mass number is defined as sum of number of protons and neutrons
so here for Isotope A
Isotope A contains 56 protons and 80 neutrons.
Mass number will be given as
For Isotope B
Isotope B contains 55 protons and 81 neutrons.
For Isotope C
Isotope C contains 57 protons and 80 neutrons.
For Isotope D
Isotope D contains 56 protons and 74 neutrons.
<em>So here Isotope A and Isotope B has same mass number</em>
A) 0.3
The initial kinetic energy of the stream of spores is
where m is the mass of the spores and v = 3.6 m/s is their initial speed.
The final gravitational potential energy (at the point of maximum height) of the spores is
where g=9.8 m/s^2 is the acceleration due to gravity and h = 20 cm = 0.20 m is the maximum height.
Therefore, the fraction of kinetic energy converted to final potential energy is
So, about 30% of the initial kinetic energy is converted into potential energy.
B) It has been transformed into thermal energy of the spores and surrounding air
In fact, because of the presence of the air resistance during the motion of the spores, some of the mechanical energy of the spores is "wasted" and converted into thermal energy (heat) of the spores and the surrounding air. Without the air resistance, the mechanical energy would be conserved, and the final potential energy of the spore would be equal to the initial kinetic energy.
Answer:
Red light has longer wavelength, while blue light has higher frequency
Explanation:
Red light and blue light corresponds to two different portion of the visible part of the electromagnetic spectrum.
The two colors have different wavelengths - more precisely:
Blue: 450 - 500 nm
Red: 620 - 750 nm
So, we see that red light has a longer wavelength than blue light.
Moreover, the frequency of an electromagnetic wave, f, is inversely proportional to the wavelength, :
where c is the speed of light. This means that blue light, which has a shorter wavelength, has a higher frequency than red light.