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The position of an object as a function of time is given by x = At2 - Bt + C, where A = 7.5 m/s2, B = 6.2 m/s, and C = 3.9 m. Find the instantaneous velocity and acceleration as functions of time. (Use the following as necessary: t.).
Consider a spacecraft in an elliptical orbit around the earth. At the low point, or perigee, of its orbit, it is 300km above the earth's surface; What is the period of the spacecraft's orbit
A 12.0-cm diameter loop of wire is initially oriented perpendicular to a 1.5-T magnetic filed. What is the average induced emf in the loop
A 7.5cm diameter circular loop of wire is in a 0.76T magnetic field. The loop is removed from the field in 0.21s, What is the average induced emf
A gas undergoes two processes. In the first, the volume remains constant at 0.230m3, Find the total work done by the gas during both processes
As a protest against the umpire's calls, a baseball pitcher throws a ball straight up into the air at a speed of 17.0 m/s. find the force he exerts on the ball to give it this upward speed
q1. a woman is riding a boat at the speed of v when she notices a seawall straight ahead. the farthest she can lean the
Two friends hold on to a rope, one at each end, on a smooth, frictionless ice surface. What is the magnitude of the angular momentum of the system comprised of the two friends
A horizontal power line of length 58.2 m carries a current of 2.18 kA northward .The Earth's magnetic field at this location has a magnitude of 5.30 X10^-5 T. Find the magnitude of the magnetic force on the power line
What is the average induced emf in the coil in mV. If he is crossing a river where the current is 1.60 km/h, in what direction should his boat be headed if he wants to reach the point directly opposite his starting point.
Treating our rigid legged friend as a particle, what is the average force his feet exert on the ground when he slows down.
Use the simulation in the cannon interactive in this section to answer the following questions. (a) Does cannonball's horizontal velocity change as it moves through the air? (b) Does its vertical velocity change? (c) If you enhance the cannonball's h..
You have a set of converging lenses with focal lengths 2.00 cm, 12.0 cm, 58.5 cm, and 77.5cm. What is the angular magnification of the telescope
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