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Find at what height above the earth is the acceleration due to gravity 15 percent of its value at the surface? Find the speed of a satellite orbiting at that height?
LASIK eye surgery uses pulses of laser light to shave off tissue from the cornea, reshaping it. What is the power of one laser pulse
question1a 100 kg of water in a closed insulated autoclave is heated from 20 to 90 degc by a heating coil made of 12 m
The force constant of a spring is 600 N/m and the unscratched length is 0.72 m. A 3.2-kg block is suspended from the spring. An external force slowly pulls the block down, until the spring has been stretched to a length of 0.86 m.
In an English carnival game, you throw a ball at a coconut on a stand 4.0 m in front of you and 1.0 m above the point at which you release the ball. How long is the ball in the air in each case
Three, and only three, bright fringes can be seen on either side of the central maximum when a grating is illuminated with light ( = 430 nm)
A classroom demonstration is done with an Atwood machine. The masses are m1 = 1.0 kg and m2 = 1.10 kg. what is the acceleration of gravity at that place
a battery with an emf of 12.00 v has an internal resistance r. when connected to a resistor r the terminal voltage is
Assume a certain concave, spherical mirror has a focal length of 10.0 cm. What location does the image approach as the object gets arbitrarily far away from the mirror?
The maximum wavelength an electromagnetic wave can have and still eject an electron from a copper surface is 264 nm
An object is placed to the left of a lens, and a real image is formed to the right of the lens. The image is inverted relative to the object and is one-half the size of the object. The distance among the object and the image is 47.9cm.
In the days before compact discs and MP3 players (ancient history!), music was recorded in scratches in the surface of vinyl-coated disks called records. Find the centripetal acceleration of a point on the edge of the record
A setup similar to the one shown in the figure below is often used in hospitals to support and apply a horizontal traction force to an injured leg. Determine the force of tension in the rope supporting the leg
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