When a perfume bottle is opened, some liquid changes to gas and the fragrances spreads around the room.

The two ropes seen in (Figure 1) are used to lower a 255 kg piano exactly 6 m from a second-story window to the ground.

If two lightbulbs are parallel to each other, they have the same brightness. If the same two lightbulbs are put in series with each other, they also have the same brightness but are dimmer than when they are in parallel. Explain why.

A student is given a small object that is hanging from a ring stand on a nylon thread. The student attempts to charge the object electrically in several ways. Based upon his results, he concludes the object is made of an insulating material.

A 1.0-kg standard cart A collides with a 0.10-kg cart B. The x component of the velocity of cart A is + 0.70 m/s before the collision and + 0.50 m/s after the collision. Cart B is initially traveling toward cart A at 0.

A material is said to be ductile if it a. can be pulled out, or drawn, into a long wire. b. can be hammered or rolled into flat sheets and other shapes. c. can transfer heat or electricity to another material. d.

Which tool would a scientist use to find the mass of an object?

Who are the launched dog on moon A. mark B. lyca C. mcmc D. seul

The excerpt is from an article that Roberto read for science class called "Using the Scientific Method to Study Tomatoes." The student performed an experiment to test his hypothesis about sunlight and plant height using two plants.

Does coffee contain corn? What other food in cafes are corn? Fun fact: Almost all our food comes from corn. Corn wipe out most farmers, and corn is our mainly food. We eat it everyday.

When the amplitude of a wave triples, the intensity changes by a factor of [blank] (1/3,1/9,3,9) When the amplitude of a wave is cut in half, the intensity changes by a factor of [blank] (1/4,1/2,2,4) When the distance between the source and your