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Hunter-Best [27]
3 years ago
10

Which statement about an element’s average atomic mass is correct? a. It is determined by counting the number of isotopes in a s

ample of the element. b. It is equal to one-twelfth the mass of the most common isotope. c. It is a weighted average, so common isotopes have a greater effect than uncommon ones. d. It is based on an isotope’s charge, so negatively charged isotopes have a greater effect than positive ones. Please select the best answer from the choices provided A B C D
Physics
1 answer:
Nat2105 [25]3 years ago
6 0
Answer choice C is the best answer
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PLEASE HELP! Daniel is 50.0 meters away from a building. He observes that his line-of-sight to the tip of the building makes an
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The lens changes the focal distance of the eye so that you can focus on images/objects. 
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Find the angle of depression from the top of a lighthouse 250 feet above water level to the water line of a ship 2.5 miles offsh
Rudik [331]
Height of the lighthouse = 250 feet
Distance of the ship from the shore = 2.5 miles
We already know that
1 mile = 5280 feet
Then
2.5 miles = 5280 * 2.5
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Now, to find the angle of depression, we can use the formula
<span>θ = <span>tan<span>−1 </span></span>(13200/250)
</span>   = 1.50 degrees
I hope that this is the answer that you were looking for and the answer has come to your desired help. 
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