1. Why should a lungfish be able to meet nearly all its carbon dioxide exchange through the skin while it must use its lungs to handle oxygen exchange?
2. Give an example of (a) a peristaltic heart, (b) a chamber heart, (c) an open circulatory system, and (d) a closed circulatory system.
In: Nursing
In: Operations Management
Select all the statements that are true during the filling phase of the cardiac cycle.
Isovolumetric contraction
Ventricular Systole
Atria pressure is greater than ventricular pressure
Ventricular pressure is greater than aortic pressure
Ventricles are contracting
The AV valves are open
All valves are closed
Ventricular Diastole
Aortic Valve is open
In: Anatomy and Physiology
The S&P 500 stock price closed at $98, $103, $107, $102, $111 over five successive weeks. What is the weekly standard deviation of the stock price? What is the weekly standard deviation of the returns assuming no dividend were paid?
the right answer are $4.97, 5.71%
please show me the steps.
In: Finance
If hydrogen sulfide concentrations are greater than 0.15 mg S/L, it is harmful to fish health, calculate the minimum safe pH, if the total sulfide concentration is determined to be 20 micrometers. Assume this is a closed system and there is no H2S transfer with the atmosphere. pKa1= 7, pKa2= 12 for H2S. Molar mass for sulfur is 32g/mol
In: Chemistry
a glass tube both ends are open is dipped inside mercury so that one half is above the mercury level. then the one half of open end is closed and taken out there with a
10 cm long mercury left. if atmospheric pressure is 76cnHG calculate the length of the tube
answer is 16 cm pls explain the answer
In: Physics
32. What is empirical research ? 37. Which research positions require a college degree and which ones only require high school diploma ? 41. What’s the difference between open-ended versus closed-ended questions. Which type is the most difficult to tabulate? 42. Which are double-barreled questions?
In: Operations Management
consider the linear non-homogeneous recurrence relation of order three x(n)+x(n-1)-4x(n-2)-4x(n-3)=16
find the eigenvalues of the recurrence relation, the closed form solution, and based on the dominant Eigen value determine if x(n) has longterm exponential growth
In: Advanced Math
Consider a hypothetical closed economy in which households spend $0.60 of each additional dollar they earn and save the remaining $0.40.
The marginal propensity to consume (MPC) for this economy is , and the spending multiplier for this economy is .
Suppose the government in this economy decides to increase government purchases by $400 billion. The increase in government purchases will lead to an increase in income, generating an initial change in consumption equal to _________ . This increases income yet again, causing a second change in consumption equal to _______ . The total change in demand resulting from the initial change in government spending is _______.
In: Economics
A closed-end fund starts the year with a NAV of $12.55. By year-end, NAV equals $11.36. At the beginning of the year, the fund was selling at a 5% discount to NAV. By the end of the year, the fund is selling at a 1% premium to NAV. The fund paid year-end distributions of income and capital gains of $1.21. What is the rate of return to an investor in the fund during the year?
Round your answer to 4 decimal places. For example, if your answer is 3.205%, then please write down 0.0321.
In: Finance