If a platinum atom has 78 protons. How many electrons does it contain?

Will we ever have a theory of everything?

Calculate the period of a wave whose frequency is 5 Hertz and whose wavelength is one centimeter give your answer in a decimal form

How much pure gold (24/24) is to be added to 15.0 grams of 14 K gold (14/24) to obtain 18 K gold (18/24) ?

When heat is removed, how does a gas become a liquid? A. The particles in a liquid have less kinetic energy than the particles in gas B. The particles in a liquid have more kinetic energy than the particles in gas. C.

An ideal machine has an efficiency of 100%

A small 25 kilogram canoe is floating downriver at a speed of 4 m/s. What is the canoe's kinetic energy?

A car traveling on a flat (unbanked), circular track accelerates uniformly from rest with a tangential acceleration of 1.85 m/s2. The car makes it one quarter of the way around the circle before it skids off the track.

A train travels 120 km in 2 hours and 30 minutes what is the average speed

How many constellations are there?

What units are given to the right of the equals sign