10) “The plant has purple stem and leaves and gives poor yield" By referring to the above deficiency symptom, which nutrient is absent in the soil?
a) Calcium
b) nitrogen
c) potassium
d) phosphorus

Photoelectrons with a maximum speed of 6.50 x 107 m/s are ejected from a surface in the presence of light with a frequency of 6.75 x 1014hz. if the mass of an electron is 9.10 x 10-31 kg, calculate in joules the maximum kinetic energy of a single electron. 3.84 x 10-15 j 1.92 x 10-15 j 5.92 x 10-23 j 3.07 x 10-16 j

The least penetrating form of radiation is

Newtons view of arrangement of the universe. don't copy from anywhere.