3. Two carts, cart A and cart B, are moving in opposite directions. Cart A is moving away from a motion
detector at 2 m/s and cart B is moving toward the
motion detector at 1 m/s.
a. Which cart's velocity would be positive and
which would be negative? Describe your
reasoning

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided