A barium atom loses two electrons what charge does it have

What class of solids is made up of regularly repeating subunits of tightly packed, orderly arrangements of atoms, ions, or molecules?

What effect did the internal combustion engine have on transportation?

A car travels west for 240km in 4 hours. What is the car's velocity?

What is the mass of a 10.5 cm3 cube of fresh water (density 1.00 g/cm3) ?

Quantum theory, where may the electrons of an atom be found

Michael wanted to measure the temperature of an object. Which SI unit should he use? a. milliliter b. kilogram c. Fahrenheit d. Kelvin

Who descover gravity and when?

What is the magnitude of the angular acceleration of the salad spinner as it slows down?

What is the current in a 10v circuit if the resistance is 20Ohm?

A motorist is traveling at 20 m/s. He is 60 m from a stoplight when he sees it turn yellow. Is reaction time, before stepping on the brake, is 0.50 s. What steady acceleration (slowing down) while braking will bring him to a stop right at the light?