Which of the options is the best definition of a vector?

a. a specific type of imaginary number
b. a quantity with both magnitude and direction
c. a magnitude described as a number
d. the magnitude of a value

What is the magnitude of the acceleration vector which causes a particle to move from velocity −5i−2j m/s to −6i+ 7j m/s in 8 seconds. answer in m/s.

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?

Why is a noble gas different from other elements