The resistance of a platinum wire is to be calibrated for low-temperature work. A platinum wire with resistance 2.000 W at 20C is immersed in liquid nitrogen at 77 K (-196C). If the temperature response of the platinum wire is linear, what is the expected resistance of the platinum wire at -196C? aplatinum = 3.92 10-3 (C)-1.
a. 0.153 W
c. 3.69 W
b. 1.768 W
d. 0.307 W
Question 2
How deep under the surface of a lake would the pressure be triple that at the surface? (1 atm = 1.01 105 Pa)
a. 1.00 m
c. 10.3 m
b. 9.80 m
d. 20.6 m
A Biologist at Work
Calibrated cups, spoons, droppers, and syringes are often used to administer liquid medications.
Work and Gender: Women at Work in India
The homeostatic control of normal body temperature (37°C or 98.6°F).
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Observed global land and ocean surface temperature anomalies since 1850