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A basketball player does 2.43 x105 J of work through her time in the game, and evaporates 0.110 kg of water. Assuming a latent heat of 2.26x106 J/kg for the perspiration (the same as for water), decide (a) the change in the player's internal energy and (b) the number of nutritional calories the player has converted to work and heat.
When a 9.0 cm long pencil is arranged perpendicular to a convex mirror's optical axis at a distance of 22 cm from the mirror, How tall is the pencil's image if the pencil is moved to a distance of 50 cm from the mirror
questiona the proton-proton chain efficiently converts hydrogen into helium according to 4h rarr4 he. a helium 4
assume a bar 2.5 m long expands 0.5 cm when heated. By how much will a bar 100 m long of the same material expand when similarly heated.
a diffraction grating with 210 lines per mm is used in an experiment to study the visible spectrum of a gas discharge
An oscillating LC circuit has a current amplitude of 7.50 mA, a potential amplitude of 250 mV, and the capacitance of 220 nF. What are (a) the period of oscillation.
You are holding a bulletin board weighing 9.10 N in place against a wall while your friend secures it to the wall. How large must this force be if the coefficient of static friction with the wall is 0.39
The author gold wedding ring is stuck on his finger, and he must remove it. How much must the temperature of the ring be increased for it to slide past the knuckle
a copper alloy has a young's modulus of 1.3 *10^11 Pa and density of 9.40 * 10^3 Kg/m^3. what is the speed of sound in a thin rod made from alloy
Niobium metal becomes a superconductor when cooled below 9 K. determine the maximum current a 1.95-mm-diameter niobium wire can carry and remain superconducting
A proton and an electron are moving due east in a constant electricfield that also points due east. The electric field has a magnitudeof 3.0 x104 N/C. Determine the magnitude of the acceleration of the proton and the electron.
For one of the measurement you will be using a hanging mass of M=150 grams. Determine the expected frequency f2 of the second harmonic standing wave
a motor applies a constant tension of 2.5 kN to a cable passing over a pulley, find the work done by gravitaional force action on the crate
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