Solids that are good conductors of heat tend also to be good conductors of electricity

Indicate whether the statement is true or false


T

Physics & Space Science

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Two metal rods, one silver and the other copper, are both attached to a steam chamber as shown in the figure, with a temperature of 100°C, at one end, and an ice water bath, with a temperature of 0°C, at the other

The rods are 5.0 cm long and have a square cross-section, 2.0 cm on a side. When steady state has been reached, how much heat flows through the two rods in 1.0 min? The thermal conductivity of silver is 417 W/(m ? K), and that of copper is 395 W/(m ? K). No heat is exchanged between the rods and the surroundings, except at their ends. A) 20 kJ B) 39 kJ C) 47 kJ D) 49 kJ E) 11 kJ

Physics & Space Science

Two identical blocks are pulled as shown along rough horizontal surfaces with the same coefficient of friction. Both are pulled at constant speed v. Which tension force does more work moving the block a distance D along the surface?

Physics & Space Science

An electron travels under constant acceleration from a heated filament in an electron gun to the tip of the gun, where it is emitted. If the final speed of the electron is m/s, and the length of the gun from filament to tip is 1.25cm, what was the acceleration the electron underwent?

A.
B.
C.
D.
E.
F.

Physics & Space Science

A cereal box has the dimensions of 0.19 m × 0.28 m × 0.080 m. If there are 3.28 feet per meter, then what is the volume of the box in cubic feet?

a. 0.0043 cubic feet c. 0.046 cubic feet b. 0.15 cubic feet d. 0.0014 cubic feet

Physics & Space Science