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3 years ago

Lemaitre (based on Hubble's observations) was the first to suggest the _____.

Physics

1 answer:

spayn [35]3 years ago

4 0

the answer would be D

hope this helps!

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An electron initially at rest is placed in an electric field 2x104 N/C directed west. The distance between the plates is 1 cm.

Luden [163]

Explanation:

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5 0

2 years ago

The Henry's law constant for CO2 is 3.6 ✕ 10−2 M/atm at 25°C. What pressure (in atm) of carbon dioxide is needed to maintain a C

xeze [42]

To solve this problem we will use Henry's law. This law states that at a constant temperature, the amount of gas dissolved in a liquid is directly proportional to the partial pressure exerted by that gas on the liquid. Mathematically it is formulated as follows:

$C = K_H*P$

Where,

$K_H$ = Henry's constant for C02 at 25°C is equal to $3.6*10^{-2}M/atm$

C = Gas concentration is 0.19M

Replacing we have,

$0.19 M = (3.6*10^-2 M/atm)*P$

$P = 5.277 atm$

Therefore the pressure of carbon dioxide is 5.277 atm

6 0

2 years ago

An upward force act on a proton as it moves with a speed of 2.0 x 10^5 meters/seconds through a magnetic field of 8.5 x 10^2

Gekata [30.6K]

Force on a moving charge is given by formula

$\vec F = q(\vec v \times \vec B)$

here we know that this force will be maximum when velocity is perpendicular to magnetic field

$\vec F = qvB$

here we know that

$v = 2.0 \times 10^5 m/s$

$q = 1.6 \times 10^{-19} C$

$B = 8.5 \times 10^2 T$

now we have

$F = (1.6 \times 10^{-19})(2 \times 10^5)(8.5 \times 10^2)$

$F = 2.72 \times 10^{-11} N$

7 0

3 years ago

What is the order of the electromagnetic spectrum from highest to lowest energy?

Drupady [299]

<span> Radio waves, microwaves, infra red, visible light, ultra violet, x-rays, gamma rays. </span>

4 0

2 years ago

Which of the following statements correctly describe the various applications listed above?

fgiga [73]

Answer:

The answer is "c,d,e, and g".

Explanation:

The correct choices can be defined as follows:

Higher-frequency microwaves aren't used in any of these systems.
Infrared waves aren't seen in each of these technologies.
Its shortest wavelength of all of the technologies listed is the above radiation generated by certain wireless networks.
These devices all produce waves of wavelengths ranging from 0.10 to 10.0 cm.

3 0

2 years ago