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Q. A wooden artifact is found in an ancient tomb. Its carbon-14(146C) activity is measured to be64.0% of that ina fresh sample of wood from the same region. Assuming the sameamount of 14C was initially present in the wood fromwhich the artifact was made, determine the age of the artifact.
Q. The surface of the Sun has a temperature of about 5 800 K. The radius of the Sun is 6.96 108 m. Calculate the total energy radiated by the Sun each second. Assume that the emissivity of the Sun is 0.986.
If vector "B" is added to vector C =3.0i + 4.0J, the result is a vector in the positive direction of the y axis, with a magnitude equal to that of vector "C". What is the magnitude of vector "B".
A source produces sound waves of time period .001 second and wave length of 20 cm. find the time taken by sound waves to travel a distance of 800 metres.
A solid block of mass m2 = 0.5 , at rest on a horizontal frictionless surface, is linked to a relaxed spring (with spring constant k = 150 whose other end is fixed. Another solid block of mass m1 = 2.4 and speed v1 = 2.2 collides with the 0.50 blo..
the fact that it moves very slowly by sky would probably cause it to be named after Yurtle, the god of turtles.
If 20 grams of hot water at 80°C is poured into a cavity in a very large block of ice at 0°C, what will be the final temperature of the water in the cavity? How much ice should melt in order to cool the hot water down to this temerature.
A 200 gm block of metal is heated to 100 degrees Celcius in boiling water. This block is after placed in an aluminum calorimeter cup (mass - 30gm; c - .22 cal/g degrees C) containing 180 gm of water at 20 degrees C.
A flat sheet of crystalline quartz has a thickness of 3.7cm. It is on top of a flat sheet of diamond that has a thickness of 2.6cm. Light strikes the crystalline quartz vertically and travels through it and then through the diamond.
What are the corresponding velocity vectors
our little sister builds 2 tree houses and stretches a rope between them for sending messages to other tree house. She hangs a mass of 1.4kg on one end of the rope that passes over the pulley.
An object has a kinetic energy of 317 J and the momentum of magnitude 24.0 kg · m/s.
Calculate the total cost ($/kWh) of electricity delivered to the grid including fuel cost and debt charge with O&M of 5% added to the total.
To demonstrate the tremendous acceleration of a top fuel drag racer, you attempt to run your car into the back of a dragster that is "burning out" at red light before the start of a race. (Burning out means spinning the tires at high speed to heat..
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