Kate is researching air pollution and finds some information on ozone. she knows that ozone is a good thing as part of the ozone layer, so why is it also an air pollutant?
a) at ground level, ozone contributes to smog.
b) we breathe out ozone, adding it to the atmosphere.
c) ozone breaks into carbon dioxide.
d) it contributes to global warming.

When an object is heated it contracts. a. true b. false

The average time that it takes for the car to travel the first 0.25m is s. the average time to travel just between 0.25 m and 0.50 m is s. given the time taken to travel the second 0.25 m section, the velocity would be m/s.

An astronaut on the moon throws a baseball upward. the astronaut is 6 ft, 6 in. tall, and the initial velocity of the ball is 3030 ft per sec. the height s of the ball in feet is given by the equation s equals negative 2.7 t squared plus 30 t plus 6.5s=−2.7t2+30t+6.5, where t is the number of seconds after the ball was thrown. complete parts a and b.