Anwer:Planck's equation
Explanation:
Due to the fact that Einstein had to calculate to make his experiments
Answer:
The missing species is carbon-12
.
The nuclear equation should be
.
Explanation:
Let
represent the mass number of the missing species, and let
represent its atomic number.
.
For this question, there are three things to consider:
- The sum of the mass numbers should be conserved.
- Since there's no beta particle (
or
) involved, the sum of the atomic numbers should also be conserved. - The atomic number of the missing species should correspond to atomic symbol.
<h3>Mass Number</h3>
The sum of the mass numbers on the left-hand side of this reaction is:
.
The sum of the mass number on the right-hand side (including that of the missing species) is
.
These two numbers should be the same. In other words,
. Therefore, the mass number of the missing species would be
.
<h3>Atomic Number</h3>
The sum of the atomic numbers on the left-hand side of this reaction is:
.
The sum of the mass number on the right-hand side (including that of the missing species) is
.
These two numbers should be the same. In other words,
. Therefore, the mass number of the missing species would be
.
<h3>Symbol</h3>
The atomic number
of the missing species is
. Look up a modern periodic table. The element with atomic number
Distance travel = 400km
Time it took to travel 400km = 5 hr
Average speed = (distance travel)/(Time for that travel)
s = 400km/5h = 80km/hr
The average speed is 80km/hr.
Answer:29.41 m/s
Explanation:
Given
Height of cliff 22.8 m
Height of river bank=2.4 m
width of river=60.0 m
Car can considered as projectile
Time travel to cover vertical distance=22.8-2.4=20.4 m



t=2.04 s
Range=60 m
Let u be the speed of car
ut=60
