Which can a drop of liquid mercury can be described as?

A. A pure substance and a compound

B. An impure substance that is reactive

C. An impure substance that is unreactive

D. Pure substance and an element

Which change indicates that the universe is expanding?

Scientific theories can be changed or replaced when

Do you like the letter b? why? why not?

Determine the amount of potential energy of a 5.0-N book that is moved to three different shelves on a bookcase. the height of each shelf 1.0m, 1.5m, 2.0m

Factors that affect soil formation A. climate B. slope C. vegetation D. all of the above

As stream velocity decrease, which factor will likely increase? A) erosion of the stream bank B) deposition of material in the stream C) amount of material carried downstream D) size of the particles carried downstream

What cells in the nervous signals travel through the nervous system

A mechanic pushes a 3.60 ✕ 103-kg car from rest to a speed of v, doing 5,130 j of work in the process. during this time, the car moves 21.0 m. neglecting friction between car and road, find v and the horizontal force exerted on the car.

Anika asks Eva to roll a basketball and then a bowling ball to her. Which requires more force to roll, and why?

Why does a buoyant force act on every object in a fluid? Pressure pushing up on the bottom of the object is greater than the pressure pushing down on the top.