The metamorphic property of flat or elongated mineral grains in parallel layers is called

A) schist.
B) cleavage.
C) foliation.
D) lithification.


Answer: C

Physics & Space Science

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Power: A resistance heater is rated at 1200 W when operating at 110 V dc. What current will it draw?

A. 0.090 A B. 1.0 A C. 11 A D. 12 A

Physics & Space Science

The 1-m-long, tube-within-a-tube heat exchanger, as shown in the sketch, is used to condense steam at 2 atmospheres in the annulus. Water flows in the inner tube, entering at 90°C. The inner tube is made of copper with a 1.27 cm OD and 1.0 cm ID. (a) Estimate the water flow rate required to keep its outlet temperature below 100°C. (b) Estimate the pressure drop and the pumping power for the water in the heat exchanger, neglecting inlet and outlet losses.

GIVEN
? Tube-within-a-tube condenser
? Cooling water flowing in the inner tube
? Steam at 2 atm condensing inside the annulus
FIND
(a) Coolant water flow rate to maintain coolant outlet temperature below 100°C
(b) Coolant pressure drop and pumping power
ASSUMPTIONS
? Steady conditions
? The heat exchanger is horizontal
SKETCH

PROPERTIES AND CONSTANTS
From Appendix 2, Table 13, the properties of water at 2 atm are

Physics & Space Science

Consider two spaceships, each traveling at 0.500c in a straight line. Ship A is moving directly away from the sun and ship B is approaching the sun. The science officers on each ship measure the velocity of light coming from the sun

What do they measure for this velocity? A) Ship A measures it as less than c, and ship B measures it as greater than c. B) Ship B measures it as less than c, and ship A measures it as greater than c. C) On both ships it is measured to be less than c. D) On both ships it is measured to be exactly c. E) On both ships it is measured to be greater than c.

Physics & Space Science

A 0.16 pF parallel-plate capacitor is charged to 10 V. Then the battery is disconnected from the capacitor. When 1.00 × 10^7 positive charges of magnitude |e| are now placed on the positive plate of the capacitor, the voltage between the plates changes by

a. -5.0 V. b. -1.1 V. c. 0 V. d. +1.1 V. e. +5.0 V.

Physics & Space Science