Zachary, a lab instructor, is writing a safety contract that his chemistry class will use for an experiment. he mentions that students should not eat or drink in the lab.
which other item should also be included?
a. do not wear hats in the lab.
b. do not bring backpacks to the lab.
c. do not open any windows in the lab.
d. do not chew gum in the lab.

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.

If you let go of the notebook after lifting it, will it move? how?

What is the specific heat of wood ?