What is the energy level for calcium

When you look at green dots with a red filter what color did you see?

If R1 = 6 Ω, R2 = 8 Ω, R3 = 2 Ω, ε1 = 4 V, and ε2 = 14 V, what is the current in R2?

What is the displacement of an object that moves from the origin to a position at - 12 m?

Resistance is inversely proportional to cross sectional area; is it same as cross sectional area inversely proportional to resistance?

Technician A says that battery corrosion is commonly caused by spilled electrolyte. Technician B says that battery corrosion is commonly caused by electrolyte condensation from gassing. Who is correct?

When a Lunar Module landed on the Moon, it used thrusters to slow its descent to the surface. When other spacecraft are returned to Earth, they use parachutes to slow their descent. Why wouldn't a parachute be useful on the Moon?

Why are mercury and the earths moon so cratered?

Why is it inaccurate to use mgy to calculate the potential energy of a satellite orbiting earth at a height one earth radius above the earth's surface

State two any uses magnet in daily life

How does changing elevation affect air pressure?