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The half-life for the α decay of uranium is 4.47 × 109 yr. Determine the age (in years) of a rock specimen that contains 61.2% of its original number of atoms.
A plastic bag is filled with helium at atmospheric pressure and 18.0 oC. Assume that the mass of the bag is negligible, what is the required volume of the balloon if the air inside can be maintained at 39.0 oC
A point charge +6.2uC is placed at the origin, and a second charge -3.9uC is placed in the x-y plane at (0.30m, 0.45m). Where a third charge should be placed in the plane so that the net force acting on it is zero
A thin film of material is layer on top of the glass. It has an index of refraction of 1.38. White light is incident normal to plane of film. Determine the frequency of green light in air
The atomic masses forSb andNb isotopes are 132.915250u and 97.910328u, respectively.
A man weighing 650 and a woman weighing 440 have same momentum. What is the ratio of the man's kinetic energy to that of the woman.
When 22.9 J was added as heat to a particular ideal gas, the volume of the gas changed from 54.3 cm3 to 100 cm3 while the pressure remained at 1.00 atm. By how much did the internal energy of the gas increase
During the spin-dry cycle of a washing machine, the motor speeds up from 30 rad/s to 95 rad/s, What is the magnitude of the angular acceleration of the motor
What is the stopping distance of the car. What is the initial (horizontal) velocity of the ball.
You are standing on the edge of a turntable with frictionless bearings. It is initially rotating when you catch a ball, which ismoving in the same direction but faster than you are moving and ona line tangent to the edge of the turntable.
Suppose your waffle iron is rated at 1.40 kW when connected to a 3.60 x 102 V source. What current does the waffle iron carry
q1. a planet of mass 4.00 1025 kg is in a circular orbit of radius 3.00 1011 m around a star. the star exerts a force
Robert has just bought a new model rocket, and is trying to measure its flight characteristics. how much work is done by the drag force on the rocket
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