What is the difference between a scientific theory and a scientific law? Theories combine several laws into one.

Theories are upgraded into laws once they are proven.

Laws use mathematical explanations and theories do not.

Laws describe what happens but theories explain why or how.

Which of the following is tru about semi-conductors

2) a cubical block of stone is lowered at a steady rate into the ocean by a crane, always keeping the top and bottom faces horizontal. which one of the following graphs best describes the buoyant force b on this block as a function of time t if the block just enters the water at time t = 0 s?

Olympic skier tina maze skis down a steep slope that descends at an angle of 30∘ below the horizontal. the coefficient of sliding friction between her skis and the snow is 0.10. i found maze's acceleration which is 4.1 m/s^2. but how do you determine maze's speed 4.0 s after starting?