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Steel rails 24.0 m long are laid end to end with gaps between them to account for thermal expansion.
Part A. If the track is laid when it's 15 oC, how large should the gaps be to allow temperatures up to 35 oC? Express your answer to two significant figures and include the appropriate units.
Part B. If the track is laid using the gaps you found in part (a), how large will the gaps be on a -21 oC winter morning? Express your answer to two significant figures and include the appropriate units.
A proposed ocean thermal-energy conversion (OTEC) system is a heat engine that would operate between warm water (26°C) at the ocean's surface, What is the maximum possible efficiency of the system
1. calculate the speed in ms at which earth revolves about the sun. you may assume the orbit is nearly circular.2. the
A scaffold of mass 43 kg and length 7.0 m is supported in a horizontal position by a vertical cable at each end. What is the tension in the cable closer to the painter
Determine the density of the proton.
the density of ice is 917 kgm3 and the density of sea water is 1025 kgm3. a swimming polar bear climbs onto a piece of
The coefficient of volume expansion of coffee is the same as that of water. How much coffee (in cubic meters) has spilled out of the beaker.
an electrically charged particle moves along a circle in a region of uniform magnetic field of magnitude B = 4.00mT. calculate the radius of the circle
Two charged spherical conductors are connected by a long conducting wire, and a charge of 15 μC is placed on the combina- tion. One sphere has a radius of 4.05cm and the other a radius of 6.05cm.
A 2600-pF air-gap capacitor is connected to a 9.0-V battery. If a piece of Pyrex glass (K=5) is placed between the plates
When she reaches the bus, explain how fast is the bus traveling? If the student's top speed is 2.20m/s^2 , will she catch the bus? What is the minimum speed the student must have to just catch up with the bus?
Consider a common mirage formed by super-heated air just above a roadway. A truck driver whose eyes are 2.00 m above the road, Find the index of refraction of the air just above the road surface
Suppose one night that the radius of the earth decreased by two (was half as big as normal), What would be the new value for the free fall acceleration
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