efficiency=work output/work input×100
since it exhausts(use up)3000j of heat that's the work input and the 1500j is the work input
efficiency=1500/3000×100
=50%
Answer:
Work function of the metal is 3.24 eV.
Explanation:
It is given that,
Wavelength, 
Let W is the work function of the metal. It is given by using Einstein's photoelectric effect equation. It is given by :
Since, 
So, W = 3.24 eV
So, the work function of the metal is 3.24 eV. Hence, this is the required solution.
Answer:
True
Explanation:
If two partners don't communicate they'll grow apart and it may lead to one or the other cheating.
The average velocity as velocity is equal to displacement/time
Answer:
Option 4
Explanation:
A constellation can be defined as that region formed by the stars in such a way that the formation by the group of stars in that area appear to seem an imaginary pattern of some mythological creature, animal, god or some inanimate object formed apparently.
Thus in accordance with the above definition a constellation is a group of stars that forms some apparent pattern in the celestial sphere.
