The current in the circuit shown is 2.0 A. What is the value of R3?
Ο 10 Ω
Ο 15 Ω
Ο 20Ω
Ο 55 Ω

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Ethanol has a heat of vaporization of 38.56 kj/mol and a normal boiling point of 78.4 c. what is the vapor pressure of ethanol at 14 c?

Chameleons catch insects with their tongues, which they can rapidly extend to great lengths. in a typical strike, the chameleon's tongue accelerates at a remarkable 220 m/s2 for 20 ms, then travels at constant speed for another 30 ms.