We estimate the mass of the galaxy by observations of its ________ curve.

1 answer:

8 0

The appropriate response is the rotation. There are most likely no less than 100 billion planets in the Milky Way. The Solar System is situated inside the circle, around 26,000 light-years from the Galactic Center, on the inward edge of one of the winding molded centralizations of gas and tidies called the Orion Arm.

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PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!

GarryVolchara [31]

I'm in physics, but I think the answer is 22. The angle of reflection is reflecting whatever the angle was so, in this case, it must be 22

3 0

2 years ago

Read 2 more answers

A current is established in a gas discharge tube when a sufficiently high potential difference is applied across the two electro

pishuonlain [190]

Explanation:

It is given that the number of electrons passing through the cross-sectional area in 1 s is $3.4 \times 10^{18}$ . Also, we know that charge on an electron is $-1.60 \times 10^{-19} C$ , then negative charge crossing to the left per second is as follows.

I- = $3.4 \times 10^{18} electrons \times -1.6 x 10^{-19} C/electrons$

I- = 0.544 A

As it is given that the number of protons crossing per second is $1.4 \times 10^{18}$ , as the charge on the proton is $+1.60 \times 10^{-19} C$ , then positive charge crossing to the right per second is calculated as follows.

I+ = $1.4 \times 10^{18} electrons \times 1.6 \times 10^{-19} electrons/C$

I+ = 0.224 A

I = l I+ l + l I- l

So, I = 0.544 + 0.224

= 0.768 A

Thus, we can conclude that the current in given hydrogen discharge tube is 0.768 A.

8 0

2 years ago

What is the average atomic mass of an element?

arlik [135]

Calculating Average Atomic Mass. The average atomic mass of an element is the sum of the masses of its isotopes, each multiplied by its natural abundance (the decimal associated with percent of atoms of that element that are of a given isotope).

4 0

2 years ago

Azurite is a mineral that contains 55.1% of copper. How many meter of copper wire with diameter of 0.0113 in can be produced fro

soldier1979 [14.2K]

Answer:

1402.73 m

Explanation:

Mass of Azurite=3.25 lb

Percent of copper in AZurite mineral=55.1%

Diameter of copper wire,d=0.0113 in

Radius of copper wire= $r=\frac{d}{2}=\frac{0.0113}{2}=0.00565 in=\frac{565}{100000}=\frac{565}{100}\times \frac{1}{1000}=5.65\times 10^{-3}in$