Answer:
68.57 mile/hour
Explanation:
The distance from Yakima to Ellensburg is 50 miles and you travel with 60 miles/hour for the first 25 miles, then 80 miles/hour for the last 25 miles. The easy way to solve this question is to find the total time needed to travel.
The time needed to travel 25 miles with 60 miles/hour speed will be: 25 miles/ (60 miles/hr)= 0.42 hr
The time needed to travel 25 miles with 80 miles/hour speed will be: 25 miles/ (80 miles/hr)= 0.31 hr
Total time needed to travel 50 miles will be: 0.41 hr + 0.31hr = 0.73 hr
The average speed will be:
average speed= sum of travel distance/ sum of time needed= 50 miles/ 0.73hr= 68.57 mile/hr
I don't know what the tables you have look like but her <span>displacement</span> would be -1m
Answer:
A quasar is an extremely bright, distant object visible to radio telescopes.
Answer:
Redshift, or lower power
Explanation:
doppler effect
waves get stretched when you are moving away from something, and squished when you are moving towards it. Imagine you have a long, bent wire. if you stretch out the wire, the wavelength becomes longer. This also applies to sound.