The sum and difference of two non zero vectors are A=(Axi + Ayj + Azk) and B=(Bxi + Byj +Bzk) are perpendicular to each other. show that the magnitude of the two vectors are equal.

Awoman stands a distance d from a loud motor that emits sound uniformly in all directions. the sound intensity at her position is an uncomfortable 2.0×10-3 w/m2. at a distance 2.6 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?

Suppose a soccer ball is kicked from the ground at an angle 20.0º above the horizontal at 8.00 m/s. the y-velocity is determined to be 2.74 m/s. how long will the ball be in the air? assume the ball lands at the same height at which it was kicked.