Well we can't see the picture that the teacher has, and we have to figure out what's in the picture from some clues in the answer choices. The picture seems to show an atom with 3 protons and 3 neutrons in the nucleus, and 3 electrons whizzing around the nucleus.
If that's what's in the picture, then Mike is correct (first choice), because the atomic number shows the number of protons in all atoms. There are 3 protons and the atomic number of lithium is 3.
Second choice . . . False, because electrons are not involved in the atomic mass.
Third and fourth choices . . . both false; sadly, Joan is woefully unclear on the concepts.
It's used for the intensity of a tornado
I am pretty sure that infrared waves are part of the electromagnet spectrum produces heat and with special equipment can locate people at night. I choose this options because <span>gamma rays can be harmful to people, and other options just make no sense.</span>
Explanation: <u>Nurture</u> means to close or stop a living thing from multiplying (Giving birth). <u>Nature</u> is a place where animals and plants are found. Waterfalls are also found in nature.
<u>Genes is nature.</u>
Hope this helps! :D
-<em>TanqR</em>
Answer:
Explanation:
In a thunderstorm the lightening is seen first then the roar of the lightening is heard because of the fact that speed of the light is much greater than the speed of the sound.
Given that:
Relation
M= 7 miles
t=?
where:
t= time in seconds
M= distance in miles
Now,
Putting the given values in the relation above