11. If the work function of the cathode metal is 3.0 eV, what is the least energy of the incident photon it could emit photoelectron?
a. 1.50 eV
b. 2.90 eV
c. 3.50 eV
d. 6.01 eV

In a vernier instrument the main scale is in 1/2 mm divisions .vernier is made by redividing 19 such divisions into 20 equal parts. calculate the least count of the instrument.

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

Complete the statement about memory improvement. ( )involves organizing and breaking down information into easier groups to expand capacity. rehearsal is the verbal repetition of information. these techniques are especially important for the improvement of ( ) memory.