What element has 81 protons in the nuclei of atoms

What happens to light waves from a star as the star moves away from Earth?

What homemade things could I use for wheels on a small balloon powered car?

Type of energy transformed into chemical energy by plants is called type of energy transformed into chemical energy by plants is called @Physics

Velocity is a vector quantity, and speed is a scalar quantity. The speed

Is it possible to access the multiverse? This makes me seem like a fanatic I know but I am truly curious.

Life cycle of a medium mass star

Use the periodic table to complete this equation that represents the process of nuclear fusion. Superscript 14 Subscript 7 Baseline N + Superscript 1 Subscript 1 Baseline H yields Superscript A Subscript B Baseline C

Josh rolled a bowling ball down a lane in 2.5 seconds. The ball travelled at a constant acceleration of 1.8 m/s/s down the lane and was traveling at a speed of 7.6 m/s by the time it reached the pins at the end of the lane.

How many meters of the rock wall eroded between 1910 and 1927?

As air temperatures increase, evaporation increases. Warmer temperatures also increase the capacity to absorb water vapor. More water vapor in the atmosphere accelerates the greenhouse effect.