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A car travels up a hill at a constant speed of 41 km/h and returns down the hill at a constant speed of 80 km/h. Calculate the average speed (in km/h) for the round trip.
A tennis player hits a ball at ground level, giving it an initial velocity of 20.0 at 53.0 above the horizontal. What are the horizontal and vertical components of the ball's initial velocity? How high above the ground does the ball go? How long does..
A long cylindrical conducting shell has inner radius R1=10 cm and an outer radius R2=12 cm. the conductor has no net charge. At the center of the cylinder, there is a negative line of charge with linear charge density λ=5μc/m.
A 1500 car traveling at 11 suddenly runs out of gas while approaching the valley shown in the figure. The alert driver immediately puts the car in neutral so that it will roll. What will be the car’s speed as it coasts into the gas station on the oth..
The crest of the second hill is circular, with a radius of r = 35m. Avoid friction and air resistance. What must be the height h of the first hill so that skier just loses contact with the snow at the crest of the second hill.
a spherical body of mass m and charge q moves through a viscous medium at a constant speed a q ex under the influence
A ball is thrown directly up from the ground with speed vsub0. At the same time, a second ball is dropped from rest from a height H, straight above the point where the first ball was thrown upward. There is no air resistance. A) Find out the time at ..
An object is moving along a straight line and the uncertainty in its position is 1.5 m. Find the minimum uncertainty in the momentum of the object
an electron moves in a circular path perpendicular to a magnetic field of magnitude 0.295 t. if the kinetic energy of
A golf club strikes a 0.034-kg golf ball in order to launch it from the tee. With what speed does the ball leave the club
A doubly charged helium atom whose mass is 6.6 10 to 27 kg is accelerated by a voltage of 2200 V. What will be its radius of curvature if it moves in the plane perpendicular to a uniform 0.308 T field?
An electron (charge q = -1.6x10-19 C and mass m = 9.1x10-31) moving at speed v enters a region where a uniform magnetic field B = 1.9 × 10-4 T bends the path of the electron into a semicircle with radius of r = 3.5 cm as shown. What is the speed o..
A proton (mass m = 1.67 x 10-27 kg) is being accelerated along a straight line at 5.3 x 1011 m/s2 in a machine. If the proton has an initial speed of 7.5 x 105 m/s and travels 2.5 cm, what then is (a) its speed and (b) the increase in its kinetic ene..
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