According to the text in the stimulus materials, Cosmonaut Gagarin’s pencil “obeyed Newton’s first law” and floated out of reach. Using Figures 1-3 in the stimulus materials, select the two statements that best explain Newton’s first law that affects the motion of the pencil. Select one or more: A. The force acting on an object is equal to the mass of that object times its acceleration. B. Motion cannot change without an unbalanced force acting. C. For every action, there is an equal and opposite reaction. D. An object at rest tends to stay at rest, and an object in motion tends to stay in motion, with the same direction and speed. E. The more force, the more the acceleration.

fighting demons

Explanation: FIGHTING DEMONS IS THE BEST-meek

FIGHTING DEMONS ALL THE WAY

Explanation:

a=d/t

a="triangle"v/t

explanation:

a = acceleration

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.