Answer:
A sample of 5.2 mg decays to .65 mg or to 1/8 of its original amount.
1/8 = 1/2 * 1/2 * 1/2 or 3 half-lives.
3 * 30.07 = 90 yrs for 5.2 mg to decay to .65 mg
You can get these other numbers similarly:
5.2 / .0102 = 510 requires about 9 half-lives which is 30 * 9 = 270 yrs
Answer:
An object is called a horizontal projectile if it is launched from a certain height with some initial horizontal velocity only. The initial vertical velocity of such an object is zero. But as the object falls through the atmosphere the horizontal component of velocity remains constant but vertical component increases due to gravitational acceleration.
Explanation:
Because it increases cardiorespiratory fitness and means that one has a strong heart and circulatory system. This results in being able to avoid heart disease and other dangerous diseases or disorders. Additionally, exercise can help our mental health along with maintaining weight and staying physically healthy.
Answer:
See the explanation for the answer.
Explanation:
Question 1: Both
Question 2: E
Question 3: P
Question 4: E
Question 5: E
Question 6: Both
Question 7: E
Question 8: Both
Question 9: E
Question 10: E
Question 11: E
Question 12: Both
Question 13: The three statements that the modern cell theory made were how in all organisms the cell is the smallest living unit, how all living things consist of cells, and that all cells are "created" from already pre-existing cells.
I think that these answers are correct. I'm sorry if they aren't, I tried my best with the assignment.
Have a lovely day!
Like a lot of other things, (gravity, sound, electrostatic force), brightness also decreases as the square of the distance.
When the source moves to a new position that's 4 times as far away, its apparent brightness becomes (1/4^2) its original value.
That's 1/16 .
