Which of the following is an example of how human activities are impacting the survival of species?
wolves overfeeding on rabbits
humans creating animal sanctuaries
el niño causing a shift in the migration of a school of fish
heavy rains causing a population of rodents to leave their burrow

Aknife blade is a(n) a. lever b. screw c. wedge d. inclined plane

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.

You have a resistor and a capacitor of unknown values. first, you charge the capacitor and discharge it through the resistor. by monitoring the capacitor voltage on an oscilloscope, you see that the voltage decays to half its initial value in 2.70 miss . you then use the resistor and capacitor to make a low-pass filter. what is the crossover frequency fc?