Why does a heavier aircraft have to move faster before it becomes airborne

What is the key difference between mechanical and electromagnetic waves

Which best describes how temperature, humidity, and pressure vary within an air mass? Temperature and humidity vary, but pressure does not. Temperature, humidity, and pressure are basically the same all through an air mass.

A large ebony wood log, totally submerged, is rapidly floating down a flooded river. If the mass of the log is 165 kg, what is the buoyant force acting on the submerged log?

When you rub against a rough surface

What is the Doppler effect, and how does it alter the way in which we perceive radiation?

How do you relate and explain a planet's distance from the Sun to things like the time of their year & their average tempareature

Describe the steps used by conventional sewage treatment plants to break down our sewage into a relatively safe effluent that gets dumped into a river, lake, or ocean.

During melting, the forces of attraction between the molecules A) become weaker. B) remain the same. C) become stronger. D) become stronger and then weaker.

What law states that when matter undergoes a physical or chemical change, no atoms are created or destroyed?

If the moon disapared what affect would this have on earths tides