Four forces act on an airplane as it flies through the air. These four forces
contribute to a stabilized, level flight.
-Drag
Thrust-
Weight
Which of the following is a pair of opposing forces?
O A. weight and drag
O C. lift and weight
OB. drag and lift
O D. thrust and lift

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2

A47.2 g block of copper whose temperature is 480 k is placed in an insulating box with a 91.8 g block of lead whose temperature is 200 k. (a) what is the equilibrium temperature of the two-block system? (b) what is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c) what is the change in the entropy of the two-block system? the heat capacities of copper and lead are 386 j/kg·k and 128 j/kg·k, respectively.

Which planets are visible without a telescope