Wednesday
June 19, 2013

# Posts by Confused

Total # Posts: 283

Physics
Which of the following is an example of diffuse reflection? light reflected from the surface of a dry asphalt roadway light reflected from the surface of a calm lake light reflected from the surface of glossy paper light reflected from the surface of a shiny metal plate

Physics
When the pendulum bob reaches the mean position, the net force acting on it is zero. Why then does it swing past the mean position?

Physics
A tennis ball is dropped from 1.80 m above the ground. It rebounds to a height of 1.00 m (assume down to be negative). (a) With what velocity does it hit the ground? (b) With what velocity does it leave the ground? (c) If the tennis ball were in contact with the ground for 0.0...

An astronaut drops a golf ball to the surface of the moon from a height of 1.5m. The golf ball has a velocity of 2.24 m/s right before it lands on the moon (assume this height to be zero). What is acceleration due to gravity on the moon?

At the top of the Washington monument, a bird drops an acorn into the reflecting pool 169m below. If the acorn has a massof 1.0 kg, with what velocity would it hit the water?

A fiery ball of wood is loaded into a medieval catapult to be thrown into a castle. Unfortunately, the attacking heathens are not very smart and since geometry and physics were not studied in their time, they launched the ball straight up into the air. The catapult launcher si...

APS
The Marshmellow man tromps along the streets of New York City with his blue sailor hat on. He tries to climb up a building to reach Ghostbusters and a gargoyle statue falls 326m to the street below. What height is the gargoyle when it reaches a velocity of 59 m/s?

APS
Ben eats a bowl of rice as he walks across the San Francisco Bridge. When he is finished, he drops his empty bowl 67m down to the bay water. What speed does it hit the water with?

chemistry
Provide a synthesis of the following aldehyde starting from ethylene. Show the reagents and products for each step. H2C=CH2 --> CH3-CH2-CH=O Try to be as clear as possible. Thanks!

Chemistry
What alkane effuses at 1/5 the rate of He

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