Numerade

Questions asked

BEST MATCH

Energ How do we access chemical energy? How do we access chemical energy? Energy

BEST MATCH

PPSV: This vaccine protects against what disease? Question 35 options: Human papillomavirus Pneumococcal disease Hepatitis A Hepatitis B

View Answer

BEST MATCH

3.3 Suppose the coldest reservoir we have at hand is at 10°C. If we want a heat engine that is at least 90% efficient, what is the minimum temperature of the required hot reservoir?

View Answer

BEST MATCH

DESCRIPTION: For this assignment, you need to create a threaded program ("assignment2_summation.cpp"). It performs a summation operation of randomly generated n integer numbers with multi-threads. When running the program, you need to measure execution times. For this, you must place the header file ("hpc_helpers.hpp") in the same directory where your source code is located. With the header file, you can measure computation time easily. Task 1. Create a multi-threaded program. Task 2. Run the program with different input numbers - 1000, 10000, and 100000 in three scenarios to measure execution times; Scenario 1. No threaded summation Scenario 2. 10 multi-threaded threaded summation Scenario 3. 100 multi-threaded summation

View Answer

BEST MATCH

Under current guidelines, would this swimmer athlete be allowed to compete in women's events? Yes, because testosterone levels are low. No, because of the absence of a Barr body.

View Answer

BEST MATCH

The bank rate is the rate of interest that Select one: ? the Bank of Canada charges members of Canadian Payments Association for very short-term loans. ? the Bank of Canada charges the Ministry of Finance for selling Canadian government securities. ? banks charge businesses that borrow a minimum amount of capital. ? banks charge other banks for short-term loans.

View Answer

BEST MATCH

Which of these is NOT an identified theory of language learning? Infants are able to learn language once they develop explicit memory. Infants understand language because of brain maturation. Social impulses and interaction initiate infant communication. Infants are directly taught language.

View Answer

BEST MATCH

Name: Date: The Properties of Buffers: Resisting Change in a Turbulent World Lab Instructor: Lab Section: RESULTS and POST-LABORATORY QUESTIONS Part A. Properties of a Buffer Which set of data is yours? Buffer 1 Buffer 2 or Buffer 3 Buffer 1 [base] [acid] ratio 1:1 Average pH of buffer 9.555 DI-H?O Average pH of 8.06 buffer after 9.44 adding HCI pH of buffer after 9.92 adding NaOH pH of DI-H?O after 2.78 adding HCl pH of DI-H?O after 12.20 adding NaOH QUESTIONS FROM PART A 1. Verify that the volumes of acid and base you were asked to use will result in the correct total concentration of the buffer. 2. Calculate the $\frac{[base]}{[acid]}$ ratio used for your buffer. $\frac{[0.027]}{[0.02]} = 1$ 3. Closely examine the data from Part A. Looking at all three buffer solutions, do you see a relationship between the $pK_a$ value of the acid, the desired or target pH of the buffer, and the $\frac{[base]}{[acid]}$ ratio? Explain. For buffer 1 I believe there is a direct relationship between the $pK_a$ value of the acid, the desired pH, and the $\frac{[base]}{[acid]}$ ratio.

View Answer

BEST MATCH

Frank's automobile engine runs at 100°C. One day, when the outside temperature is 14°C, he turns off the ignition and notes that 5 minutes later, the engine has cooled to 80°C. When will the engine cool to 40°C? (Give your answer to the nearest whole number.) t? minutes

View Answer

BEST MATCH

According to the U.S. Census Bureau, the mean of the commute time to work for a resident of Portland, Maine is 24.8 minutes. Assume that the standard deviation of the commute time is 4.5 minutes to complete parts (a) through (c). (a) What minimum percentage of commuters in Portland has a commute time within 2 standard deviations of the mean? % (Round to one decimal place as needed.) (b) What minimum percentage of commuters in Portland has a commute time within 1.5 standard deviations of the mean? What are the commute times within 1.5 standard deviations of the mean? The minimum percentage of commuters in Portland that has a commute time within 1.5 standard deviations of the mean is %. (Round to one decimal place as needed.) The commute times within 1.5 standard deviations of the mean are between and minutes. (Type integers or decimals. Do not round. Use ascending order.) (c) What is the minimum percentage of commuters who have commute times between 11.3 minutes and 38.3 minutes? % (Round to one decimal place as needed.)

View Answer

sean j.