Many extrusive volcanic rocks contain holes which have formed from:

acidic reactions

escaping gases

quartz crystals

underwater eruptions

Chris operates a small sign-making business. He finds that if he charges x dollars for each sign, he sells 44-x signs per week. What is the smallest number of signs that he can sell to have an income of $420 in one week?

El Niño occurs every 2 to 12 years. true false

Describe the path taken by electricity through an incandescent light bulb.

If a car is traveling at an average speed of 60 kilometers per hour, how long does it take to travel 12 kilometers?

Acceleration is often measured in what unit? A. newtons B. kilograms C. meters per second D. meters per second squared

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.