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diamong [38]
3 years ago
9

Which of the following cannot be determined from the spectrum of a star?

Physics
1 answer:
Aneli [31]3 years ago
4 0
I think the correct answer from the choices listed above would be the last option. It is the chemicals in the core of the star that cannot be determined from the spectrum of a star. Spectrum shows the different classification of the stars depending on their spectral characteristics. It usually involves the light, the wavelength and the distance.
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The winch takes in cable at the constant rate of 130 mm/s. if the cylinder mass is 115 kg, determine the tension in cable 1. neg
nikitadnepr [17]
By applying Newton's second law of motion;

ma = mg - T

Where,
m = mass; a = downward accelerations (+ve value) or upward acceleration (-ve value); g = gravitational acceleration; T = tension.

For the current case, the velocity is constant therefore,
a = 0

Then,
0 = mg - T
T = mg = 115*9.81 = 1128.15 N

Tension in the cable is 1128.15 N.
8 0
3 years ago
Who compose the Ghana national anthem​
Anna [14]

Answer:

Philip Gbeho

Explanation:

3 0
3 years ago
A body weighs 100newtons and 80newtons when submerged in water.calculate the upthrust action on the body
katovenus [111]

Answer:

20 N

Explanation:

In air, the normal force is equal to the weight.

∑F = ma

N − mg = 0

N = mg

Submerged in water, the normal force is equal to the weight minus the buoyant force:

∑F = ma

B + N − mg = 0

N = mg − B

Plugging in values:

80 N = 100 N − B

B = 20 N

3 0
4 years ago
What scientific theory was the subject of the scopes trial?
ICE Princess25 [194]
Scopes, who has substituted for the regular biology teacher was charged on May the 5th, 1925 with teaching evolution from a chapter in George William Hunters textbook. Civic Biology: Presented in problems which described the theory of evolution... Hope this helps!
7 0
3 years ago
An engineer examining the oxidation of SO 2 in the manufacture of sulfuric acid determines that Kc = 1.7 x 108 at 600 K:
kozerog [31]

Answer: p_{SO_2}=0.017atm

Explanation:

We are given:

K_c=1.7\times 10^8

Relation of K_p with K_c is given by the formula:

K_p=K_c(RT)^{\Delta ng}

Where,

K_p = equilibrium constant in terms of partial pressure = ?

K_c = equilibrium constant in terms of concentration

R = Gas constant = 0.0821\text{ L atm }mol^{-1}K^{-1}

T = temperature = 600K

2SO_2(g)+O_2(g)\rightleftharpoons 2SO_3(g)

\Delta ng = change in number of moles of gas particles = n_{products}-n_{reactants}=2-3=-1

Putting values in above equation, we get:

K_p=1.7\times 10^8\times (0.0821\times 600)^{-1}\\\\K_p=3.4\times 10^6

The chemical reaction follows the equation:

                 2SO_2(g)+O_2(g)\rightleftharpoons 2SO_3(g)

The expression for K_p for the given reaction follows:

K_p=\frac{(p_{SO_3})^2}{ p_{O_2}\times {(p_{SO_2})^2}}

We are given:

p_{SO_3}=300atm   p_{O_2}=100atm

Putting values in above equation, we get:

3.4\times 10^6=\frac{(300)^2}{100\times {(p_{SO_2})^2}}

p_{SO_2}=0.017atm

Hence, the partial pressure of the SO_2 at equilibrium is 0.017 atm.

3 0
3 years ago
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