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a carnot engine with a hot-reservoir temperature of 500 degrees c has a thermal efficiency of 263 what is the
a refrigerator requires 10 j of work and exhausts 70 j of heat per cycle what is the refrigerators coefficient of
from the difference in mass of a hydrogen atom appendix b to the mass of a proton and an electron table 15 estimate the
500 j of energy are transferred to a system in the form of heat while the thermal energy increases by 100 j how much
a copper block is removed from a 310 c oven and dropped into 110 kg of water at 205 c the water quickly reaches 259 c
70times103mol of gas undergoes the process shown in the figure what is the initial temperature what is the final
a cylinder contains 31 l of oxygen at 310 k and 25 atm the gas is heated causing a piston in the cylinder to move
using the liquid drop model tabulate the nuclear binding energy and the various contributions to the binding energy for
a demonstration gyroscope consists of a uniform disk with a 41-cm radius mounted at the midpoint of a light 58-cm axle
a flat slab of styrofoam with a density of 32 kgm3 floats on a lake what minimum volume must the slab have so that a
a rectangular trough 16 m long 060 m wide and 050 m deep is completely full of water one end of the trough has a small
driving home from school one day you spot a ball rolling out into the street you brake for 130 s slowing your 840 kg
a solution of hcl in water conducts an electric current but a solution of hcl in hexane does not explain this behavior
the sun transfers energy to the earth by radiation at a rate of approximately 100kw per square meter of surface if this
chlorine-36 is a b emitter with a half-life of 30 x 105 years there are 84 x 108 b particles emitted in 19min from a 60
between each pair of vertebrae in the spinal column is a cylindrical disc of cartilage typically this disc has a radius
an airplane undergoes the following displacements first it flies 71 km in a direction 30deg east of north next it flies
a predict the products of and balance the redox reaction of molten sodium and molten magnesium chlorideb predict the
a hollow cylindrical copper pipe is 140m long and has an outside diameter of 390cm and an inside diameter of 260cm how
1 a piece of charcoal used for cooking is found at the remains of an ancient campsite a 073 kg sample of carbon from
a technician plates a bowl with about 46 grams of chromium from an aqueous chromium iii sulfate what current is needed
a charged isolated metal sphere of diameter 13 cm has a potential of 9800 v relative to v 0 at infinity calculate the
calcium carbonate reacts with hydrochloric acid to make calcium chloride and water and carbon dioxide how many ml of
in the lab you place a beaker that is half full of water density rhow on a scale you now use a light string to
in an amusement park rocket ride cars are suspended from 425 m long cables attached to rotating arms at a distance of