Colors seen on the cover of our paper-bound physical science text book result from color
A) addition.
B) subtraction.
C) either
D) neither
Answer: B
You might also like to view...
Hot water is used to heat air in a double pipe heat exchanger as shown in the following sketch. If the heat transfer coefficients on the water side and on the air side are 550 W/(m2K) and 55 W/(m2 K), respectively, calculate the overall heat transfer coefficient based on the outer diameter. The heat exchanger pipe is 5 cm, schedule 40 steel (k = 54 W/m K), with water inside but assume that a fouling factor of 0.173 (m2 K ) /kW based on the tube outside diameter has developed over time.
GIVEN • A double pipe heat exchanger with water in inner tube and air in the annulus • Heat transfer coefficients ? Water side h i= 550 W/(m2 K) ? Air side h o= 55 W/(m2 K) • Inner pipe: 2 in., schedule 40, made of steel • Pipe thermal conductivity (k) = 54 W/(m K) • Fouling factor (Rd) = 0.173 (m2 K )/kW= 1.73*10-4 (m2 K )/kW, based on the tube outside area FIND • The overall heat transfer coefficient based on the outer diameter (Uo) ASSUMPTIONS • Uniform heat transfer coefficients • The given fouling factor is based on the outer tube diameter (Do)
Start on the home screen of the interactive figure, with "Elevation is off." Then turn elevation on, and compare what you see. You may wish to switch back and forth between elevation on and off a few times. Then select the statements below that are true. Note: Features such as impact craters that are actually round in shape are distorted into oval shapes at mid- to high-latitudes by map projection effects.
A. The icy polar caps have the highest elevations of any features on Mars. B. There is a long, deep canyon that stretches along a region close to Mars's equator. C. Most of the northern hemisphere has much lower elevation than the southern hemisphere. D. The northern hemisphere is more heavily cratered than the southern hemisphere. E. There is a large, roundish region of low-elevation in the southern hemisphere. F. Several large volcanoes are found near or somewhat north of Mars's equator.
Determine the heat capacity (in calories/°C) of a lake containing one million gallons (approximately 4 million kilograms) of water at 15°C
a. 4 × 10^6 b. 4 × 10^9 c. 4 × 10^3 d. 1 × 10^3 e. 4 × 10^2
If the energy of n = 5 is –0.544 eV and that of n = 2 is –3.40 eV in a hydrogen atom, a transition from n = 2 to n = 5 will absorb a photon of what energy?