An airplane's velocity has an X-component of -155 mph and a y-component of -45 mph. What are the magnitude and direction of the plane's velocity.

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

An object has a weight of 500 on earth what is the mass of this object

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.