Which equation(s) are used to detect the presence of dark matter in galaxies? a) doppler shift equation b) kepler's 3rd law c) wien's law d) a and b

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.

Name the non metal condut electricity

An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. what other characteristic does the radiation have?