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Lyrx [107]
3 years ago
8

A type of star called a red dwarf gets its name because it is a relatively small star that appears redder than the Sun when view

ed through a telescope. Red dwarfs, therefore, _____ more red light than stars like the Sun. A. emit B. reflect C. absorb D. transmit
Physics
1 answer:
weeeeeb [17]3 years ago
5 0

Answer:

option (b) reflect

make me brainliest

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The energy levels of a particular quantum object are -11.7 eV, -4.2 eV, and -3.3 eV. If a collection of these objects is bombard
gogolik [260]

To solve this problem it is necessary to apply an energy balance equation in each of the states to assess what their respective relationship is.

By definition the energy balance is simply given by the change between the two states:

|\Delta E_{ij}| = |E_i-E_j|

Our states are given by

E_1 = -11.7eV

E_2 = -4.2eV

E_3 = -3.3eV

In this way the energy balance for the states would be given by,

|\Delta E_{12}| = |E_1-E_2|\\|\Delta E_{12}| = |-11.7-(-4.2)|\\|\Delta E_{12}| = 7.5eV\\

|\Delta E_{13}| = |E_1-E_3|\\|\Delta E_{13}| = |-11.7-(-3.3)|\\|\Delta E_{13}| = 8.4eV

|\Delta E_{23}| = |E_2-E_3|\\|\Delta E_{23}| = |-4.2-(-3.3)|\\|\Delta E_{23}| = 0.9eV

Therefore the states of energy would be

Lowest : 0.9eV

Middle :7.5eV

Highest: 8.4eV

8 0
4 years ago
Starting from rest, a 4.0-kg body reaches a speed of 8.0 m/a in 20 s. What is te net force acting on the body?
Strike441 [17]
The guy below is wrong!


F=ma
Where force = mass x acceleration

We dont have acceleration, a= change in velocity divided by the time taken.
a = v (final velocity) - u (initial) / t
a us 8-0 (at rest means u was 0) / 20 = 0.4

Using F=ma

F= mass x acceleration 
F= 4 x 0.4
F=1.6 N
5 0
3 years ago
What do we mean by the event horizon of a black hole?
Evgen [1.6K]

It is the point in a black hole where nothing, not even light, can escape from.

8 0
4 years ago
What is the value of g on the surface of saturn? assume msaturn = 5.68×1026 kg and rsaturn = 5.82×107 m?
yKpoI14uk [10]
<span>F = GMm/r^2 but we don't want force we want acceleration. F = ma combining the two ma = GMm/r^2 cancelling m from both sides a = GM/r^2 where G is the universal gravitational constant M is the mass of Saturn and r is the radius of Saturn. g(Saturn) = a = (6.67x10^-11m^3kg^-1s^-2)(5.68x10^26 kg)/(5.82x10^7m)^2 g = 11.18 m/s^2 round to 11.2 m/s^2</span>
7 0
3 years ago
One liter (1000cm3) of oil is spilled onto a smooth lake. If the oil spreads out uniformly until it makes an oil slick just one
Zepler [3.9K]

Answer:

he diameter of the oil slick is 2523 m

Explanation:

given information?

V = 1 L = 1000 cm³ = 0.001 m³

h = 2 x 10⁻¹⁰ m

first we have to find the radius using the following equation

V = πr²h

r = √V/(πh)

  = √(0.001)/(π x 2 x 10⁻¹⁰ )

  = 1261.56 m

now, we can calculate the diameter of the oil slick

d = 2r

  = 2 (1261.56)

  = 2523 m

8 0
3 years ago
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