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1. What are the lowest temperatures at which electrons or muons can be created from thermal interactions? These are the approximate lowest temperatures at which these particles would have "frozen" out of thermal equilibrium proportions.
2. If the mass of the electron neutrino is 2.2 eV/c 2, what is the lowest temperature at which it could be formed from thermal interactions? What if its mass is 10-4 eV?
When cylinder-head bolts in an automobile engine are tightened, the critical quantity is the torque applied to the bolts. Why is the torque more significant than the actual force applied to the wrench handle?
A sine wave is traveling along a string. The time for a particular point to move from maximum displacement to zero is 0.880 s. What is the period?
A series RLC ac circuit is at resonance. It contains a resistor of 30 Ohms, a capacitor of 0.35 microFarads and an inductor of 90 mH. If an effective (rms) voltage of 150 V is applied, what is the peak current?
A light ray is propagating in a crystal where its wavelengthis 531 nm. It strikes theinterior surface of the crystal with an incidence angleof 30°, Find the light's frequency
A 100-W lightbulb has a resistance of about 12Ω when cold (12 C) and 140Ω when on (hot). Estimate the temperature of the filament when hot assuming an average temperature when hot assuming an average temperature coefficient of resistivity a =0.0060 ..
why if the potential is constant on a surface,then any electric field present can only beperpendicular to that surface?... can you please explain howthis is true in more detail.
A shopper pushes a cart 50 m south down one aisle and then turns 90° west and moves 28 m. He then makes another 90° turn and moves 11 m.
The density of bubble gum is about 970 kg/m3 . You blow a 7.00-gram wad of gum into a bubble with a measured diameter of 9.50 cm. What is the thickness of the bubble
a 1000 kg safe is held 2 m above a heavy duty spring when the rope holding it breaks. the safe compresses the spring 50
A 200-turn circular loop of radius 55 cm is vertical, with its axis on a line running east to west. What is the magnitude of the torque on the loop
Light of wavelength 380 nm is incident on the face of a silica prism at an angle of 1 = 64.2 (with respect to the normal to the surface). The apex angle of the prism is = 63.1. Given: The value of the index of refraction for silica is n = 1.455.
When responding to sound, the human eardrum vibrates about its equilibrium position. Estimate what is the maximum acceleration of the eardrum
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