Lenses can be found in a variety of objects. Which example does not contain a lens?

an electron microscope

night vision goggles

a diving mask

a smart phone

During science, Jim's teacher gives this simple rule to use as a first attempt to increase solubility of the solute and the rate of solution.

The blue color of the sky results from the scattering of sunlight by air molecules. The blue light has a frequency of about 7.5 x 1014 Hz. What is the energy associated with this frequency?

In the laboratory you are given the task of separating Ag + and Cu2 + ions in aqueous solution. For each reagent listed below indicate if it can be used to separate the ions. Type "Y" for yes or "N" for no.

Earth scientist think that _ caused significant climate change in the past

The speed of a transverse wave in a string is 12 meters per second. If the frequency of the source producing this wave is 3 hertz what is it's wavelength

What is the molarity of a solution composed of 4.73 g of potassium iodide (KI) dissolved in enough water to make 0.169 L of solution? Answer in units of M.

Suppose you were given a substance and asked to determine whether or not it was a plasma. Write the characteristics you would look for to identify the substance.

What is a comet? tell in a short and easy answer

In calcium fluoride, what is the closets noble gas that each ion becomes?

Americium-241 is used in some smoke detectors. it is an alpha emitter with a half-life of 432 years. how long will it take in years for 45.0 % of an am-241 sample to decay?