A ferry is crossing a river. The ferry is headed due north with a speed of 4.8 m/s relative to the water. If the river's velocity is 2.1 m/s east, what will the ferry's velocity be relative to an on-shore observer? Select one:

a.5.2 m/s at 24° E of N
b. 4.9 m/s at 28° E of N
c. 4.9 m/s at 62° E of N
d. 5.2 m/s at 28° E

Astone dropped into a well is heard to strike the water after 8seconds. find the depth of the well if the velocity of sound is 350m/s

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

The current in a hair dryer measures 11 amps. the resistance of the hair dryer is 12 ohms. what is the voltage?unit: