12. The velocity of sound in air is given by the equation - 201/773+1 where is the vecany in meters per sand and is the temperature in egrees Ceram. Pied the marreure when the very dannat is 30 meters per second round to the nearest degree
O
7,0810 C
O
6,5390
507°C
679

Asmall (but heavy) particle placed in a glass of water will follow a zigzag motion because the particle will bounce off of the water molecules it meets. this is called brownian motion. a physicist simulates this on a computer, by varying the distance a particle can travel (called the mean free length), on average, before it collides with a water molecule and assigning the change in motion to be one of 8 directions, each with a similar probability. by running the simulated particle (with the same mean free length) many times she determines that it should take 15 seconds, on average, for the particle to fall to the bottom, with a standard deviation of 1.5 seconds. next she lets a real particle fall through a glass of water and finds that it took 18 seconds. what does she conclude, and why?

#1-20 state whether the angles are alternate interior, alternate exterior, vertical, or corresponding angles.

How far could you drive on 50 gallons of gas