Master Physics with Fun Quizzes & Brain Teasers!

true/false. a bonding operation utilizes a laser to provide a constant heat flux
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An iron wire has a cross-sectional area equal to 5.0010 6 m2. Carry out the following steps to determine the drift speed of the conduction electrons in the wire if it carries a current of 30.0A. (a) How many kilo-grams are there in 1.00mole of iron? (b) Starting with the density of iron and the result of part (a), compute the molar density of iron (the number of moles of iron per cubic meter). (c) Calculate the number density of iron atoms using Avogadros number. (d) Obtain the number density of conduction electrons given that there are two conduction electrons per iron atom.(e) Calculate the drift speed of conduction electrons in this wire.
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which wave diagram has both wavelength () and amplitude (a) labeled correctly?
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two converging lenses of focal lengths 100 cm and 10 cm are combined to form an astronomical telescope. its magnification is
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two small nonconducting spheres have a total charge of q=q1 q2=q=q1 q2= 95.0 cc , q1
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The lower_bound() method of C++ returns the index of the first element in the array which has a value not less than the key.
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two uncharged metal spheres, spaced 10.0 cmcm apart, have a capacitance of 28.0 pfpf . part a how much work would it take to move 16.0 ncnc of charge from one sphere to the other?
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A sprinter completes a 100-m dash in 10.6 s, doing 22.4 kJ of work. What is her average power output?
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use v for elevation in feet and h for horizontal distance in miles, and find a formula that gives your elevation as a linear function of your horizontal distance from the base of the hill.
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4) A charge -300e is uniformly distributed along a circular arc of radius 4.00cm, which subtends an angle of 40 degree. What is the linear charge density along the arc? (b) A charge -300e is uniformly distributed over one face of a circular disk of radius 2.00cm. What is the surface charge density over that face?
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At what position does the mass have the greatest acceleration?(a.)-A(6.)-42A[(c.) 0(d.)+12A(e.)+A
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An ice cube of mass 50.0g can slide without friction up and down a 25.0degree slope. The ice cube is pressed against a spring at the bottom of the slope, compressing the spring 0.100m . The spring constant is 25.0N/m . When the ice cube is released, how far will it travel up the slope before reversing direction?Part BYou should compile two lists: one of known quantities and one listing the variable(s) that are unknown. Identify the following variables as either known or unknown:m, the mass of the ice cube,k, the spring constant,x, the distance the spring compresses,h, the maximum height (measured vertically from the base of the slope) that the ice cube reaches,d, the maximum distance along the slope that the ice cube travels, and?, the slope's angle of incline measured from the horizontal.
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in a competitive industry with identical firms, long-run equilibrium is characterized by: p > min atc p < avs
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in the figure above, a movement from point b to point c as a result of a decrease in the price of potato chips represents the
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Calculate the binding energy, and the binding energy per nucleon, for a nucleus of the 16O isotope. Express your answers in units of megaelectronvolts (MeV).
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What is the Sun's approximate composition (by mass)?A. 50% hydrogen, 25% helium, 25% other elementsB. 70% hydrogen, 28% helium, 2% other elementsC. 90% dark matter, 10% ordinary matterD. 100% hydrogen and helium
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Calculate the Schwarzschild radius for a black hole that has a mass equal to that of 50 Suns. A. 4.42x10 m B. 7.37x10 m C. 1.47x10 m D.3.0x10 m
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Wood is a biofuel. Suggest why wood has been used constantly for many years whereas other fuels have only been used much more recently. :)
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A 0.142 kg baseball leaves a pitcher's hand at a speed of 30.5 m/s .If air drag is negligible, how much work has the pitcher done on the ball by throwing it?
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what are the phases present in a 1040 steel at 500 oc ?
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what is the temperature of a gas of coz molecules whose rms speed is 329 m/s?
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a circular, parallel plate capacitor in a dc rc circuit is charging. what is the direction of the poynting vector between the capacitor plates?
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suppose you climb the stairs of a ten-story building, about 30 m high, and your mass is 60 kg. the gravitational potential energy you gain is about
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a 4 kg block, initially moving due east at 3 m/s, is acted upon by an impulse having magnitude 8 ns and direction due west. the final velocity of the block is
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