The national institute for occupational safety and health (niosh) sets standards for ccl4 in air at 12.6 mg/m^3 of air (a time average over 40 hr). the ccl4 found in a sample is 4800 ppb. does the sample meet the niosh standard?

Light waves travel than sound waves.

Find the mass, in grams, of 5.00*10^23 molecules of f2

Electromagnets coils of wire paper clips picked up 10 3 15 6 20 9 25 12 ms. owens' class was studying magnets. ms. owens showed her students how to make an electromagnet using a nail, a d-cell battery, and plastic coated wire. the students wrapped the wire around the nail and then attached the ends to the battery. when they were finished, they tested their magnets by investigating how many paperclips their magnets could pick up. they also tested whether they could increase the strength of their electromagnets by using more coils of wire. they recorded the class average of their results in the data table seen here. ms. owens asked her students to graph their data in a line graph. how should the students label the x-axis on their line graph? a) size of battery b) number of paper clips c) number of coils of wire d) strength of electromagnet