Author: Anonymous

You sit in between two speakers located 35 feet apart which are emitting the same sound in phase. You observe that when you are 10 feet from the left speaker and 25 feet from the right speaker, the sound you hear is at a minimum intensity. Which of the following could NOT be the wavelength

A fluid is placed in a U-shaped tube as shown. Air is pumped out of the left-hand side of the tube and it is plugged with a stopper. The right-hand side is open to the atmosphere. Which of the following is a correct ranking of the pressure at points A, B, C, and D?  

Three objects (m1, m2, and m3) are submerged completely in three unknown fluids (

Water is flowing through the pipe shown below from points 1 to 4. The area of the pipe at point 1 is A1.  The area of the pipe at point 2 is A2.  The area of the pipe at point 3 is A3.  And the area of the pipe at point 4 is A4.  While evaluating the statements below, take A1 = A2 < A3 = A4.  Ignore viscosity and assume that the water fills the pipe completely at all locations. What happens to the pressure from point 1 to point 2? [pressure] In which of the following cases can we not conclude anything definite about the change in pressure? [notsure]  

A marine engineer is testing a design for the hull of a boat. In order to minimize turbulent drag, she would like to conduct a test in which the flow of fluid around the hull is laminar. From the following table of fluids, which fluid should she choose for the test in order to most likely ensure laminar flow? The boat will move at the same speed in each of the possible fluids.

How much total heat Q must be removed from 1 kg of liquid water at 20°C in order to freeze it?  cw = 4186 J/kg ºC  Lf = 333 kJ/kg

If the pressure in an ideal gas drops to 1/4 the original, what must happen to the volume for the temperature to be the same?

Assign oxidation numbers to the atoms found in  CO2

Do you acknowledge that you have reviewed the required materials for this course (as outlined in the syllabus addendum) and understand that if you do not have the proper software/hardware to participate in this class, you will need to install it/acquire it/make use of the Open Student Lab?

What happened to the H atom in the reaction shown below: Zn (s) + 2HCl (aq) → ZnCl2(aq) + H2(g){“version”:”1.1″,”math”:”Zn (s) + 2HCl (aq) → ZnCl2(aq) + H2(g)”}