Four people are needed to lift a TV set with a single fixed pulley. How many people will be needed to lift the same TV set with a 2 fixed, 2 moveable pulley system? (Ignore friction.)

What is thr driving force of convection in the atmosphere and ocean?

Qualitative measurements involve numerical measurements while quantitative measurements record descriptions. Question 5 options: True False

Why are food preservatives added to food? how does it effect the reaction?

What is the energy of a battery?

Which of the following isotopes has the same number of neutrons as carbon-14? (atomic number 6) * O-15 (atomic # is 8) N-14 (atomic # is 7) O-16 (atomic # if 8) < this is the correct answer F-19 (atomic # is 9)

How does Q compare to Keg? O Q> Keq O Q< Kea OQ = Keg

What is the mass (in grams) of 9.09x10^24 molecules of methanol (CH3OH) ? AND How many moles of N are in 0.183g of N2O?

What are the basic building blocks of matter? A) molecules B) atoms C) electrons D) compounds

How does an atom with too few neutrons relative to protons undergo radioactive decay? * by converting proton to a neutron by converting a neutron to a proton by emitting an alpha particle

What is the chemical formula for the compound formed between sodium and iodine?