An element's atomic number is 48. How many electrons would an atom of this element have?

A 2 kilogram object falls a distance of 5 meters. How much potential energy does this object have before it falls? How much work is done on it by gravity as it falls

A physical reaction is a process in which one or more reactants change into one or more products with different properties. true or false

To rid the body of wastes, including excess water and salts" is the purpose of what human body system? A) Digestive B) Excretory C) Skeletal D) Nervous

A sample of carbon dioxide (C°p, m = 37.11 J K-1 mol-1) of mass 2.80 g at 27°C is allowed to expand reversibly and adiabatically from 500 cm3 to 2.10 dm3.

Comparing and contrasting ionic and covalent bonds?

Determine the mechanical energy of this object: a 1-kg ball sits on a 10-meter high cliff. A. The ball isn't moving, so the mechanical energy is zero B. 10 J C. 98 J D.

A proton that has a mass m and is moving at + 164 m/s undergoes a head-on elastic collision with a stationary carbon nucleus of mass 12m. the velocity of the proton after the collision is answer

what is the mass number in atomic mass units of an atom with 14 protons, 14 electrons, and 16 neutrons

How much work does an elephant do while moving a circus wagon 20 meters with a pulling force of 200n

Which is the best description of the acceleration of an object? an airplane changes elevation from 10,000 ft to 5,000 ft a cars velocity changes from 25 m/s to 20 m/s in 5 seconds a runner travels 100 m in one minute a remote-control car speeds up