Answer:
heart rate increases during activity
Explanation:
You can work at 70 to 85 percent of your maximum heart rate during vigorous activity.
Answer:
b) The light slows down and it changes direction towards the perpendicular.
Explanation:
Light travels at different speed in different mediums.
Refractive index is equal to velocity of the light 'c' in empty space divided by the velocity 'v' in the substance.
Or ,
n = c/v.
Light travels at a slower speed in water as compared to air because there are more number of interfering molecules in the path of the light in case of water as compared to liquid.
<u>When a light travels from lower denser medium say water to higher denser medium say water, it bends towards the perpendicular as its speed reduces in that medium.</u>
Answer:
10 mm will be the answer my friend
The change in electric potential energy of the ion is equal to the charge multiplied by the voltage difference:

where the charge q of the na+ ion is equal to one positive charge, so it's equal to the proton charge:

, and Vf and Vi are the final and initial voltages.
Substituting the numbers, we find:
The nucleus.
The nucleus contains almost all of the mass as it also contains protons & neutrons of the atom.
Hope this helps!