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A certain automobile engine delivers 2.54 ? 104 W (34.0 hp) to its wheels when moving at a constant speed of 25.0 m/s ( 56 mi/h). What is the resistive force acting on the automobile at that speed?
On the Moon's surface, lunar astronauts placed a corner reflector, off which a laser beam is periodically reflected, What is the difference in travel time for light that travels only through space to the moon and back and light that travels through ..
A displacement vector at an angle of 150 degrees (counter clockwise) from the x axis has a y component equal to 123 meters
A 24.5 kg child is standing on the outer edge of a merry-go-round which has moment of inertia 989 kg*m2 and radius 2.40m. Find the angular velocity if the child moves to a final position
An inductor has a 53.6 ohm reactance when connected to a 60.0-Hz source, What is the maximum current in the inductor
you and maria each own identical spaceships. As you fly past maria, you measure her ship to be 89 m long and your own ship to be 100 m long. How fast is Maria moving relative to you
Coherent light with wavelength 591nm passes through two very narrow slits, and the interference pattern is observed on a screen a distance of 3m from the slits. The first-order bright fringe is a distance of 4.84mm from the center of the central b..
The density of the sea water is 1025 kg/m3. The density of ice is 917 kg/m3. Explain how high does the top of the ice block float above the water level?
A heat of 4.3*10^6KJ is req to convert a block of ice at -15deg C into water at 15deg C. What is mass of ice
A projectile is launched straight up at 141 m/s. How fast is it moving at the top of its trajectory? Suppose it is launched upward at 45 degrees above the horizontal plane. How fast is it moving at the top of its curved trajectory and what is the ..
three uniform thin rods, each of length L = 39 cm, form an inverted U. The vertical rods each have a mass of 15 g; the horizontal rod has a mass of 32 g. Elucidate what are (a) the x coordinate and (b) the y coordinate of the system's center of ma..
A motorist travelling at 17m/s encounters a deer in the road 49m ahead. If the maximum acceleration the vehicle's brakes are capable of is -7 m/s2. If his or her reaction time is 1.9987 s, how fast will (s) he be travelling when (s) he reaches dee..
A 1443 kg railroad car traveling at a speed of 10m/s strikes an identical car at rest. what is their common speed afterward
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