In a compression wave, particles in the medium move
a. perpendicular to the direction of the wave
b. opposite of the direction of the wave
c.
d.
in the same direction as the wave
in depends upon state of the medium

Let f(x) = x4- 8x2 . find the relativeextrema of this function using the second derivative test.

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?

Can you receive a shock severe enough to prevent you from releasing the wire from an ordinary outlet with dry hands? a. no b. yes explain