What would a drummer do to make the sound of a drum give a note of lower pitch?

a. hit the drum skin with a larger force b. hit the drum skin with a smaller force

c. hit the drum skin nearer the edge d. loosen the drum skin

What happens to an isotope during radioactive decay?

22. the top of a cliff is located a distance h above the ground. at a distance h/2 there is a branch that juts out from the side of the cliff, and on this branch a bird's nest is located. two children throw stones at the nest with the same initial speed, one stone straight downward from the top of the cliff and the other stone straight upward from the ground. in the absence of air resistance, which stone hits the nest in the least amount of time?

The gun from the crime scene shows tool marks where the serial numbers are ground off. there are also tool marks on the bullets left behind. what information can the tool marks on the bullets and gun provide about the crime? what type of evidence does this information provide, individual or class?