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An archeologist on a dig finds a fragment of an ancient basketwoven from grass. Later, it is determined that the carbon-14content of the grass in the basket is 9.93% that of anequal carbon sample from present-day grass. What is the age of thebasket?
A gas of 1.50×10^20 atoms or molecules has 0.900 J of thermal energy. evaluate the temperature of the gas
What was the average acceleration throughout the trip
Basketball player Darrell Griffith is on record as attaining a standing vertical jump of 1.2 m. What is his speed as he leaves the floor
a 50 kg sprinter, starting from rest, runs 50 m in 7.0 s at a constant acceleration. what is the sprinter's power output during the final 2.0 s
A sled with a mass of 8.00 kg moves in a straight line on a frictionless horizontal surface. find the force acting on the sled
A tennis ball is shot vertically upward from the surface of an atmosphere-free planet with an initial speed of 20.0 m/s. How long has the ball been in the air when it returns to its original position
You know your mass is 70kg , but when you stand on a bathroom scale in an elevator, it says your mass is 94kg . What is the acceleration of the elevator
A 145 g copper bowl contains 205 g of water, both at 20°C. A very hot 300 g copper cylinder is dropped into the water, causing the water to boil, with 5.40 g being converted to steam.
Consider a hypothetical universe in which the electron hasspin 3/2 rather than spin 1/2. Draw n enegy level diagram for the n=3 states of hydrogen,neglecting fine structure and hyperfine strucure. Label the states by the appropriate quantum nubers..
The position vector of a particle of mass 2.10 kg as a function of time is given by rarrowbold = (6.00 ihatbold + 4.00 t jhat bold), Determine the angular momentum of the particle
A 10.0-kW laser with a beam area of 10.0 cm2 is incident normally on a mirror. Assuming perfect reflection, what is the force due to radiation pressure on the mirror
A 70 kg painter holding a 15 kg paint is climbing up a 30 m-long ladder, which weighs 20 kg, against a frictionless wall at an angle of 60 degree. how far could the painter go up along the ladder
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