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Two metal rods are to be used to conduct heat from a region at 100 C to a region at 0 C. The rods can be placed in parallel or in series. Is the heat conducted in the parallel arrangement (a) great than, (b) less than, or (c) the same as the heat conducted with the rods in series?
A small mailbag is released from a helicopter that is descending steadily at 2.13 m/s. How far is it below the helicopter
f the U.S. demand for electricity continues to grow at about 2% per year, how many more MWe would be needed to meet that demand in 10 years, What fraction of our present use of natural gas is this
A cylinder contains a piston on each side of which is one kilomole of an ideal gas. The walls of the cylinder are diathermal, compute the change in the Helmholtz potential
A double slit is opposite the center of a 1.6-m wide screen 2.4 m from the slits. How many fringes are visible on the screen if the slit is illuminated by 602-nm light
Copper wire has a breaking stress of about 3×10^8 N/m2. What is the highest load that can be hung from a copper wire of diameter 0.420 mm.
The space shuttle performs a retro burn for 3.5min to go from an orbital velocity of 17,500mph to re-entry velocity of 5000mph.
An amusement ride consists of a car moving in a vertical circle on the end of a rigid boom. The radius of the circle is 32 meters. What is the force of the boom on the car
The nucleus of an atom consists of protons and neutrons (no electrons). A nucleus of a carbon-12 isotope contains six protons and six neutrons.
A ball is thrown horizontally with a speed of 10.0m/s, from the edge of the top of a building of height 19.6m, What is the vertical component of the velocity just before the ball strikes the ground
A 1-cm-thick layer of water stands on a horizontal slab of glass. A light ray in the air is incident on the water 59 from the normal. After entering the glass, what is the ray's angle from the normal?
Three resistors, 21, 39, and 73 , are connected in series, determine the potential difference across the three resistors
A roller coaster car rolls down a frictionless track, reaching a speed V0(Velocity original) at the bottom. by what factor must you increase the height of the track
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