Why do plants not have a exsited before cyanobacteria started producing oxygen?

Which of the following is powered by nuclear energy? A) aircraft B) automobiles C) trains D) submarines

In whick changes of state do atoms lose energy? Check all that apply

explain why when a ball is hit and it moves forward while spinning it may swerve to one side instead of moving straight

A sequence of pitches occurring one after another is perceived: A. horizontally B. vertically C. texturally D. mechanically

Vector A has components Ax=1.30cm, Ay = 2.25cm; vector B has components Bx=4.10cm, By=-3.75cm. Find a. the components of the vector sum A+B; b. the magnitude and direction of vector A+B; c. the components of the vector difference B-A; d.

PV = nRT, is the a. equation of state of an ideal gas b. theorem of equipartition of energy c. second law of thermodynamics

Which conducting electricity has the most harmful effects?

Which is the farthest known planet from the sun? a. Jupiter b. Saturn c. Uranus d. Neptune

Laser light of wavelength 470 nm shines on a pair of slits at normal incidence, producing a pattern of maxima on a large screen 92.0 cm away from the slits. The second order maximum is observed to be 31.7 cm away from the central maximum. a.

What does the slope of a line of best fit represent