When aluminum foil is formed into a loose ball, it can float on water. But when the ball of foil is pounded flat with a hammer, the foil sinks. why?

5. which event marks the end of both the Paleozoic era and the mesozoic era? A. cenozoic B. mesozoic C. paleozoic D. precambrian

A car, moving along a straight stretch of highway, begins to accelerate at 0.0323 m/s 2. It takes the car 63.3 s to cover 1 km. How fast was the car going when it first began to accelerate? Answer in units of m/s.

What was perphaps the greatest challenge of human space flight?

Which process requires the addition of energy to water?

I'm Always in front of you. but you never see me. what am i?

How to indicate kinetic energy

During induction, a positively charged rod is brought near to but not touching the electroscope. The presence of the charged object above the plate of the electroscope induces charges to move down into the gold leaves, giving the electroscope an

You are operating a boat with a power ventilation system. you have just fueled this boat. how long should you let the ventilation system run before starting the engine?

The force on a current-carrying wire is a maximum when the current is moving parallel to a magnetic field. true or false

In 1999, what percentage of 36-month-old toddlers had been toilet trained? 20 percent 40 percent 60 percent 80 percent