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A person is observing the motion of a ball on a flat surface and measuring its position in time. His measurement shows that r(vector)= 1/2*t^2(ihat)+2t(jhat)
A second person is standing at a different location 10m east and 5m north of the first person.
What will the second person measure if he is to measure the position of the same ball?
What will be the velocity of the ball relatively to each of the two observers?
An eagle (mA = 4.3 kg) moving with speed vA = 7.8 m/s is on a collision course with a second eagle (mB = 5.6 kg) moving at vB = 10.2 m/s in a direction perpendicular to the first
A light ray enters a glass slab at point A at an angle of 58.6° with respect to the surface normal, What minimum value for the index of refraction of the glass can be inferred from this
A circular loop of wire with 10 turns, radius 0.241 m and resistance 0.235 Ohms is connected to a 13.1 V power supply. find The magnetic field at the center of this loop
A helium ion (Q = +2e) whose mass is 6.6×10?27kg is accelerated by a voltage of 3700V, What is its speed? Express your answer to two significant figures and include the appropriate units
A bird sitting in a tree is travelling at 40 km/s relative to the faraway Sun. When the bird drops to the ground below, does it still go 40 km/s, or does this speed become zero.
A pilot claims to have seen a UFO moving initially at a speed of about 374 m/s in an easterly direction and then, Compute the UFO's average acceleration during the turn
A soap film whose index of re%uFB02ecetion is 1.33 is suspended in air. When sunlight strikes the film nearly perpendicularly, two colors, Find the thickness of the film
A cylinder of length L = 18 cm and radius R = 5.4 cm has its center at the origin and its axis along the x axis such that one end is at x= +9 cm , What is the net charge inside the cylinder
a 66.0-kg woman in an elevator is accelerating upward at a rate of 2.8m/s^2. What is the net force acting on the woman
a sloenoid 3.0 cm long consists of 8013 loops of wire if the magnetic field inside the solenoid is 3.0 T, what is the magnitude of the current that flows through it
A solenoid 70 . 8 cm long has 640 turns and a radius of 2 . 34 cm. If it carries a current of 2 . 03 A, find the magnetic field along the axis at its center
A constant net force of 75N acts on an object initially at rest as it moves through a parallel distance of 0.60m. What is the final kinetic energy of the object
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