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A projectile is fired from ground at an angle 60 degrees above horizontal to hit a target on the wall, which is 25.0 m away. The target is 18.0 m above the ground
(a) Find the initial speed of the projectile;
(b) Find the time of flight of the projectile;
(c) Calculate the magnitude and direction of the projectile's velocity at the instant when it hits the target. (Hint: the projectile may not hit the target horizontally)
On a frozen pond, a 11.3 kg sled is given a kick that imparts to it an initial speed of v0 = 1.69 m/s. Use the work kinetic energy theorem to find the distance the sled moves before coming to rest
parachutist with a camera, both descending at a speed of 13 m/s, releases that camera at an altitude of 110-m.
A 170, 35.0 cm-diameter turntables rotate on frictionless bearings at 53.0. A 20.0 block sits at the center of turntable. A compressed spring shoots the block completely outward along a frictionless groove in the surface of the turntable.
The frequency doubled output of a Nd3+ YAG laser has a wavelength of 532nm. If each pulse of light has a total energy of 0.550J and the repetition rate of the laser is 30Hz, how many photons does the laser emit at 532nm in 3 minutes?
An uncharged capacitor is connected to the terminals of a 2.0V battery, and 9.0?C flows to the positive plate, How much additional charge flows to the positive plate
Find the moment of inertia of a uniform plate shaped like a quarter of a circle of radius R, made to rotate around the square corner (with the rotation axis perpendicular to the plate)
A point charge q1=5microC and is fixed in place. From a horizontal distance of 6cm a small sphere of mass 0.004 kg and charge q2=2microC is fired towards the fixed charge at 40 m/s. What is the acceleration of the sphere when it is traveling 25 m/..
You are designing a pendulum clock whose period can be adjusted by ±10% by changing the length of the pendulum. Determine the range of change of length which provide this flexibility in the period
A small object is located 31.6{\rm cm} in front of a concave mirror with a radius of curvature of 39.0{\rm cm}. Where will the image be formed
A spacecraft approaching the earth launches an exploration vehicle. What is the speed of the exploration vehicle relative to the spaceship
A standing wave is set up by reflecting radio waves from a large, flat metal dish. Where are the corresponding maxima in the magnetic field
If 0.040kg of ice at 0 C is added to 0.390kg of water at 30 C in a 0.130-kg aluminum calorimeter cup
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