Answer:
Three, the liquid in the man's cup, the stove is solid, and the air around them is a gas
Explanation:
Answer:
Boron
Explanation:
(a)
H means hydrogen
The atomic mass of hydrogen is 1 and the mass number is 2.
Be means beryllium
The atomic number is 4 and the mass number is 9.
n mean neutron, atomic number is 0 and mass number 1.
By conserving the charge,
the atomic number of X = 1 + 4 - 0 = 5
the mass of X = 2 + 9 - 1 = 10
The element having atomic number 5 and mass number 10 is Boron (B).
That's called wave <em>REFRACTION</em>.
Gravity is a force acting on a object
Answer:
Explanation:
V = J/C
V = 20/1
= 20 v
Option A is the correct answer
