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A flywheel is rotating at 1950 rpm when a brake is applied for 3.72 s. If the magnitude of the angular acceleration is 4.81 rad/s2, obtain the final angular velocity in rpm?
A subway train rounds an unbanked curve at 70 km/h. Find what is the radius of the turn
As a function of time, the velocity of the football can be written as . (If the acceleration of an object is constant, find the average acceleration vector of the football
A 4.7-g object moving to the right at 18 cm/s makes an elastic head-on collision with a 9.4-g object that is initially at rest. What is the velocity of the 4.7-g mass after the collision
As you stand by the side of the road, a car approaches you at aconstant speed, sounding its horn, and you hear a frequency of 80Hz. What is the speed of the car
Find the forces that act on each of the three charges. a) q = -1.0 µC in vector form b) q= 3 µC in vector form b) q =5 µC in vector.
An inductor has inductance of 0.400 H and carries a current that is decreasing at a uniform rate of 25 mA/s. Determine the self-induced emf in this inductor
A capacitor is placed parallel across a resistive load in a circuit. C=0.858*10^-6F and R=204 ohms. What fraction of the current goes through the capacitor
A football kicker can give the ball an initial speed of 24 m/s. He is 54 m from the goalpost which has a crossbar 3.46 m high. What is the smallest angle of elevation
In the bohr model of the hydrogen atom an electron (mass 9.1*10^-31kg) orbits a proton at a distance of 5.3*10^-11 m. The protonpulls on the electron with an electrical force of 8.2*10^-8 N. How many revolutions per second does the electron make?
Ship A is located 3.2 km north and 2.1 km east of ship B. Ship A has a velocity of 22 km/h toward the south and ship B has a velocity of 40 km/h in a direction 37° north of east. At what time is the separation between the ships least
A hydrogen atom emits a photon of energy 3.4 eV. If the atom is at rest before emitting the photon, find what is the speed of the atom after emission
A point source of light illuminates an aperture 2.00m away. How wide is the aperture
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