What is the importance of iron to the health of human being

If you moved to a planet that has the same mass as the earth but twice the diameter, how would your weight be affected?

Larry drops a 5kg ball off of a building. The ball hits the ground 4.7s later. How tall is the building?

Have you ever ridden a free-fall ride at an amusement park, where the riders are suspended at a terrifying height and then plummet towards the ground in free fall? These rides use a Lenz's law mechanism to slow the drop.

Does the gas have a well defined structure

A bike first accelerates from 0.0 m/s to 5.0 m/s in 4.5s, then continues at this constant speed for another 4.5 s. What is the total distance traveled by the bike?

What is the fate of the universe knowing that heat flow from hot to cold until there is equilibrium of temperature?

Limestone chips dissolve after they are placed in a beaker of dilute acid. Which geologic process is this most similar to?

In air an object weighs 15N. when immersed in water it weighs 12N. when immersed in another liquid it weighs 13N. determine the density of d object and that of d other liquid

You wash the dishes. when you let the water down the drain, where is the water flowing the fastest?

Are good conductors of heat also good conductors of electricity? Explain your answer.