3 years ago

How is dark matter detected in the universe?

1 answer:

5 0

<span>researchers have been able to infer the existence of dark matter only from the gravitational effect it seems to have on visible matter</span>

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Thermodynamic Processes

goblinko [34]

Answer:

A. Part a is the attachment

B. total work = 10.4kj

Explanation:

$workdone=nRT1ln\frac{Vb}{Va}$

T1 = constant temperature

nRT1 = PaVa = PbVb

We write equation as

$workdone =(PaVa)ln\frac{Vb}{Va}$

5ma = Pa, 5L = Va, Vb = 10L(temperature is doubled)

$w1 = workdone =(5mpa*5L)ln\frac{10L}{5L}$

W1 = 25 ln2

W1 = 25 x 0.693

= 17.327kj

The isochoric expansion has no change in volume. So,

W2 = 0

Isothermal compression

$w3=nRT3ln\frac{Vd}{Vc}$

T3 = constant temperature

nRT3 = PcVc = PdVd

$workdone=(PcVc)ln\frac{Vd}{Vc}$

Pc = 1mpa Vc = 10L Vd = 5L

$w3=(1)(10)ln\frac{5L}{10L}$

= 10x-0.693

= -6.93kj

Isochoric compression has no change in volume. Workdone w4 = 0

Total workdone = w1 + w2 + w3 + w4

= 17.33 + 0 + (-6.93) + 0

= 10.4kj

5 0

2 years ago

The three particles that make up atoms are Question 9 options: protons, neutrons, and isotopes. positives, negatives, and neutra

serious [3.7K]

Answer: protons , neutrons and electrons

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3 years ago

A uniform electric field of magnitude 110 kV/m is directed upward in a region of space. A uniform magnetic field of magnitude 0.

Marizza181 [45]

Answer:

1.7×10^5 ms-1

Explanation:

From

qE= qvB

q= charge on the electron

E = electric field

v= velocity

B= magnetic field

E= vB

v= E/B= 110×10^3/0.6

v= 1.7×10^5 ms-1

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3 years ago

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Why does a comet's tail point away from the Sun? 1Choice 1 The solar wind blows the tail away from the Sun. 2 It is being pulled

AnnyKZ [126]

Choice 1

The Sun's radiation and solar wind cause the dust and gas around the comet (coma) to stretch the coma. The solar wind electromagnetically blows the ions in the coma away.

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3 years ago

To understand the first law of thermodynamics and its origin. By relating heat, thermal energy, and work, the first law lays the

sergejj [24]

Answer:

okay

Explanation:

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3 years ago