A large catapult is used to launch a pumpkin. When the catapult releases the pumpkin, the pumpkin is located 25.0 m above the ground. If catapult launches the pumpkin at a velocity of 25 m/s at 20 degrees above the horizontal and the pumpkin lands on the ground
a. How long will the pumpkin be in the air?

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

Calculate the ratio of h+ ions to oh– ions at a ph = 6. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 6. are they the same? why or why not? record your explanation in table a. what is the concentration of h+ ions at a ph = 6? mol/l what is the concentration of oh– ions at a ph = 6? mol/l what is the ratio of h+ ions to oh– ions at a ph = 6? : 1

The electric potential a distance r from a small charge is proportional to what power of the distance from the charge? a. r^-1 b. r c. r^-2 d. r^2