Acceleration usually has the symbol a. it is a vector. what is the correct way
to write the symbol to show that it is a vector?
a. â
b. a
c. a
d. ā
?

The energy of a photon was found to be 3.38 × 10–19 j. planck’s constant is 6.63 × 10–34 j • s. which color of light corresponds to this photon?

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?

Abaseball is thrown from the outfield toward the catcher. when the ball reaches its highest point, which statement is true? (a)its velocity is not zero, but its acceleration is zero. (b) its velocity and its acceleration are both zero. (c) its velocity is perpendicular to its acceleration. (d) its acceleration depends on the angle at which the ball was thrown. (e) none of the above statements are true.