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Assume the decay constant of radioactive substance C is double the decay constant of radioactive substance D. If substance D has a half-life of 4 hour, determine what is the half-life of substance C?
A projectile is fired at an upward angle of 45° from the topof a 288 m cliff with a speed of212 m/s. What will be its speed when itstrikes the ground below? (Use conservation of energy.)
Consider a model thermodynamic system in which the allowed (nondegeerate) energy levels are 0, E, 2E, 3E. Compute the average occupation numbers for each energy level
For a coal gasification project being planned, 26,000 tons of coal per day is used to produce 250,000,000 cubic feet per day of natural gas. If the coal is rated at 8700 Btu/lb and the gas at 950 Btu/cubic ft, what will be the efficiency of this plan..
The near point of a naked eye is 25 cm. When placed at the near point and viewed by the naked eye, a tiny object would have an angular size of 5.2 10-5 rad. Find the focal length of the eyepiece in cm
A 45 g golf ball is pushed up a 30° ramp. The ball starts from rest and the length of the surface of the ramp is 5 m. What was the magnitude of the pushing force
The air-release flap on a hot-air balloon is used to release hot air from the balloon when appropriate. On one hot-air balloon, the air release openings has an area of 0.5 m^2, and the filling opening has an area of 1 m^2.
Your friend can barely lift a 36-kg concrete block on Earth. How massive a block could she lift on the Mercury
A simple pendulum is 4.00 m long. What is the period of simple harmonic motion for this pendulum if it is hanging in an elevatoraccelerating upward at 7.00m/s2
How greatly time elapses before the compass hits the ground
An 800 g ball moves in a vertical circle on a 1.07-m-long string. If the speed at the top is 5-m/s, after that the speed at the bottom would be 8.18 m/s.
Johnny Jumper's favorite trick is to step out of his high-rise window and fall 37.0 m into a pool. Find Johnny's de Broglie wavelength at this moment
An electron is inside a solenoid, 28 cm from the solenoid axis. At what rate is the solenoid's magnetic field changing
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