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Question1
A hunter wishes to cross a river that is 1.4 km wide and that flows with a speed of 7 km/h. The hunter uses a small powerboat that moves at a maximum speed of 14 km/h with respect to the water.
What is the time essential for crossing if the hunter wishes to move neither up stream nor downstream while crossing the river? Illustrate the vectors to scale on a graph to determine the answer.
Respond in units of min
Question2
A light plane is headed due south with a speed of 156 km/hr relative to still air. After 1.09 hour, the pilot notices that they have covered only 122 km and their direction is not south but southeast (45.0 degrees). What is wind velocity (magnitude)? What is wind velocity (direction)?
At the bottom of the slope, the path levels out and become horizontal, the snow becomes less icy, and the skier begins to slow down, coming to rest in a distance of 160.00 m along the horizontal path.
Kim has a metal casting company which makes commemorative coins. She has 0.12 cubic meters of silver which she needs to make into 1.07E5 coins of thickness 2 mm. If she uses all of the silver, what is the diameter in centimeters of each coin.
Find out the angular momentum and angular speed of the disk. what is the magnitude of the force (in mN) between the two charges.
A solid uniform 38.9kg ball of diameter 36.2cm is supported against a vertical frictionless wall using a thin 30.0cm wire of negligible mass. how hard does the ball push against the wall
A small, 10.0 g insect stand at one end of a thin uniform metal rod which is initially at rest on a frictionless horizontal table. What is the resulting angular speed of the rod
The heating coil of a hot-water heater has a resistance of 20.0 and operates at 210 V. If electrical energy costs $0.080/kWh, what does it cost to raise 290 kg of water in the tank from 15 °C to 74° C.
a ball is tossed directly upward at an initial speed of 5.7m/s and is caught when it falls back down to the throwers hand, how much total time is the ball airborne
One afternoon, a couple walks three-fourths of the way around a circular lake, the radius of which is 1.69 km. What is the distance they travel
A rocket blasts off vertically from rest on the launch pad with an upward acceleration of 2.30. At 10.0 after blastoff, the engines suddenly fail, which means that force they produce instantly stops.
After the collision (assumed elastic), the second ball is moving along the positive y axis. Elucidate the final direction of the first ball, and what are their two speeds?
When the tire surface is rotating at the maximum speed of 12 m/s stone flies out of the tread. The magnitude FN of the normal force that each side of the tread channel exerts on the stone is 1.8 N. suppose that only static friction supplies centripet..
A whale swims due east for a distance of 1.5 km, turns around and goes due west for 5.7 km, and finally turns around again and heads 4.5 km due east. What is the total distance traveled by the whale
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