Numerade

Questions asked

BEST MATCH

Parathyroid hormone regulates which electrolyte? Sodium Potassium Calcium Magnesium Parathyroid hormone regulates which electrolyte? Sodium Potassium Calcium Magnesium

View Answer

BEST MATCH

Problem 7. The height of an object in motion is given by $h(x) = \sqrt{1 + 2x}$ meters, where \\ $x$ is the number of seconds after it starts moving.\ (1) On average, how rapidly is the height of the object changing between $x = 1$ second \\ and $x = 1.1$ second?\\ Hint: This question is asking for the average velocity of the object.\ (2) How rapidly is the height changing at $x = 1$ second?\\ (3) Write the equation for the tangent line to the graph of $h(x)$ at $x = 1$.

View Answer

BEST MATCH

Which of the following is NOT correct when describing moment of inertia? calculated as a constant times "mR2" distribution of mass resistance to rotational motion (spin) shape of object doesn't matter

View Answer

BEST MATCH

Andre is a family therapist who is interested in how husbands cope when they are the victims of physical abuse suffered at the hands of their wives. He makes an intensive study of the five husbands who are currently his clients for therapy sessions because they suffer physical abuse from this source. Andre is using which type of research method? a. Clinician's cross-sectional study b. Experiment c. Clinician's case study d. Cross-sectional study

View Answer

BEST MATCH

I have a dynamic calendar. I want to highlight the weekend on the calendar. My weekends are Friday and Saturday. How can I do it without using VBA?

View Answer

BEST MATCH

Project 2 Brayton cycle with air as the working fluid that delivers 100 MW of net power output. The minimum and maximum temperatures in the cycle are 300 and 900 K, and the pressure of air at the compressor exit is 9 times the pressure at the compressor inlet. The compressor has an isentropic efficiency of 80% and 90% percent for the turbine. 1. Investigate the principles of operation for a gas turbine power plant. 2. Construct T-S diagram with respect to saturation lines showing all the states and processes. 3. Explain why Brayton cycle is more preferred over Rankin cycle in power plant stations? 4. Discuss how would minimize the back work ratio in Brayton cycle. 5. Assume variation of specific heats with temperature, calculate the back work ratio and thermal efficiency for the cycle. 6. Assume constant specific heats, calculate the back work ratio and thermal efficiency for the cycle. 7. Critically analyse the practical solutions manufacturers offer to overcome problematic areas in gas turbines, such as burner ignition continuation and self-starting capabilities.

View Answer

BEST MATCH

Select the container that will have the highest internal gas pressure under the set of conditions (amount, volume and temperature) that are shown in each. Container 1 1 mol H$_2$ 2 Litre 25 $^\circ$C Container 2 1 mol H$_2$ 1 mol O$_2$ 1 Litre 25 $^\circ$C Container 3 1 mol H$_2$ 1 Litre 0 $^\circ$C Container 4 1 mol H$_2$ 1 Litre 25 $^\circ$C Container 5 2 mol H$_2$ 0.5 Litre 25 $^\circ$C a. Container 1 b. Container 2 c. Container 3 d. Container 4 e. Container 5

View Answer

BEST MATCH

4. The pH of rain, measured at a weather station in Michigan, was observed for 39 consecutive rain storms (rain_pH.csv). The sample mean is 4.6982 and the sample variance is 0.39623. a) Obtain a 99% confidence interval for the mean pH of the population of storms at that location. b) Interpret the term \"confidence\". What probability does it represent and what does it mean for the integrity of the conclusion (and the investigator)?

View Answer

BEST MATCH

3. How large are the numbers of statistical mechanics? Some of the numbers we use in stat mech will defeat your calculator! A googol is $10^{100}$, whilst a googolplex is $10^{googol}$. Consider the monatomic ideal gas with one mole of particles, room temperature $T = 300$ K, and a volume $V = 22.4$ L (this corresponds to atmospheric pressure). (a) Which of these properties ($S, T, U, \Omega(U)$) are greater than a googol or googolplex, assuming you are using `molecular-level' units (like $k_B$ for $S$, and $k_BT$ for $U$) (b) Which of these are intensive, extensive, or `faster than extensive' (i.e., grows greater-than- linearly with respect to $N$)

View Answer

BEST MATCH

Estimate the time required to hard-cook an egg if: • The minor diameter is 45 mm. • k for the entire egg is about the same as for egg white. No significant heat release or change of properties occurs during cooking. • $\bar{h}$ between the egg and the water is 1000 W/m$^2$K. • The egg has a uniform temperature of 20°C when it is put into simmering water at 85°C. • The egg is done when the center reaches 75°C.

View Answer

francisco r.