A student completing research for a project enters the following search terms: Drugs AND prescription AND cost Which of the following best describes the likely results of this search? Sources that reference all three terms Sources that reference either of the three terms Sources that reference drugs and either prescription or cost Sources that reference the first two terms but not the third.

b, acidosis

acidosis is when the human body attempts to return the bloods ph levels back to normal when the blood is acidic

a chair, a bed, and a toothbrush

explanation:

i was told this before by a teacher, so yeah

about 40,000,000 results (0.81 seconds)  

search results

what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.