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The heat and light radiated by stars is the result of fusion, the process in which energy is released when hydrogen nuclei (protons) smash into each other to form helium. Fusion is not easy to achieve since the protons' like charges means that there is a huge electric repulsion between them when they are at the small distances (on the order of 1 fm) required to form a nucleus. To see why fusion only occurs at very high temperatures (like at the center of stars), consider this basic problem: Two protons are initially very far apart from each. What minimum speed must one of the protons be launched in order for it to overcome the electric repulsion and to end up within 1 fm of the other? (For simplicity, assume the other proton is being held in place.)
A beaker with a capacity of exactly 100mL contains 99.7mL of ethanol at 26degrees C. Part A If its temperature rises, at what temperature will it overflow
A microscope has an objective lens with a focal length of 2.0cm, an eyepiece with a focal length of 0.25 cm, What is the magnification of the microscope
An electric motor rotating a workshop grinding wheel at a rate of 98 rev/min is switched off. Find how long does it take for the grinding wheel to stop
Explain why should the Bryson Corporation act ethically in this situation? Illustrate what are the potentially negative representations of acting unethically?
An 8.61 kilogram block of ice at 0°C is sliding on a rough horizontal ice house floor (also at 0°C) at 15.4m/s, Determine the maximum amount of ice that will melt
A proton moves perpendicular to a uniform magnetic field. Its trajectory is a circle of radius 0.31 m with a period of 2.1 10-7 s. find the magnitude of centripetal force exerted on the proton
A hollow sphere of inner radius 6.2 cm and outer radius 7.2 cm floats half-submerged in a liquid of density 775 kg/m3. What is the mass of the sphere
a the star zog has a mass of 1.57 e30 kg. calculate the angle by which light from a distant star is deflected at a
,000-kg pile driver is used to drive a steel I-beam into the ground. calculate the average force the beam exerts on the pile driver while the pile driver is brought to rest
A spaceship travels at a constant speed from earth to a planet orbiting another star. When the spacecraft arrives, How far away is the planet according to observers on earth
An ac source of maximum voltage V0 = 30 V is connected to a resistor R = 50 O, an inductor L = 0.6 H, and a capacitor C = 20 µF. What is the maximum charge on the capacitor when the frequency of the source is set to the resonance frequency of the cir..
An object of mass 4.0 kg is allowed to fall from rest under the force of gravity for 3.4 s. What is the change in its momentum
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