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An elastic collision occurs between two air hockey pucks in which one puck is at rest and the other is moving with a speed of 0.7 m/s. After the collision, the puck initially in motion makes an angle of 20.00o with its original direction, and the struck puck moves at an angle of 70.00o on the other side of the original direction. What is the final speed of the first puck? What is the speed of the second?
A person whose eyes are 1.7 m above the floor stands in front of a plane mirror. How far above the floor should the bottom edge of the mirror be placed
An insulated Thermos contains 123 cm3 of hot coffee at 73 °C. You put a 12.0 g ice cube at its melting point to cool coffee. By how various degrees has your coffee cooled one time the ice has melted and equilibrium is reached? Treat the coffee as tho..
A certain car is capable of accelerating at a rate of 0.53 m/s2. How long does it take for this car to go from a speed of 50 mi/h to a speed of 61 mi/h
a rock is dropped into an abandon mine and a splash is heard 10 s later. how fast the rock was falling when it hit the water
a sample of rock from an asteroid is assayed and found to contain 3.62 parts per million uranium, how old is this sample
A boat takes 3.2 hours to travel 50 km down a river, then 4.6 hours to return. How fast is the river flowing
a 120kg horizontal flywheel with a 0.5m radius rotates friction-free about an axis through its center. what is the angular acceleration of the flywheel
The ratio of specific heat is 7/5 for air. If we expand one mole of air initially at 300 K to a final volume twice the initial volume without heat exchange, What is the final temperature
From a cliff that is 9.4 m above a lake, a young woman (mass 44 kg) jumps from rest, straight down into the water. At the instant she strikes the water, what is her de Broglie wavelength.
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)
Consider a hydrogen atom in a magnetic field. Sketch the possible transitions among the n = 3, l = 2 and n = 2 and l = 1 levels. Which lines will not appear if we need that Δm = 1,0, and -1 only? How many spectral lines with dissimilar frequencies wi..
A large tanker truck can carry 30 ton (30,000lbs)of liquid. What volume of water can it carry
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