Determine whether each of the following statements is true or false, and explain why. $D_x \tan \left(x^2\right)=\sec ^2\left(x^2\right)$

If the current through a resistor is increased by a factor of 2 , how does this affect the power that is dissipated? a) It decreases by a factor of 4 . b) It increases by a factor of 2 . c) It decreases by a factor of 8 . d) It increases by a factor of 4 .

What is the density of a gummy bear?

A thin lens having a focal length of +50.0 cm is positioned 250 cm in front of (i.e., to the left of) a plane mirror. An ant sits on the central axis 250 cm in front of (i.e., to the left of) the lens. Locate the three images of the ant.