When a ray of light passes from air to water, the velocity of light in water is a)greater than that in air
b)equal to that in air
c)less than that in air
d)can't be predicted

2.The refractive index of a denser medium with respect to a rarer medium is

a) 1
b) less than 1
c) greater than 1
d) negative

The angle of incidence i and angle of refraction r are equal in a transparent slab when the value of i (in degree)is
a) 0
b) 45
c) 60
d) 90

You are given three media A, B and C of refractive index 1.33, 1.65 and 1.46. The medium in which the light will travel fastest is
a) A
b) B
c) C
d) equal in all media

answer: electrons

gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

hope this ! : )