A gas can containing a gallon of gasoline is stored in a basement. This gasoline contains
A) both work and energy.
B) neither work nor energy.
C) work.
D) both energy and power.
E) energy.
E
You might also like to view...
Why isn’t the crust of Venus broken into mobile plates as Earth’s crust is? How do you know?
a. Venus’s crust is much thicker and denser than Earth’s, so that probably prevents the crust from breaking. Moreover, there are no shield volcanoes on Venus. b. The mantle of Venus consists of great amounts of sulfur and fluorine, which makes mantle substances more solid and less plastic. So there are no traces of magma eruptions on Venus. c. Strong winds in the dense atmosphere of Venus sufficiently get rid of the interior heat, so there are no interior currents of matter to drive plate motion. Moreover, there are no shield volcanoes on Venus. d. Low-density, dryness, and pliability of Venus’s crust probably prevented it from breaking into rigid plates. On Venus there are no chains of composite volcanoes that form at plate boundaries.
Refer to Figure 6-11. Block A has a mass of 2.00 kg and rests on a rough table and is connected to block B, which has a mass of 3.00 kg, after passing over an ideal pulley, as shown. Block B is released from rest. The coefficient of kinetic friction between block A and the table is 0.300. What is the acceleration of the masses?
A. 6.54 m/s2 B. 3.92 m/s2 C. 4.71 m/s2 D. 0.981 m/s2 E. 5.89 m/s2
A shell-and-tube heat exchanger with two tube passes and a single shell pass is used to heat water by condensing steam in the shell. The flow rate of the water is 15 kg/s and it is heated from 60 to 80°C. The steam condenses at 140°C and the overall heat transfer coefficient of the heat exchanger is 820 W/(m2 K). If there are 45 tubes with an OD of 2.75 cm, calculate the length of tubes required.
GIVEN
• Shell-and-tube heat exchanger with two tube passes and one shell pass
• Water in tubes, condensing steam in shell
• Water flow rate m w= 15 kg/s
• Water temperatures
? Tw,in = 60°C
? Tw,out = 80°C
• Steam temperature (Ts) = 140°C
• Overall heat transfer coefficient (U) = 820 W/(m2 K)
• Number of tubes (N) = 45
• Tube outside diameter (D) = 2.75 cm = 0.0275 m
FIND
• The length of tubes (L)
ASSUMPTIONS
• Counterflow
SKETCH
PROPERTIES AND CONSTANTS
the specific heat of water at the mean temperature of 70°C (cpw)= 4188 J/(kg K)
How many unique quantum states correspond to the lowest possible energy level of an electron in the hydrogen atom?
A) 3 B) 0 C) 1 D) 4 E) 2