The fundamental unit of the silicon-oxygen minerals is in the shape of a
a. cone.
b. tetrahedron.
c. cube.
d. sphere.
b
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What is the sum of 1.53 + 2.786 + 3.3 expressed to the correct number of significant figures?
A) 7 B) 7.6 C) 7.62 D) 7.616 E) 7.6160
What is the value for the total energy that reaches each square meter of Earth from the Sun each second called?
a. Solar constant b. Solar maximum c. Sunspots d. Solar wind
Estimate the depth in moist soil at which the annual temperature variation will be 10% of that at the surface.
GIVEN
Moist soil
FIND
The depth in moist soil at which the annual temperature variation will be 10 per cent of that at the surface
ASSUMPTIONS
Conduction is one dimensional
The soil has uniform and constant properties
Annual temperature variation can be treated as a step change in surface temperature with a 6 month
response time
SKETCH
The volume coefficient of thermal expansion for gasoline is 950 × 10-6 K-1. By how many cubic centimeters does the volume of 1.00 L of gasoline change when the temperature rises from 30°C to 50°C?
A) 6.0 cm3 B) 12 cm3 C) 19 cm3 D) 37 cm3