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After a plant or animal dies, its 14C content decreases with a half-life of 5730 years. If an archaeologist finds an ancient firepit containing partially consumed firewood, and the 14C content of the wood is only 13.1% that of an equal carbon sample from a present-day tree, what is the age of the ancient site?
q1. presume the gravitational field vector of a spherically symmetric mass distribution is a constant i.e. independent
A piano tuner sounds two strings simultaneously. One has been previously tuned to vibrate at 292.0 Hz. The tuner hears 4.0 beats per second. What was the original frequency of the untuned string
A small button placed on a horizontal rotating platform with diameter 0.326m will revolve with the platform when it is brought up to a rotational speed of 43.0rev/min, How far from the axis can the button be placed, without slipping,
A person sees clearly wearing eyeglasses that have a power of -5.00 diopters, If the person wants to switch to contact lenses placed directly on the eyes, what lens power should be prescribed
Two lightbulbs operate on the same potential difference. Bulb A has four times the power output of bulb B. What is the ratio of the current in bulb A to the current in bulb B?
A weather balloon contains 12.0 m3 of hydrogen gas when the balloon is released from a location at which the temperature is 22.0°C, what is the new volume of the balloon
A light ray initially in water enters a transparent substance at an angle of incidence of 39.0°, Calculate the speed of light in the transparent substance
A stone is thrown into the air with an initial velocity of 50 m/s at 37degress to the horizontal, find the total horizontal distance it travels
A ferryboat transports tourists among three islands. It sails from the first island to the second island, 5.78 km away, Calculate the distance between the first and third islands
Find the electric field at the top point of a right circular solid cone of charge Q, uniform density. The cone has a radius a and a height h.
Your physics TA has a far point of 0.711 m from her eyes and is able to see distant objects in focus when wearing glasses with a refractive power of ?1.47 D. Determine the distance between her glasses and eyes
A 14.1- resistor, a 11.8-?F capacitor, and a 18.8-mH inductor are connected in series with a 121-V generator. At what frequency is the current a maximum
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