A protozoan swims with a speed of 3.54 mm/s. How much time (in s) would it take this protozoan to swim directly across a petri dish having a diameter of 8.07 cm?

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.

Two positive charges are equal. which has more electric potential energy?

Aforce f making an angle with the horizontal is acting on an object resting on the table. which statement is true for the motion of sliding the object on the table?