Which eon of the geological time scale means " visiblr life "

A. phanerzoic

B. proterozoic

C. hadean

D. archean

Critical mass is the ___ of material required to produce a chain reaction. A.) minimum amount B.) atomic mass C.) precise amount D.) maximum amount

If an object is neutrally buoyant (does not sink or float) in fresh water, the same object placed into salt water wouldA sink. B either sink or float. C do nothing. D float.

A room that has an average ambient sound pressure level of 62 dBA and a maximum sound pressure level lasting more than a minute at 68 dBA must have a public mode signal that is at least?.

What does g-force mean?

Students asked to measure the temperature of a reaction beaker recorded the following temperatures. 103.7°C, 108.4°C, 105.8°C, 104.6°C The actual temperature is 105.1°C. Which measurement is the most precise

How the properties of sound waves change as they spread out in a spherical pattern

If legos are plastic can they be recycled?

At an accident scene on a level road, investigators measure a car's skid mark to be 93 m long. It was a rainy day and the coefficient of friction was estimated to be 0.35.

How does a shorter wavelength affect the frequency of a wave?

Which property of a filled balloon would be unchanged on the moon where there's no air and less gravity? A. mass B. weight C. volume D. density