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A skateboarder shoots off a ramp with a velocity of 5.1 m/s,directed at an angle of 59° above the horizontal. The end ofthe ramp is 1.4 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 theground is the highest point that the skateboarder reaches?(b) When the skateboarder reaches the highestpoint, how far is this point horizontally from the end of the ramp?
Two spherical balls have volumes in the ratio of 27:1. What is the ratio of their surface areas
A person who weighs 715 N is riding a 98-N mountain bike. Suppose the entire weight of the rider and bike is supported equally by the two tires. estimate the area of contact between each tire and the ground
An electron starts from rest 2.88 cm from the center of a uniformly charged sphere of radius 1.99 cm. how fast will the electron be moving when it reaches the surface of the sphere
A nozzle of inner radius 1.05 mm is connected to a hose of inner radius 7.96 mm. The nozzle shoots out water moving at 25.5 m/s. What is the volume flow rate
A +44 nC charge is placed on the z- axis at (0,0,5 cm). A grounded conducting plane fills the x-y plane where z=0. A) Find the surface charge charge density on the conducting plane at the origin.
A 56.0 kg person jumps from rest off the 9.0 m high tower straight down into the water. Neglect air resistance throughout the descent. She comes to rest 3.40 m under the surface of the water. Find out the magnitude of the average force that the water..
An air puck of mass m1 = 0.23 kg is tied to a string and allowed to revolve in a circle of radius R = 1.3 m on a frictionless horizontal table.
A pulsed laser emits light in a series of short pulses, each having a duration of 23.0 ms. The average power of each pulse is 4.70 mW, Find the number of photons in each pulse
what is the emf generated in the square loop as it is moved to the right in 0.2s out of the 0.8 T magnetic field? what is the intensity of the wave
A body oscillates with simple harmonic motion according to x = (9.0 m) cos[(3.0pi rad/s)t + pi/3 rad]. What is the period of the motion
An object 3.4 mm tall is placed 25cm from the vertex of of a convex spherical mirror. how far is the image from the vertex of the mirror
The medical profession divides the ultraviolet region of the electromagnetic spectrum into three bands: UVA (320-420 nm), UVB (290-320 nm), and UVC (100-290 nm). Find the frequency range associated with UVB radiation
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