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a) An engine absorbs 140 Joule and rejects 75 Joule in each cycle. Determine what is its efficiency?
b) If each cycle takes 0.6 second, obtain the power output of this engine.
q. a hot wheels track has a spring loaded launcher. a 100g car is pushed into the launcher which compresses the spring
q1. a small metal sphere carrying a net charge of -2.70 is held in a stationary position by insulating supports. a
consider a solid of molecules where there are two states of lowest energy and one excited state at energy e. at 600k
The electron and proton of a hydrogen atom are separated (on the average) by a distance of approximately 5.3 x10-11 m. Find the magnitude of the electric force.
An electric turntable 0.800 in diameter is rotating about a fixed axis with an initial angular velocity of 0.270. hat is the tangential speed of a point on the tip of the blade at time = 0.208
A soap film with different thicknesses at different places has an unknown refractive index n and air on both sides. Find the ratio tmagenta/tyellow
An electric field is E=(200 N/C) i in the region x>0 and E=( - 200 N/C) i in the region x
398 g of water at 64°C is added to ice at 0°C. If the final temperature of the system (which you can assume is isolated) is 0°C, determine how much ice melted
You roll a ball along the floor for your dog to chase after and catch it. You roll the ball with an initial speed of 15 m/s, how far does the ball go before your dog catches it
A 0.0220 kg bullet moving horizontally at 450 m/s embeds itself into an initially stationary 0.500 kg block. How far does this combination travel before stopping
A baseball is hit at an angle of 27.5 degrees and just clears the right field fence 87 meters away. What was the overall initial velocity of the baseball
A 64 kg skier starts from rest at height H = 16m above the end of a ski-jump ramp (Fig. 8-39). As the skier leaves the ramp, his velocity makes an angle of θ = 32° with the horizontal. Neglect the effects of air resistance and suppose the ramp is fri..
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