Which variable stars have pulsation periods between 1.5 hours and 1.2 days?
a. cepheid variables
b. protostars
c. rr lyrae variables
d. nebulas

Which statements about tornadoes are true? check all that apply. (a) about 12,000 tornadoes hit the united states every year. (b) a tornado looks like a funnel. (c) tornadoes are deadly atmospheric storms that cause millions in damages each year. (d) tornadoes can reach wind speeds of more than 300 miles per hour. (e) kansas is the state with the most tornadoes. (f) you will always notice a funnel before a tornado strikes.

What are the applications of electromagnetic waves

Which lists the pairs of plates in order from least to greatest in terms of the work done to move the electron?