Levi and Rachel performed an experiment in which they measured the heart rate of an average adult. On one day, Levi measured the resting heart rate of an adult. Then, the adult walked on a treadmill at a rate of four miles per hour. After thirty minutes, he measured the adult's heart rate again and recorded the data. Levi allowed the adult's heart rate to return to its original resting rate and then repeated his experiment two more times.

Two days later, Rachel performed the same experiment with the same adult. She, too, measured the resting heart rate and the heart rate after exercising. Their data appears below.

LEVI'S DATA RACHEL'S DATA

Resting Heart Rate = 62 bpm* Resting Heart Rate = 60 bpm*

Trial Heart Rate after Exercise

1 120 bpm

2 122 bpm

3 118 bpm

Trial Heart Rate after Exercise

1 118 bpm

2 119 bpm

3 120 bpm

* bpm = beats per minute

How do Levi and Rachel's results compare? pls help

Which type of bond is present in hydrogen sulfide (h2s)? the table of electronegativities is given. a. hydrogen b. ionic c. nonpolar covalent d. polar covalent

Problem #3 (ch. 1, problem 15)the ideal gas law provides one way to estimate the pressure exerted by a gas on a container. the law isí‘ťí‘ť=푛푛푛푛푛푛푉푉more accurate estimates can be made with the van der waals equationí‘ťí‘ť=푛푛푛푛푛푛푉푉â’푛푛푟푟â’푞푞푛푛2푉푉2where the term nb is a correction for the volume of the molecules and the term an2/v2is a correction for molecular attractions. the values of a and b depend on the type of gas. the gas constant is r, the absolutetemperature is t, the gas volume is v, and the number of moles of gas molecules is indicated by n. if n = 1 mol of an ideal gas were confined to a volume of v = 22.41 l at a temperature of 0â°c (273.2k), it would exert a pressure of 1 atm. in these units, r = 0.0826.for chlorine gas (cl2), a = 6.49 and b = 0.0562. compare the pressure estimates given by the ideal gas law and the van der waals equation for 1 mol of cl2 in 22.41 l at 273.2 k. what is the main cause of the difference in the two pressure estimates, the molecular volume or the molecular attractions?

What is the volume occupied by 10.0 dm3 of gas at standard pressure after it has been compressedat constant temputure to 500.0 kpa?