For a projectile, which of the following quantities are constant during the flight: x, y, vx, vy, v, ax, ay? check all that apply. check all that apply.

a. x
b. y
c. vx
d. vy
e. v
f. ax
g. ay

C. vx

F. ax

G. ay

Explanation:

The projectile moves along a curved path towards the ground, so its x and y positions change.

Since there is no applied force in the x-direction, the acceleration in the x-direction is zero. This means, ax and vx do not change.

The projectile is under the influence of gratify, which is directed towards the ground. So its velocity increases, because its y-component of the velocity increases.

However, the y-component of its acceleration is constant, since it is gravitational acceleration.

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.

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.