What's an air column

A car has an initial velocity of 2.4 m/s and accelerates at a constant acceleration to a velocity of 20 m/s over a time period of 20 s. Determine the car's displacement over the period.

KCl (aq) + AgF (aq) → AgCl (s) + KF (aq) If 0.45 moles of potassium chloride are consumed completely and we start with twice as much silver fluoride, how many moles of solid silver chloride will be produced?

Catalysts are used to make a chemical reaction do what? A. Ignite B. Change C. Go faster D. Activate

2 inches of rain fall in 30 minutes what is the rate

A slightly bruised apple will rot extensively in about 2.5 days at room temperature (25.0°C). If it is kept in the refrigerator at 0.5°C, the same extent of rotting takes about 17 days. What is the activation energy for the rotting reaction?

How has increased energy use associated with scientific advancements affected society? a. It has led to an increase of the concentration of atmospheric carbon dioxide. b. It has led to an increase in hazardous wastes from mining operations. c.

Water is moving with a speed of 5.7 m/s through a pipe with a cross-sectional area of 4.8 cm2. The water gradually descends 9.2 m as the pipe increases to 8.8 cm2. (a) What is the speed at the lower level? (b) If the pressure at the upper level is 1.

Is Kepler's constant the same for moons orbiting a planet as it is for planets orbiting the sun? Why?

In which one of the following situations is zero net work done? A) A ball rolls down an inclined plane. B) A physics student stretches a spring. C) A projectile falls toward the surface of Earth.

Object dropped from height of 25 meters, what velocity will it hit the ground?