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An archeologist on a dig finds a fragment of an ancient basket woven from grass. Later, it is evaluated that the carbon-14content of the grass in the basket is 9.17% that of an equal carbon sample from present-day grass. Calculate the age of the basket?
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A skier is initially stationary, but then accelerates at 1.6 m/s2 down a hill that is inclined 21° below the horizontal. How far horizontally and vertically has the skier traveled in 9 s?
1. a calculate the efficiency of a carnot engine running between a low temperature of 27.0degc and a high temperature
When a potential difference of 166 V is applied to the plates of a parallel-plate capacitor, the plates carry a surface charge density of 32.0 nC/cm2. What is the spacing between plates.
Two grams of 100 degree C steam are injected into a wellsealed styrofoam container that holds a mixture of 24 grams of iceand 50 grams of liquid water, both at 0 degree C. How much of the ice melts and what is the equilibrium temperature of the mix..
A monatomic ideal gas in a rigid container is heated from 212 K to 305 K by adding 7840 J of heat
Assume that a honeybee is a sphere of diameter 1.000 cm with a charge of +49.0 pC uniformly spread over its surface. What is the magnitude of the net electrostatic force on the grain due to the bee
The minimum distance required to stop a car moving at 42.0 mi/h is 39.0 ft. What is the minimum stopping distance for the same car moving at 67.0 mi/h, assuming the similar rate of acceleration.
A tennis ball is thrown straight up with an initial speed of 20 m/s, What is the ball's acceleration at its maximum height
A horizontal force of magnitude 34.5 N pushes a block of mass 4.09 kg across a floor where the coefficient of kinetic friction is 0.609. During that displacement, the thermal energy of the block increases by 39.3 J. What is the increase in thermal ..
a 3.8 kg block is accelerated from rest by a compressed spring of spring constant 650 N/m. What is the original compression distance of the spring
A 71.6-kg bungee jumper jumps from a bridge. She is tied to a bungee cord whose unstretched length is 10.0 m, Calculate the maximum acceleration experienced by the jumper
An oak barrel with a lid of area 0.20 m2 is filled withwater. A long, thin tube of cross-sectional area 5.0 X10-5 m2 is inserted into a hole at the centerof the lid, and water is poured into the tube. When the waterreaches 12 m high, the barrel bu..
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