A baseball batter hits an incoming 40-m/s fastball. The ball leaves the bat at 50 m/s after a ball on bat contact time of 0.030 s. What is the force exerted on the 0.15-kg baseball

An important dimensionless parameter concerned with very high-speed flow is the mach number, defined as v/c, where v is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. for a projectile traveling at 1170 mph through air at 50 ˚f and standard atmospheric pressure, what is the value of the mach number?

Which planet do you think would be easiest for humans to colonize some day?

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?