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A projectile is launch from the ground level at an angle of 12.0 degrees above the horizontal. It returns to ground level. To what value should the launch angle be adjusted, without changing the launch speed, so that the range doubles?
Find the angular velocity of a clock's second hand and the linear speed and linear acceleration of a point on the second hand 2.37 cm from the rotation axis
The pressure in a traveling sound wave is given by the following equation. p = (2.1 Pa) sin ?[(1.40 m-1)x - (280 s-1)t], Find the pressure amplitude and Find the wavelength
In a college homecoming competition, eighteen students lift a sports car. Though holding the car off the ground, each student exerts an upward force of 390 N. What is the mass of the car in kilograms? What is its weight in pounds.
A duck is floating on a lake with 28% of its volume beneath the water. What is the average density of the duck
An experimental flywheel, used to store energy and replace an automobile engine, is a solid disk of mass 211 kg and radius 0.380 m. What is its rotational inertia? When driving at 20.6 m/s (46.1 mph), the fully energized flywheel is rotating at an..
When only a resistor is connected across the terminals of an ac generator (117 V) that has a fixed frequency, there is a current of 0.490 A in the resistor. calculate the impedance of the series combination
A rapidly spinning paddle wheel raises the temperature of 600mL of water from 21C to 25C. How much work is done in this process
A concave spherical mirror has a radius of curvature of 0.72 m. An object placed in front ofthe mirror is 0.30 m tall. Find the height of the image formed
A dog sitting 3.7m from a vertical mirror thinks its image is another dog. How far is the image from the dog
A spaceship is observed by a stationary observer to be moving at .6 c. How fast does the laser beam travel relative to the observer
The rope is initially swung around the axis, causing the wood to have a tangential velocity of 4.0 m/s. After one revolution the wood is observed to have a speed of only 2.1 m/s.
a golf ball is struck with a five iron on level ground. it lands 91.8 m away 4.20 s later. what was a the direction and
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