Calculate the kinetic energy of an 80,000 kg airplane that is flying with a velocity of 167 m/s.

On a day when the barometer reads 75.23 cm, a reaction vessel holds 250 ml of ideal gas at 20 celsius. an oil manometer ( ρ= 810 kg/m^3) reads the pressure in the vessel to be 41 cm of oil and below atmospheric pressure. what volume will the gas occupy under s.t.p.?

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

Which component of the earth’s atmosphere is decreased due to photosynthesis?