Answer:
The answer to your question is: 20
Explanation:
Atomic number is the number of proton and atom has. Each element has a specific number of protons, if the number of protons change, then this is a new element.
Mass number is the number of protons and neutrons and atom has.
Mass number = protons + neutrons
Data
Number of protons = ?
Atomic number = 20
Then,
atomic number = number of protons = 20
You can find your answer here www.rsc.org/education/teachers/resources/jesei/minerals/students.htm
E = 300km * 2000J/km = 600000J
The rotational energy is given by:
E = 0.5 * I * ω²
I for a uniform cylinder is given by:
I = 0.5 * m * r²
Resulting equation:
E = 0.25 * m * r² * ω²
Given values:
ω = 430 rev/s = 430 * 2π / s
E = 600000
Solve for r.
Answer:
When air temperature is higher, the weather is warmer.
Answer:
Momentum of 2nd ball is
direction is given as
Explanation:
As we know that there is no external force on the system of balls so momentum before and after collision will be conserved
So we have
now after collision momentum of two balls is must be same as initial
so we have
so we have
for other component we have
Momentum of 2nd ball is given as
direction is given as
