Democritus thought that matter was made of tiny particles. true or false

Microwaves are electromagnetic waves used in broadcasting and telecommunications. when do these waves increase in frequency?

If there's nothing faster then light then how did the dark get there first and if the dark was always there then how was light created?!!

Verena is mixing a material into a beaker filled with a liquid. She notices that the material seems to disappear into the liquid. What physical property of the material is Serena most likely observing

Which is an example of potential energy? a a car driving on the road b a swimmer kicking their legs c a yo-yo in someone's hand d an arrow flying at a target

What do all group 2 elements have in common? They all gain two electrons to form a stable outer energy level. They form covalent bonds with halogens. They all react easily with the noble gases. They tend to form ionic bonds by losing electrons

Show your conversions on the right 8500 mm 2. 250 mg 3. 500000 g 4. 201 = 5. 0.5 Km 6. 350 mm

As one goes from left to right in a period, which of the following is true? A. The number of protons decreases. B. The number of valence electrons increases. C. both A and B D. none of the above

Which phrases describe organisms that formed index fossils

What will happen to plant height if the amount of available light is reduced due to global dimming? Which type of investigation would most likely be conducted to answer the following question?

A machine has an efficiency of 80%. How much work must be done on the machine so to make it do 50,000 J of output work?