Investigator Campbell has bullets that were collected from the crime scene and puts them under her comparison microscope. What other item would she need to examine? The victim's clothing with the gunshot hole

Test bullets fired from the suspected gun

A bullet that has been fired into a wall or hard surface

The barrel of the suspected gun

True or false: the revolution of the earth creates day and night as it rotates around the sun

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

Balloon a has charge q, and identical mass balloon b has charge 10q. you hang them from threads near each other. choose all of the statements with which you agree. check all that apply. a. a and b exert the same magnitude forces on each other. b. the force that a exerts on b is 10 times the force that b exerts on a. c. the angle between the thread supporting a and the vertical is < the angle between the thread supporting b and the vertical. d. the force that a exerts on b is 1/10 the force that b exerts on a.