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LS23L Pre/Post Lab Quizzes
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Gravity
Spring 2021
Terms in this set (103)
According to the syllabus, how many writing assignments are there in LS23L?
3
What percentage of your grade is based on the final exam?
20%
True or False: According to the syllabus, you are required to buy a textbook for the remote LS23L lab course?
False
In lab this week we will be using which statistical test?
student's t-test
What does p-value stand for?
probability value
What is a hypothesis?
Testable explanation
Why do we need to have experimental controls?
Ensure that changes in the dependent variable depend on the independent variable
The Experimental Design lab module introduces you to compound X, a compound that may be harmful to kidney cells. Along with your experimental cells, you run a negative control. What would be your conclusion if most of the cells in the negative control died?
Your experimental setup is flawed
The Experimental Design lab module introduces you to compound X, a compound that may be harmful to kidney cells. What would the independent variable in your experiment be?
Compound concentration
The Experimental Design lab module introduces you to compound X, a compound that may be harmful to kidney cells. The number of dead cells is one of the variables in the experiment you perform. What type of variable is it?
Dependent variable
What part of the pipetter is indicated by the label "A" in the diagram below?
The pushbutton
The maximum volume for a pipetter can be found on the pushbutton.
true
How many millilters (ml) are in one liter (l)?
1000
Which of the following factors is mentioned as contributing to the spread of a disease?
All of these are factors:
Natural environment of a region
Cultural and social practices
Infrastructure present in a nation
Genetic background of a population
What do we call the individual who first spreads a virus?
Patient Zero
Verified questions
ENGINEERING
Does it make a difference for the enthalpy of combustion whether I burn with pure oxygen or air?What about the adiabatic flame temperature?
ENGINEERING
Coal is being discharged from a first conveyor belt at the rate of 150 kg/s. It is received at A by a second belt that discharges it again at B. Knowing that v1 = 3 m/s and v2 = 4.25 m/s and that the second belt assembly and the coal it supports have a total mass of 500 kg, determine the components of the reactions at C and D.
ENGINEERING
A closed, rigid tank is filled with water, initially at the critical point. The water is cooled until it attains a temperature of $400^{\circ} \mathrm{F}$. For the water, show the process on a sketch of the $T-v$ diagram and determine the heat transfer, in Btu per lb of water.
ENGINEERING
The following tridiagonal system must be solved as part of a larger algorithm (Crank-Nicolson) for solving partial differential equations: $$ \left[ \begin{array} { c c c } { 2.01475 } & { - 0.020875 } \\ { - 0.020875 } & { 2.01475 } \\ { } & { - 0.020875 } \\ { } \end{array} \right. \left. \begin{array} { c c c } { - 0.020875 } & { } & { } \\ { 2.01475 } & { - 0.020875 } \\ { - 0.020875 } & { 2.01475 } \end{array} \right] $$ $$ \times \left\{ \begin{array} { l } { T _ { 1 } } \\ { T _ { 2 } } \\ { T _ { 3 } } \\ { T _ { 4 } } \end{array} \right) = \left\{ \begin{array} { c } { 4.175 } \\ { 0 } \\ { 0 } \\ { 2.0875 } \end{array} \right) $$ Use the Thomas algorithm to obtain a solution
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