What makes up the dark colors of the lunar lowlands?
a. sedimentary rock
b. anorthosite
c. andesite
d. basalt
e. iron
d
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On a winter day the temperature is 5 degrees Celsius and the humidity is 0.003 kilograms per cubic meter. (a) What is the relative humidity? (b) The air is brought into a building and heated to 20 degrees Celsius without changing the humidity. What is the relative humidity inside the building?
A resistance of 55. ?, a capacitor of capacitive reactance 30. ?, and an inductor of inductive reactance 30. ? are connected in series to a 110. V, 60. Hz power source. What current flows in this circuit?
A) 2. A B) less than 2. A C) more than 2. A but less than 4. A D) more than 4. A E) 4. A
You are building a compound microscope with an objective lens of focal length 0.60 cm and an eyepiece lens of focal length 5.0 cm. You mount the lenses 18 cm apart. What is the maximum magnification of your microscope?
a. 5 b. 10 c. 75 d. 150 e. 18
It is generally easier to push an object once it is moving than when you are getting it started. This is because
a. sliding friction is zero. b. sliding friction is less than static friction. c. static friction is less than sliding friction. d. static friction is zero.