? a fuzzy image is visible no image is visible on the screen a clear image slightly smaller than the original image is visible a clear image slightly larger than the original image is visible.
A 100 kg sled is slid across a smooth ice field by a group of four dogs tied to the sled pulling with a 350 N force along a rope at an angle of 20 degrees above the horizontal. (a) If the sled travels at a constant speed, find the drag force on the s..
A 71-kg skier is going down a slope oriented 32° above the horizontal. Determine the pressure that each skier exerts on the snow
A circular steel wire 2.00m long must stretch no more than0.25 cm when a tensile force of 400N is applied to each end of the wire. What minimum diameter is required for the wire
A 3000 kg lunar lander is in orbit 50 km above the surface of the moon. how much work must the thrusters do
A 10-g ball moving at 4 cm/s to east collides with a 5-g ball moving to the west at 6 cm/s. If the collision is elastic, find the magnitude and direction of the final velocity of each ball after collision.
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