Given two vectors a⃗ =−2.00i^+3.00j^+4.00k^ and b⃗ =3.00i^+1.00j^−3.00k^. obtain a unit vector perpendicular to these two vectors.

Find the momentum for a 2.6-kg brick parachuting straight downward at a constant speed of 8.4 m/s .

You are driving directly behind a pickup truck, going at the same speed as the truck. a crate falls from the bed of the truck to the road. (a) will your car hit the crate before the crate hits the road if you neither brake nor swerve? (b) during the fall, is the horizontal speed of the crate more than, less than, or the same as that of the truck?

Why do some scientists and archeologists think that volta was not the first person to build a battery