Answer:
compression ratio is 7 : 1
Explanation:
given data
volume v1 = 70 cubic inches
volume v2 = 10 cubic inches
to find out
compression ratio
solution
we know that here compression ratio formula that is
compression ratio = ...................1
put here value maximum = 70 and minimum is 10
so
compression ratio =
compression ratio =
so compression ratio is 7 : 1
Answer:
Explanation:By using the sunglasses while looking at If your sunglasses are polarized, instead of only seeing the surface of a lake or river, you will suddenly be able to see through the glare and into the water below.
Another one is by comparing two sunglasses, hold your glasses and another one simultaneously and look through both pairs at the same time. Then, rotate one pair of sunglasses about 60 degrees. If both pairs of glasses are polarized, the overlapping area will darken as they filter out excess light. If your pair isn't polarized, however, you won't notice any difference.
Also it can be determined by simple computer test If you rotate your glasses sideways while looking at a computer monitor through polarized glasses, portions of your screen will become blank or go dark. The same also applicable to LCD display screens such as the ones on a gas pump.
Answer:
a) speed of the car = 22.22 m /s
b) ( i )
Explanation:
Negative work done by friction will be equal to reduction in kinetic energy of the car.
Frictional force = μ R = μ mg
work done by it = μ mg x 70 m.
Change in kinetic energy = 1/2 m v²
So , μ mg x 70 = 1/2 m v² ------------- ( 1 )
v = √2 x μ x 70 x g
= √2 x .36 x 70 x 9.8
22.22 m/s
As we have seen that m cancels out on both side of equation no ( 1 )
Answer:
1/4 of the original
Explanation:
That would be TWO half lives:
1/2 * 1/2 = 1/4 <======= 1/4 would be left