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A projectile is fired at 50.0 o above the horizontal. Its initial speed is equal to 107.5 m/s. Assume that the free-fall acceleration is constant throughout and that the effects of the air can be ignored. What is the maximum height reached by the projectile?
Sheena can row a boat at 2.95 mi/h in still water. She needs to cross a river that is 1.17 mi wide with a current flowing at 1.79 mi/h. Not having her calculator ready, she guesses that to go straight across, she should head 60.0° upstream.
How fast would it be moving after it had fallen a distance of 0.010-m? (Assume that the gravitational force is constant over the distance of the fall, and that the star is not rotating.)
A total of 2.99·106 electrons are placed on an initially uncharged wire of length 2.25 m. a) What is the magnitude of the electric field a perpendicular distance of 0.494 m away from the midpoint of the wire? b) What is the magnitude of the accele..
It then increases it's speed at the rate of 1.55 m/s2. Find out the magnitude of acceleration under these new conditions. Answer in units m/s2.
What is the electric field at 9.4 cm from the central axis. What is the overall magnification of microscope.
A thin, horizontal, 10-cm-diameter copper plate is charged to 3.5nC. If the electrons are uniformly distributed on the surface, what are the strengths and direction of the electric field
Three point charges are fixed to rectangular coordinate system, Calculate the magnitude and direction of the net electrostatic force on the charge on the x-axis
The distance between the lenses in a compound microscope is 18 cm. The focal length of the objective is 1.5 cm. what must be the focal length of the eyepiece
A circular loop of wire having a radius of 6.0 cm carries a current of 0.14 A. A unit vector parallel to the dipole moment of the loop is given by 0.40i -0.92j, Find the magnetic potential energy of the loop
What is the magnitude of the average force of the bat on the ball throughout the ball-bat contact.
An airplane has a mass of 2.6 x10^6 kg, and the air flows past the lower surface of the wings at 95m/s. If the wings have a surface area of 1200m2, how fast should the air flow over the upper surface of the wing if the plane is to stay in the air?..
A 69-kg lumberjack stands at one end of a 409-kg floating log, as shown in the figure. Both the log and the lumberjack are at rest initially. calculate the lumberjacks speed relative to the shore
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