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A box is pushed with horizontal force of 120 N so that it slides a distance of 7.0 m across the floor at constant speed. How much thermal energy is created by the sliding box?
A motorist drives north for 32.0minutes at 76.5 km/h and then stopsfor 15.0 minutes. He then continues north, traveling 130 km in1.60 h. What is his total displacement
Suppose you look through a 3.3 mm thick window comprised of a material whose refractive index is 1.63. Find by what time interval is the light you see delayed by having to go through glass instead of air
just as you touch a metal door knob a spark of electricity electrons jumps from your hand to the knob. the electric
Suppose the distribution of serum cholesterol values in undergraduate men is approximately normally distributed with mean μ = 190 mg/dl and standard deviation σ = 40 mg/dl.a) What is the probability of selecting someone at random from this population..
if a hot reservoir of an engine is 300k and cold reservoir 200k, what is the carnot efficiency of this engine
An object with a mass of m = 4.8 kg is attached to the free end of a light string wrapped around a reel of radius R = 0.235 m and mass of M = 3.00 kg. The reel is a solid disk, free to rotate in a vertical plane about the horizontal axis passing t..
A sign is supported by a cable and horizontal beam; the beam has length 2.00 m and uniform mass 32.0 kg. If the cable is attached to the beam at a distance
A 350 Ohm resistor is connected in series with a 30 milli-farad capacitor. If this arrangement is wired across a 12-volt battery, What is the initial voltage across the capacitor
A pendulum is timed as it swings back and forth. The clock is started when the bob is at the left end of its swing. When the bob returns to the left end for the 90th return, the clock reads 60.0s. What is the period of vibration?
A pendulum of length 1.5 m swings back and forth in a friction free laboratory environment. The pendulum is 1.4 m above the floor at the high point of its swing and 1.3 m above the floor at the low point.
An object has a volume of 0.25 m^3 and weighs 3000 N. What will be its apparent weight when submerged in water
An explorer is caught in a whiteout (in which the snowfall is so thick that the ground cannot be distinguished from the sky) while returning to base camp. How far (in km) must he now travel to reach base camp
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