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A skateboarder shoots off a ramp with a velocity of 6.8 m/s, directed at an angle of 60 degree above the horizontal. The end of the ramp is 1.0 meter above the ground. Let the x axis be parallel to the ground, the +y direction be vertically upward, and take as the origin the point on the ground directly below the top of the ramp.
(a) Find how high above the ground is the highest point that the skateboarder reaches?
(b) When the skateboarder reaches the highest point, Find how far is this point horizontally from the end of the ramp?
An insect that is 5.30 mm long is placed 8.9 cm from a converging lens with a focal length of 12.0 cm. find the angular magnification if the lens is close to the eye
A 2 200-kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 4.20 m before coming into contact with the top of the beam, Find the magnitude upwards
A ray of light has an incident angle of 30.1 on a block of quartz and an angle of refraction of 20.4. what is the index of refraction for this block of quartz
A baseball is hit at ground level. The ball reaches its maximum height above ground level 3.0 s after being hit. Then 2.5s after reaching its maximum height, ball barely clears a fence that is 97m from where it was hit. Suppose the ground is level..
White light spans the wavelength range among about 400 nm and 700nm, If white light passes through two slits 0.31 mm apart and falls on a screen 1.3 m from the slits, discover the distance between the first-order violet and first-order red fringes.
Nichrome wire of cross-sectional radius 0.791 mm is to be used inwinding a heating coil. estimate the length of wire you must use to wind the coil
electrons move through a certain electric circuit at an average speed of 1.1 x 10-2 ms. how long in minutes does it
An RL circuit has a V=9V battery, a R=13000Ohm resistor, and a L=0.7H, connected in series with a switch. What percentage of the maximum current flows through the circuit at time t = 0.10769milliseconds
It is said that Galileo discovered a basic principle of the pendulum - that the period is independent of the amplitude, How long is the lamp chain?
The angular momentum of a flywheel having a rotational inertia of 0.125 kgm2 decreases from 3.0 to 2.0 kgm2/s in a period of 1.5 s. How much work was done on the wheel
Riders on the "Great American Revolution" loop-the-loop roller coaster wear seatbelts as the roller coaster negotiates its 6.5m -radius loop with a speed of 9.8m/s.
A person can see clearly up close, but cannot focus on objects beyond 82.0cm . She opts for contact lenses to correct her vision. Is she nearsighted or farsighted
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