What is the force that acts in an upward direction, against the force of gravity, so it makes an object feel lighter?

Under normal temperature and pressure conditions, what type of rock could be formed from weathering in erosion of metamorphic rock

Argon is adiabatically compressed from an initial volume of 16 liters to a final volume of 2 liters. by what factor do the following quantities change? do they increase or decrease? (a) the rms speed (b) the thermal energy of the gas (c) the molar specific heat cv (d) the pressure

If an atom contains 11 protons in its nucleus, predict the element with the atomic number and electronic configuration. will the number of electrons remain the same during the chemical reaction in such an atom? explain.