A car travels between two towns 80 miles apart in 2 hours. What is its average speed?
2 answers:
Answer:
Average speed of the car is 40 miles per hour
Explanation:
It is given that,
Distance covered by the car, d = 80 miles
Time taken by the car, t = 2 hours
We need to find the average speed of the car. It is given by :
v = 40 miles/hour
So, the average speed of the car is 40 miles per hour. Hence, this is the required solution.
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Answer:
Explanation:
Let the critical angle be C .
sinC = 1 / μ where μ is index of refraction .
sinC = 1 /1.2
= .833
C = 56°
Then angle of refraction r = 90 - 56 = 34 ( see the image in attached file )
sin i / sinr = 1.2 , i is angle of incidence
sini = 1.2 x sinr = 1.2 x sin 34 = .67
i = 42°.
Given :
Liquid is poured into a burrete so that it reads 14cm³.
50 drops were run each of volume 0.1cm³ .
To Find :
The volume of liquid in burrete after 50 drops.
Solution :
Volume of each drop, v = 0.1 cm³.
Initial volume in burrete, V = 14 cm³.
Now, volume left after droping 50 drops are :
Therefore, the volume left in burrete is 9 cm³ .