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An automobile engine has an efficiency of 53.7% and produces 3540 J of work. How much heat is rejected by the engine?
A sprinter can accelerate with constant acceleration for 4.50 second before reaching top speed. Calculate his speed as he crosses the finish line
A corn hole player throws a bean bag by swinging it near the ground at 10 m/s. The objective is to land the bag in the opposing hole located 7.3m away. What are these two angles
A man pushes a wooden crate on wooden floor. The direction of the force is 30o from the horizontal. How much force does he use in order to maintain a constant speed
An electric eel develops a 460V potential difference between its head and tail. What is the energy delivered by this pulse
In a television picture tube, electrons strike the screen after being accelerated from rest through a potential difference of 18000V. The speeds of the electrons are quite large, and for accuratecalculations of the speeds, the effects of special r..
Point charges of 24.0 µC and 49.0 µC are located 0.500 meter apart. Find the magnitude and direction of the electric field halfway between them
A parallel-plate capacitor has plates separated by 0.72 mm. what is the potential difference between the plates
Water flows at 0.950 m/s from a hot water heater, through a 450-kPa pressure regulator. What's the flow speed in this pipe
If an electron in a hydrogen atom makes a transition from the n = 7 to the n = 1 state, what is the wavelength of the photon emitted
A crate is pulled by a force (parallel to the incline) up a rough incline. The crate has an initial speed of 1.5m/s. The crate is pulled a distance of 7.5 m on the incline by a 150 N force. The acceleration of gravity is 9.8m/s² mu=0.15
A swift blow with the hand can break a pine board. As the hand hits the board, the kinetic energy of the hand is transformed into elastic potential energy of the bending board; if the board bends far enough, it breaks. what is the average force on..
A 50lb sack of portland cement is dropped from rest onto the scale from a height h = 4ft measured from the scale's plate
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