What does a simple pulley do

The time required to produce one cycle of a wave is known as the waves

The average human hair has a diameter of 100,000 nm. We can see individual hairs because hair has a diameter greater than the wavelengths of the visible spectrum. (ranges from about 700 to 400 nm). An individual iron atom has a diameter of about 0.

What is the force required to lift the balloon with V=1500m3 and m=420kg, containing air with density 0.8kg/m3 and moving in air with density 1.3 kg/m3?

You find an unknown substance that cannot be separated by filtration, evaporation, or distillation. Would the explanation that this substance is an element be scientifically valid?

The filament in a lightbulb provides a demonstration of which phenomenon?

4. The amount of distance you need to stop the car increases with specu. A. true B. false

What are the three most abundant gases in the dry atmosphere?

What happens when you open a soda? Why?

car A start 10 meters ahead of car B. Car A moves at v = (3.0i+0j) m/s and car B moves forward at v = (7.0i+0j) m/s how many seconds does it takes car B to catch up

How does scientific knowledge develop through making observations about the natural world?