Question

Brianna is rowing a small boat across a pond. The air is calm; there is no wind

blowing.
a. What type of friction is resisting her motion?

b. If two friends join her in the boat, will the friction force change? Why or why not?

PLEASE I NEEEED HEEEEEEEEEEEELP.

Answer 1

A. Fluid Friction B. Yes, there is more mass on the boat.

Step-by-step explanation:

Not very sure about B but goodluck.

Answer 2

An air bubble of volume 20 cm³ is at the bottom of a lake 40 m deep, where the temperature is 4.0°c. the bubble rises to the surface, which is at a temperature of 20°c. take the temperature of the bubble’s air to be the same as that of the surrounding water. just as the bubble reaches the surface