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An object in equilibrimhas three forces exerted on it. A 33N force acts at 90 degrees and a 44N force acts at 60 degrees. What is the magnitude and direction of the third force?
Suppose that the electric potential outside a living cell is higher than that inside the cell by 0.069 V. How much work is done by the electric force
An electron is moving to the north with a speed of 325 m/s when it encounters a magnetic field of 5 x 10^-5 T. What is the direction of the magnetic force acting on this particle
A plane, diving with constant speed at an angle of 40.7° with the vertical, releases a projectile at an altitude of 622 m. How far does the projectile travel horizontally during its flight
An object of heat capacity 100 cal/C is initially at 30.0C. Estimate the resulting entropy change of the universe
What least number of grooves is required for a grating
An archer puts a 0.54 kg arrow to the bowstring. An average force of 202 N is exerted to draw the string back 1.3 m. suppose that air resistance is negligible.
A 13.0 mu F capacitor is connected to a power supply that keeps a constant potential difference of 26.0 V across the plates. By how much did the energy change during the insertion
A 450 kg dragster accelerates from rest to a final speed of 120 m/s in 400 m, What is its average power output in watts and horsepower if this takes 7.30 s
A point charge of +7.6? C is located 0.27 m from a second point charge of -4.9? C. What is the absolute magnitude of the force on each charge
Two pure tones are sounded together. The periods of their pressure variations are 0.0151 s and 0.0159 s, What is the beat frequency
On aircraft carriers, catapults are used to accelerate jet aircraft to flight speeds in a short distance. How large is the force that the catapult must exert on the jet
A fluid in an insulated, flexible bottle is heated by a high resistance wire and expands. If 9kJ of heat is applied to the system and it does 5kJ of work, how much does the internal energy change?
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