What theory held that the earth was the center of the universe and that the sun, moon, and planets revolved around it?

What is the second most abundant element in the universe?

Which material reflects the most light transparent, translucent, or opaque?

Elements in an blank or blank of the periodic table have similar characteristics

How does a vector quantity differ from a scalar? check all that apply. a. vectors have direction. b. vectors have units. c. vectors are bigger. d. vectors are faster.

What is the energy a wave carries measured by?

Thermal imaging cameras use what kind of electromagnetic energy

What was the original mission of the voyager space probes? A. to land on venus. B. to study comets and asteroids. C. to explore Jupiter and Saturn

If you weigh 660 n on the earth, what would be your weight on the surface of a neutron star that has the same mass as our sun and a diameter of 19.0 km? take the mass of the sun to be ms = 1.99*1030 kg, the gravitational constant to be g = 6.

A 4kg mass traveling eastwards at 4m. s per second collides with a 3kg mass traveling westward as 8m. s per second ... calculate the total momentum of mass before they colide

A 231-ω and a 206-ω resistor are connected in series across an unspecified power supply. if the current through the 231-ω resistor is 0.39 a, what is the exact current (in a. through the 206-ω resistor? do not include units with your answer.