Answer:
Refractive index of unknown liquid = 1.56
Explanation:
Using Snell's law as:
Where,
is the angle of incidence ( 65.0° )
is the angle of refraction ( 53.0° )
is the refractive index of the refraction medium (unknown liquid, n=?)
is the refractive index of the incidence medium (oil, n=1.38)
Hence,
Solving for ,
Refractive index of unknown liquid = 1.56
To keep cars safe...............
-- On Earth, 1 kg of anything weighs 9.81 Newtons (2.205 pounds). It doesn't matter what substance comprises the kilogram.
-- Although their weights are identical, any mass of feathers occupies more volume than the same mass of iron, no matter where they happen to be located.
-- Iron is more dense than feathers, and more dense than a lot of other substances as well, too.
Answer:proton is positively charged and electron is negatively charged
Explanation: electrical forces depend on the property of matter called electric charge. The charge of protons and electrons are exactly the same size but the proton is positively charged while the electron is negatively charged
a =12miles
b =10miles
ab =2miles
Explanation:
at first the car is drown out of dealership and went 10 miles east and then 8 miles south
then your friend drives 8 miles west and 6 miles north.
then the distance it flies to get back to dealership is
10²+8 ²=12miles
8²+6²=10miles
12-10= 2 miles
