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The bond energies in our genetic molecules (DNA) are about 300 kJ/mole. When DNA absorbs a sufficiently energetic photon it can break bonds, and reactions can happen that lead to cancer. Show by a calculation why ultraviolet light exposure is a cancer risk and explain your reasoning.
How much energy can this capacitor store without breaking down
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An ideal monatomic gas in a volume undergoes an adiabatic change from P1 = 8.2 × 105-Pa and V1 = 0.17-m3 to triple its initial volume. How much work is done on the gas?
Shaving/makeup mirrors typically have one flat and one concave(magnifying) surface. You find that you can project a magnified image of a lightbulb onto the wall of your bathroom if you hold themirror 1.6 m from the bulb and 3.8 m from the wall.
A 200 g block hangs from a spring with spring constant 10 N/m. At t=0 s the block is 23 cm below the equilibrium point and moving upward with the speed of 125 cm/s. What are block's oscillation frequency? What is the block's distance from equilibri..
Two positive point charges, qA and qB, (masses mA and mB) are at rest, held together by a mass less string of length a. How fast is each one going, when they are far apart
How long does this pendulum take for one oscillation? Presume that all displacement angles are small.
Although the cross-sectional area of a capillary is much smaller than that of the aorta, there are many capillaries, so their total cross-sectional area is much larger. If all the blood from the aorta flows into the capillaries and the speed of fl..
A ball is thrown from a point 1.0 m above the ground. The initial velocity is 19.5 m/s at an angle of 27.0° above the horizontal. Find the maximum height of the ball above the ground
questionin everyday life we know that something described as white hot is hotter than something described as red hot.
A small grinding wheel has a moment of inertia of 4.0 × 105 kgm2. What net torque must be applied to the wheel
A 0.12 m3 rigid tank initially contains refrigerant R-134a at 1 MPa and 100% quality. find the mass of the refrigerant that has entered the tank
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