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A person walks first at a constant speed of 4.80 m/s along a straight line from point circle a to point circle b and then back along the line from circle b to circle a at a constant speed of 3.15 m/s.
(a) What is her average speed over the entire trip?
(b) What is her average velocity over the entire trip?
an object of unknown mass is attached to an ideal spring with force constant 120 nm and is found to vibrate with a
An electron (charge -e) is projected horizontally into the space between two oppositely charged parallel plates. The electric field between the plates is 462N/C upward.
A 500 kg elevator starts from rest. It moves upward for 2.00 s with constant acceleration until it reaches its cruising speed, 1.75 m/s. What is the average power of the elevator motor during this period
A long, straight wire carries a current of 51 A. The magnetic field produced by this current at a certain point is 9.5 x 10-5 T. How far is the point from the wire
A person of mass 75 stands at the center of a rotating merry-go-round platform of radius 2.8 and moment of inertia 920. The platform rotates without friction with angular velocity 1.78. The person walks radially to the edge of the platform. Compute a..
When the brakes of a certain car are applied, a deceleration of 6.0 m/s^2 is produced. How far will it travel in that time
question when two moles of hydrogen and one mole of oxygen react to form two moles of water the energy released is 485
From rest, a 26.7 kg child is sliding down a 5.12 meter long playground slide in a time of 1.98 seconds. Calculate the value of kinetic friction
A 25 gram ball is fired with an initial speed v1 toward a 125 gram ball that is hanging motionless from a 1.25 meter string. The balls have a perfectly elastic collision. As a result, the 125 gram ball swings out until the string makes an angle of..
Determine the mutual inductance per unit length between two long solenoids, one inside the other, whose radii are r1 and r2 (r2
The electrons in the beam of a television tube have a kineticenergy of 2.36 x 10-15J. What is the acceleration of an electron due to this field component
Then a second inductance L2 =10 mH is connected in parallel with L1. Find out (a) the current that the generator delivers to L1 and (b) to the parallel combination.
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