According to Huygens's principle, what is the explanation for boundary behaviors? A.
Each point on a wave front acts as a source of secondary waves.

B.
Each point on a wave front stops moving as it progresses.

C.
Each point on a wave front partly reflects and partly refracts the wave.

D.
Most of the points on the wave front stop progressing.

An object is 10. cm from the mirror, its height is 3.0 cm, and the focal length is 2.0 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1.33 -1.33 +0.75 -0.75

Will mark as brainliest how does a catapult increase the trajectory of an object? ps. answer as if u were a 5th grader

Adiver named jacques observes a bubble of air rising from the bottom of a lake (where the absolute pressure is 3.50 atm) to the surface (where the pressure is 1.00 atm). the temperature at the bottom is 4.00 ∘c, and the temperature at the surface is 23.0 ∘c.what is the ratio of the volume of the bubble as it reaches the surface (vs) to its volume at the bottom (vb)? if jaques were to hold his breath the air in his lungs would be kept at a constant temperature. would it be safe for jacques to hold his breath while ascending from the bottom of the lake to the surface?