Which two reactions are faster than the others? O A. Black powder in fireworks burns explosively to produce gases and
white light.
O B. Iron metal reacts with oxygen in air to form rust.
O C. Silver tarnishes in air that contains hydrogen sulfide.
D. Lead nitrate and potassium iodide react to form a yellow
precipitate.

Which of the following is an example of motion in two dimensions?

What happens when you slowly pulled the carboard?

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.