The beam in a cathode ray tube is moved by an electric force. what did
scientists infer about atoms from this experimental result?
oa. electrons have more energy the farther they are from the nucleus.
ob. atoms are made up of smaller particles.
oc. atoms are small particles that cannot be destroyed or divided.
od. atoms have a dense, positively charged center.

Ais not a compound machine. a. bolt b. shovel c. handcart (dolly) d. see-saw (teeter totter)

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 does si stand for,when referring to a system of measurement