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Three forces act on a moving object. One force has a magnitudeof 72.3 N and is directed due north. Another has a magnitude of52.7 N and is directed due west. What must be (a) the magnitude and (b) the direction of the third force, such that the object continues to move with a constantvelocity? Express your answer as a positive angle south of east.
A box of mass 72.0 kg is connected to a second box with a mass of 34.0 kg. find the magnitude of the tension in the string between the two boxes
A resonant circuit in a radio receiver is tuned to a certain station when the inductor has a value of 1.50 µH and the capacitor has a value of 2.20 pF. Find the frequency of the radio station
A pipe is horizontal and carries oil that has a viscosity of 0.15 Pa · s. The volume flow rate of the oil is 5.8 10-5 m3/s. What is the absolute pressure at the input end
Suppose that an electron trapped in a one-dimensional infinite well of width 322 pm is excited from its first excited state to the state with n = 5. What energy (in eV) must be transferred to the electron for this quantum jump
Muons are created in the atmosphere by collisions of cosmic rays (mostly high energy protons) with air molecules. Muons have a rest energy of 105.7 MeV and a half life in the laboratory frame of 1.4μs. This lifetime can be increased indefinitely b..
What is the electric potential between the two terminals. A capacitor is formed by placing a 20 cm long charge carrier charged to +10nC placed 5cm away from and parallel to a 20 cm long charge carrier charged to -10 nC. Find the electric field at 1..
When a portable fan is first turned on it draws 4.62 A. After it has come up to speed it draws 0.55 A. calculate the back emf while the motor is running
Two long parallel wires carry currents of 3.95 A and 4.77 A. The magnitude of the force per unit lengh acting on each wire is 6.85 × 10-5 N/m. Find the separation distance of the wires expressed in millimeters
2 kg block slides on a rough horizontal surface. the block hits a spring with a speed of 2.4 m/s and compresses it a distance of 11 cm before coming to rest. what is the force constant of the spring
The brakes are applied and the bicycle is brought to a uniform speed. During braking , the bicycle covers a translational distance of 10m, Evaluate how many turns that each wheel would make during braking.
A major-league pitcher can throw a ball in excess of 41.5 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches a catcher who is 17.0 m away from the point of release
If the distance to a point source of sound is doubled, by what multiplicative factor does the intensity change
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