Will a body moving in a circular track have zero acceleration? Vividly explain your making reference to both radial and perpendicular acceleration? EV (7)
b) In your own words describe first moment of area for any shape and its importance. With reference to the shape below about the axis s – s, describe the position of the centroid.
CR (8)
c) In quantum mechanics, the fundamental constant called Planck’s constant, h, has dimensions of ML2T−1 . Construct a quantity with the dimensions of length from h, a mass m, and c, the speed of light.

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.