Answer:
i don't get what I have to do
The answer is B) evaporation,condensation, precipitation, runoff/storage
3. The nuclear potential that binds protons and neutrons in the nucleus of an atom
is often approximated by a square well. Imagine a proton confined in an infinite
square well of length 10−5 nm, a typical nuclear diameter. Calculate the wavelength
and energy associated with the photon that is emitted when the proton undergoes a
transition from the first excited state (n = 2) to the ground state (n = 1). In what
region of the electromagnetic spectrum does this wavelength belong?
Answer 3
We are given that,
Length of square well = L = 10−5
nm = 10−14 m.
Energy of proton in state n is given by,
En =
π
2n
2~
2
2mpL2
,
where L is the width of the square well.
⇒ E1 =
π
2~
2
2mpL2
E2 =
4π
2~
2
2mpL2
·
We can't tell from the information given.
Density is the RATIO of mass to volume. So, if mass and volume both
increase but their ratio decreases, then the density decreases.
But if mass and volume both increase and their ratio also increases,
then the density increases.
Examples:
-- Start with a pile of some kind of substance.
Mass = 150 grams
Volume = 100 cm³
Density = (mass) / (volume) = (150 gm)/(100cm³) = 1.5 gm/cm³
-- Add 50 grams of mass. Mass = 200 gm.
Add 50 cm³ of volume. Volume = 150cm³.
Density = (mass) / (volume) = (200 gm)/(150 cm³) = 1.33 gm/cm³.
Density decreased.
-- To the original pile, add 100 grams of mass. Mass = 250 gm.
add 50 cm³ of volume. Volume= 150 cm³.
Density = (mass) / (volume) = (250 gm)/(150 cm³) = 1.67 gm/cm³.
Density increased.
-- To the original pile, add 60 grams of mass. Mass = 210 gm.
add 40 cm³ of volume. Volume = 140 cm³.
Density = (mass) / (volume) = (210 gm)/(140 cm³) = 1.5 gm/cm³.
Density no change.
Same as the original pile.
Answer:
The resistance of the lamp is 4Ω.
Explanation:
You have to apply voltage formula :
V = I × R
R = V ÷ I
R = 240 ÷ 60
R = 4 Ω