You should be extremely careful when handling a soldering iron. This is owing to the dangerous temperatures that can be reached by a soldering iron, and is evidenced by the many preventable injuries caused by soldering irons in the technical trade profession. a. True
b. False

What is the energy of a photon of ultraviolet radiation with a frequency of 4.4 × 1015 hz? planck’s constant is 6.63 × 10–34

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.

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply