The human body is 65% oxygen by mass. If a person has a mass of 75.0 kg, what is the mass oxygen in his body?

What is an alpha particle? A particle that has the same mass as an electron but the opposite charge. A very fast, high-energy electron. A helium nucleus without its electron cloud.

How long does it take our solar system to orbit the milky way galaxy?

What is the charge on a hypothetical ion with 35 protons and 33 electrons?

Why does a fluid become less dense when it is heated?

Select all of the answers that apply. Relative dating uses laws or principles of stratigraphy and paleontology.

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

Vector has a magnitude of 5.2 units and is directed east. vector has a magnitude of 4.3 units and is directed 35° west of north. by constructing vector diagrams, find the magnitudes and directions of (a) and (b) 4. (a)

Which of the following has the greatest momentum? A - Truck with a mass of 2250 kg moving at a velocity of 25m/s B - car with a mass of 121010 kg moving at a velocity of 51 m/s C - truck with a mass of six 6120 kg moving at a velocity of 10 m/s