A certain material is in a room at 25°C. If the absolute temperature (K) of the material is tripled, its resistance doubles. (Water freezes at 273 K.) What is the value for ?, the temperature coefficient of resistivity?
a. 0.020 (°C)?1
b. 0.0034 (°C)?1
c. 0.0017 (°C)?1
d. 5.96 (°C)?1
c
Physics & Space Science
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Matthew pulls his little sister Sarah in a sled on an icy surface (assume no friction), with a force of 60.0 Newtons at an angle of 37.0° upward from the horizontal. If he pulls her a distance of 12.0 m, the work he does is
A) 0.333 kJ B) 720 J C) 575 J D) 433 J E) 185 J
Physics & Space Science
Larger batteries have higher output voltages
Indicate whether the statement is true or false
Physics & Space Science
Two nuclei which share the same atomic number Z always are
a. stable. b. unstable. c. isotopes. d. isobars. e. radioactive.
Physics & Space Science
Explain why it is so difficult to see planets around other stars
What will be an ideal response?
Physics & Space Science