Physics, 27.06.2019 13:40, anzeller6363
Which statement is true a. the speed of sound in air is inversely proportional to the temperature of the air b. the speed of sound in air is directly proportional to the temperature of the air c. the speed of sound in air is twice the temperature of the air d. the speed of sound is not affected by the temperature of the air
Answers: 1
Physics, 21.06.2019 21:50, jferdi2005
When applying kirchhoff's rules, one of the essential steps is to mark each resistor with plus and minus signs to label how the electric potential changes from one end of the resistor to the other. the circuit in the drawing contains four resistors, each marked with the associated plus and minus signs. however, one resistor is marked incorrectly. which one is it?
Answers: 1
Physics, 22.06.2019 19:30, isiahb123
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.
Answers: 1
Which statement is true a. the speed of sound in air is inversely proportional to the temperature of...
Mathematics, 22.06.2019 13:30
Mathematics, 22.06.2019 13:30