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Suppose that an Egyptian farmer claims to have discovered a linen burial cloth used during Egypt's Middle Kingdom some 4000 years ago. Careful analysis shows that the cloth contains 80% of the 14C that it is estimated to have originally contained. How old is the cloth?
Find an expression for the electric potential at the center. A proton is released from rest in a uniform electric field of magnitude 1.20×10^5 N/C. Find the speed of the proton after it has traveled.
A prescription for a corrective lens calls for +1.50D. The lensmaker grinds the lens from a "blank" with n = 1.56 and a preformed convex front surface of radius of curvature of 40.0 cm. What should be the radius of curvature of the other surface?
A 10-cm-diameter cylinder of helium gas is 20 cm long and at 20°C. The pressure gauge reads 120 psi. how many helium atoms are in the cylinder? what is the mass of the helium?
A 24-V battery is connected in series with a resistor and an inductor, with R = 9.0 ? and L = 7.8 H, respectively, Find the energy stored in the inductor when the current reaches its maximum value
Two equal charges separated by a distance of 1 meter experience a repulsive force of 1,000 newtons. What is the strength in coulombs on each charge
The archerfish hunts by dislodging an unsuspecting insect from its resting place with a stream of water expelled from the fish's mouth, What is the vertical component of the water's initial velocity
What is the approximate mass of an object whose weight equals the force in part (b).
Suppose that the net horizontal force is because of rolling friction only and take the free-fall acceleration to be g = 9.80 m/s^2. What is the coefficient of friction for the tire under low pressure.
During the spin cycle of your clothes washer, Find the angular displacement of the tub during a spin of 82.9 s
1) Compute the change in the internal energy of a thermodynamic system under the following scenarios: (i) 50 J of heat added and 40 J work extracted, (ii) 50 J of heat added and 75 J work extracted,
A narrow beam of light with wavelengths from 450 nm to 700 nm is incident perpendicular to one face of a 40.00 degreee prism made of crown glass
An astronaut on a small planet wishes to measure the local value of g by timing pulses travelling down a wire which has a large object suspended from it. Imagine the wire of mass 3.80 g is 1.60 m long and has a 3.00-kg object suspended from it. A pul..
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