If a light ray strikes a reflective surface at angle of 30 degrees from the normal, the light is reflected at

A. an angle less than 30 degrees
B. 30 degrees from the surface
C. 30 degrees from the normal
D. 60 degrees from the normal

Increasing the pressure on one spot of a fluid will increase the pressure everywhere else in the fluid a. pascals principal b. archimedes' principal c. bernoulli's principal

Ball bearings are made by letting spherical drops of molten metal fall inside a talll tower-called a shot tower- and solidify as they fall. a-if a bearing needs 4.0 s to solidify enough for impact, how high must the tower be? b- what is the bearing's impact velocity?

Which of the following is tru about semi-conductors