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A tortoise and rabbit engage in a footrace over a distance of4.40 km. The rabbit runs 0.480 km, then stops for a 80.0-min nap. Upon awakening, he remembers therace, and runs twice as fast. Finishing the course in a total timeof 1.80 h, the rabbit wins therace.What was his average speed before he stopped for a nap?
An electron and a proton are each placed at rest in a uniform electric field of magnitude 546 N/C. Compute the speed of each particle 52 ns after being free.
A room is 20 ft, 2in. long and 12 ft, 5 in, wide, and the ceiling is 12 ft, 2.5 inches above the floor; what is the volume of the room in cubic feet
In the days of horse-drawn wagons, iron tires used to be placed on wooden wagon wheels by heating the iron rims, what diameter will the tire have when it is heated to 680 oC
A ball of radius 37 cm is rolling down an inclined plane with no slipping. What is the balls angular acceleration at the bottom of the inclined plane
A Meteorite Strikes On October 9, 1992, a 27-pound meteorite struck a car in Peekskill, NY, leaving a dent 22 cm deep in the trunk. If the meteorite struck the car with a speed of 130 m/s , what was the magnitude of its deceleration, assuming it t..
A heat engine takes in 126 kJ of heat from a reservoir at 820 K and exhausts 88 kJ to a reservoir at 292 K. What is the efficiency of an ideal engine operating between the same two reservoirs
A turntable rotates with a constant angular acceleration 2.20rad/s^2. What was the angular velocity of the wheel at the beginning of the time interval 4.40s
A 4.00 kg mass is connected by a light cord to a 3.00 kg mass on a smooth surface. The pulley rotates about a frictionless axle and has a moment of inertia of .5 kg m2 and a radius of .30 m.
As an electron moves through a region of space , its speed decreases from 8*10^6 m/s to 3*10^6 m/s. Through what potential difference did the electron move
A 10.3 kg block is dragged over a rough, horizontal surface by a 63.6 N force acting at 21° above the horizontal. Find the total change in the block's kinetic energy
q1. sphere pendulum has mass of 1.5 kg attached to a cord length of 11.5 m sphere is released from rest while cord
The traces of the rain on the side windows of the car make an angle of 60.0 with the vertical. Find out the velocity of the rain with respect to the following reference frames.
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