Answer:
B 20 sec
Explanation:
if you look at 1992 you can see that it is on 20 sec
Answer:
Erwin Chargaff.
Explanation:
Rule of Chargaff was that any cell organism from the DNA should maintain a ratio of 1:1, this ratio rule is called base pair rule.
And this ratio is maintain between pyrimidine and purine bases and the amount of cytosine should be equal to guanine and also the amount of thymine should be equal to adenine.
Both type of DNA strands show this pattern and this rule was discovered by a chemist who belong to Austria, named was Erwin Chargaff.
Answer:
(b) a hydrogen atom
Explanation:
Wavelength is inversely proportional to energy. So we have to find the system for which the second photon has smaller energy than the first one.
For the harmonic oscillator, the energy level spacing remains the same as the quantum number increases.
For the hydrogen atom, the energy level spacing decreases as the quantum number increases.
For the particle in a box, the energy level spacing increases as the quantum number increases.
Principle: Pythagorean theorem
Given:
Let a = boat velocity = 25 miles per hour
b = river velocity = 10 miles per hour
Required: c = actual velocity
Solution:
c^2 = a^2 + b^2
c^2 = (25)^2 + (10)^2
c^2 = 725
(c^2)^0.5 = (725)^0.5
c = 26.93 miles per hour
<em>ANSWER: Actual boat velocity is 26.93 miles per hour</em>
