Which types of galaxies tend to be made up of very old stars and contain very little gas and dust matter?

Which statement describes a reason to consider air a mixture?

High, thin white feathery clouds containing ice crystals are usually associated with fair weather but they can also indicate approaching storms these clouds are called ___ clouds

Which of the following is the best definition of viscosity? A. the tendency of a fluid to support a floating object B. the ability of a fluid to transmitted a force C. the thickness of a fluid, or its resistance to flow

Which term describes a test that scientist use to answer a question?

Which is true? An ideal emf device has internal resistance and a real emf device does not. A real emf device sets up a potential difference and an ideal emf device does not.

A flash of white light containing all the colors of the visible spectrum in air shines straight down on the surface of a pool.

A car accelerates uniformly from 0 to 15m/s in 5 s. Calculate acceleration.

Which device would a sleep researcher use to monitor a sleeping person's brain waves?

An experiment is performed to obtain the value of a physical property. If the true (i. e., correct) value of the property is 50 and the measured (i. e., experimental) value is 32, the percent error of the experimental result is:

White moths were found in huge numbers in the city of Birmingham. These moths could be easily camouflaged by the trees. Because of sudden industrial development, the trees in the city were covered with soot.