Given :
You drive 200 miles in 3 hours before stopping for lunch and gas. After lunch you travel 250 miles in an hour and a half.
To Find :
Average speed.
Solution :
We know, average speed is given by :

Therefore, average speed of the journey is 100 miles/hr.
Hence, this is the required solution.
Just assume that the sun has the average mass of all the stars
Then divide the mass of the galaxy by the mass of the sun.
<span>10^30 has 30 zeroes after it. 10^42 has 42 zeroes.
The answer would have 12 zeroes which concludes a trillion stars. </span>
Answer: Sound waves are a waves of compression and rarefaction, by which sound is propagated in an elastic medium such as air.
Explanation:
In physics, sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid.
George Miller. he provided two very important ideas with respect to cognition. The first regards short term memory, while the second one is planning (TOTE). He set the stage for considering humans behavior as a set of responses that occur hierarchically.