Samuel adds a teaspoon of salt to a glass of water. he notices that the salt disappears. samuel takes a sip to discover that the water tastes salty. what kind of change has occurred? a it’s a chemical reaction because a new substance has formed. b it’s a physical change because the water and the salt kept their original properties. c it’s an example of synthesis because two substances reacted to give one substance. d it’s a chemical reaction because the water now tastes salty but originally did not. nextreset

B) It’s a physical change because the water and the salt kept their original properties.

Explanation: Physical Process is a process which involves no change in chemical composition. The substances keep their original properties as no new compounds get formed.

When salt is dissolved in water, salt occupies the vacant spaces present between the water molecules. The salt and water do not combine chemically and can be separated by physical means. Thus it is a physical process.

answer: the correct answer id option(d).

explanation:

snell's law refraction:

the angle of refraction =

the angle of incidence =

refractive index of air = = 1

refractive index of glycerol = 1.47

from the given options, the most closest answer to 63.72° is 65° of option (d).

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000