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A skateboarder shoots off a ramp with a velocity of 5.8 m/s,directed at an angle of 54° above the horizontal. The end ofthe ramp is 1.3 m above the ground. Let the x axis beparallel to the ground, the +y direction be verticallyupward, and take as the origin the point on the ground directlybelow the top of the ramp. (a) How high above the ground is the highest point that the skateboarder reaches?
An open flask sitting in a lab fridge looks empty, but we know that actually it is filled with a mixture of gases called air. If the flask volume is 0.00415 m3 and the air is at standard temperature and pressure, how many gas molecules does the flask..
A 7 kg ball is lifted from the ground to a height of 45 meters above the ground. The ball is then dropped. After the ball has fallen 5.5 m, what is it's PE and KE and how fast is it going?
A wheel released from rest is rotating with constant angular acceleration of 2.7 rad/s2. (a) After 4.5 s, what is its angular velocity? in rad/s (b) Through what angle has the wheel turned? in rad
Light of wavelength 5.10 multiply.gif 102 nm passes through a slit of width 0.210 mm. Determine the width of the first-order bright fringe
Calculate for a rectangular surface with the vertices (b,a/sqrt(2),0), (0,a/sqrt(2),0), (0,0,a/sqrt(2)), and (b,0,a/sqrt(2)) the vectorial surface element dS (Hint: Find first a suitable parametrization of the surface).
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.
Two parallel wires are 5 m long. They are seperated by a perpendicular distance of 1 cm and carry currents of 20 A, Find the interaction force between the wires
Two identical diverging lenses are separated by 15 cm. The focal length of each lens is -8.0 cm. Determine the final image distance relative to the lens on the right
An ideal gas is expanded isothermally from 20L to 30L. During thismethod , 6J of energy is expended by the external mechanism that expanded the gas. Which of the statements is correct.
You melted a copper cylinder of volume 15.0 cm3 to fabricate a thin wire of diameter 0.02 mm. What will be the length of wire formed
the velocity of a boat with respect to the water is 4.0 m/s at an angle of 30.0 degrees North of East. What is the velocity of the boat
The middle C string on a piano is under a tension of 706 N. The period and wavelength of a wave on thisstring are 3.82 10-3 sand 1.26 m, respectively. Find the linear density of the string
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