a beam of light , initially travelling in the air strikes water surface at an angel of 28.5° with the normal. If the light in water is 2.22 x10^8ms-1 determine the angle of refraction?​

the answer is b ) square root of 5

it doesn't. it was imagined up in the middle ages.

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.