Which actions are evidence that a chemical reaction has occurred? Check all that apply.

A: a change in color

B: the formation of a precipitate

C: a clear liquid becoming cloudy

D: a change in shape

E: the formation of bubbles

F: the formation of smoke

Calculate the Potential Energy of an object that has a mass of 14-kg and is located at a height of 24-m?

What part of the visible light spectrum produces the most light?

When driving at night switch to low-beams whenever you come within ___ ft of an oncoming vehicle. A. 300 B. 500 C. 200

Atoms Quiz Active 1 What is the main difference between protons and neutrons? O Protons have a much smaller mass than neutrons. O Protons have a much larger volume than neutrons.

Energy that flows from an object with a higher temperature to an object with a lower temperature is?

What happens to the resistance of a wire as its length increases? A. The resistance decreases. B. The resistance is not affected by a change in wire length. C. The resistance alternates between high and low values. D. The resistance increases.

What is true about molecular compounds that dissolve in water

What is a lenticular (S0) galaxy? A galaxy with a disk and central bulge like a spiral galaxy, but with no spiral arms A galaxy with a smooth brightness profile, lacking the central bulge and disk of a spiral galaxy A spiral galaxy with fuzzy and

Which process causes wells on land to become saline, making them unusable for drinking water? A. Erosion B. Echo sounding C. Eutrophication D. Groundwater infiltration

A farmer uses a tractor to pull a 150 kg bale of hay up a 15∘ incline to the barn at a steady 5.0 km/h. The coefficient of kinetic friction between the bale and the ramp is 0.40. Part A What is the tractor's power output?