Which represents a correct match between ideas related to the formation of the universe? select the two correct answers.
a: greatest percent of mass of universe - dark matter
b: glowing nebula - dark energy
c: accelerating expansion - dark energy
d: structures forming in the early universe - dark matter

Which lists the organs in the correct order as food passes from the mouth to anus?

You have a resistor and a capacitor of unknown values. first, you charge the capacitor and discharge it through the resistor. by monitoring the capacitor voltage on an oscilloscope, you see that the voltage decays to half its initial value in 2.70 miss . you then use the resistor and capacitor to make a low-pass filter. what is the crossover frequency fc?

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.