Which of the following items does not use a wheel and axle?

A. a doorknob

B. a light bulb

C. a faucet handle

D. a clock with hands

What are the worst dangers of mixing bleach and ammonia-based cleaning solutions?

What combination of units can be used to express work

Which could possibly be the pH of gastric acid?

Even though animals can communicate with each other to a limited extent, no animal can express itself through: A : motions B : noises C : speech D : instinct

Thermal escape of an atmosphere is most pronounced on worlds where the gravity is low and the temperature is high. a. True b. False

A battery is used to?

A person riding on the roof of a freight train throws a ball forward. (a) If we ignore air drag and relative to the ground, is the ball moving faster or slower when the train is moving than when it is standing still?

Lemonade powder is stirred into water until it dissolves. Which are true statements? Check all that apply. A. Lemonade is the solute. B. Water is the solvent. C. Lemonade is the solvent. D. Water is the solute.

A skateboarder is accelerating forward. How would his acceleration change if he had more mass? A. His acceleration would decrease. B. His acceleration would be zero. C. acceleration would stay the same. D. acceleration would increase.

What is phanerogam? mention it's two group