Which of the following are examples of chemical energy being released or stored? (2 points)
|. Fireworks burning and exploding in the sky
||.The wind blowing a seed through the sky
|||.A guitar string making sounds
a
I only
b
I and II only
c
I and III only
d
I, II, and III
Answers: 2
Physics, 21.06.2019 20:00
The chemical effect of the endocrine system is longer lasting than the chemical effect of the nervous system. select the best answer from the choices provided t f
Answers: 3
Physics, 21.06.2019 20:10
Current 1 of 8.4 a runs for 240 seconds and then stops. current 2 is 10.5 a. how long does current 2 have to un to deliver the same amount of charge as current 1? 88.28 192 s 2016 s 21,000 s
Answers: 2
Physics, 21.06.2019 22:30
Under conditions for which the same room temperature is maintained by a heating or cooling system, it is not uncommon for a person to feel chilled in the winter but comfortable in the summer. provide a plausible explanation for this situation (with supporting calculations) by considering a room whose air temperature is maintained at 20â°c throughout the year, while the walls of the room are nominally at 27â°c and 14â°c in the summer and winter, respectively. the exposed surface of a person in the room may be assumed to be at a temperature of 32â°c throughout the year and to have an emissivity of 0.90. the coefficient associated with heat transfer by natural convection between the person and the room air is approximately 2 w/m2 â‹…â‹… k. what is the ratio of the thermal resistance due to convection to the thermal resistance due to radiation in the summer? what is the ratio of thermal resistances in the winter
Answers: 1
Physics, 22.06.2019 02:30
Explain the difference between each pair of concepts. a. frequency and relative frequency b. percentage and relative frequency a. select the correct choice below. a. frequency is the total number of observations in a data set. relative frequency is the number of times a particular distinct value occurs. b. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of a value to the total number of observations. c. frequency is the total number of observations in a data set. relative frequency is the ratio of the number of times a particular distinct value occurs to the frequency. d. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of two different values.
Answers: 3
Which of the following are examples of chemical energy being released or stored? (2 points)
|. Fire...
Spanish, 02.07.2019 05:30
Biology, 02.07.2019 05:30
Health, 02.07.2019 05:30
Mathematics, 02.07.2019 05:30
Physics, 02.07.2019 05:30
Spanish, 02.07.2019 05:30
History, 02.07.2019 05:30
Mathematics, 02.07.2019 05:30
Mathematics, 02.07.2019 05:30
English, 02.07.2019 05:30
English, 02.07.2019 05:30