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3 years ago

What part of a refracting telescope would you measure to find the aperture? *

Chemistry

2 answers:

andrezito [222]3 years ago

6 0

Answer:

Objective

Optics

For an optical instrument, the aperture is the diameter of the objective lens (refracting telescope) or the primary mirror (reflecting telescope). The larger the aperture, the more light the telescope can gather, and the fainter the limiting magnitude of the instrument.

Explanation:

Harrizon [31]3 years ago

3 0

Eyepiece (have a blessed day

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Convert 7.89 x 10^8 molecules of water to liters.

NNADVOKAT [17]

Answer:

2.94 x 10⁻¹⁴L

Explanation:

To solve this problem, we have to assume that the condition of this water is at standard temperature and pressure, STP.

At STP;

1 mole of gas have a volume of 22.4L

So, let us find the number of moles of this water first;

6.02 x 10²³ molecules can be found in 1 mole of a substance

7.89 x 10⁸ molecules will contain $\frac{7.89 x 10^{8} }{6.02 x 10^{23} }$ = 1.31 x 10⁻¹⁵mole of water

So;

Volume of water = 22.4 x 1.31 x 10⁻¹⁵ = 2.94 x 10⁻¹⁴L

5 0

3 years ago

What is the range of pH values in a basic solution?

vovikov84 [41]

Answer:

b. ph is greatet than 7

Explanation:

ph=7 neutral

ph=7-14 basicity as you go up increase basicity

ph=0-7 acodity as you go down increasing acidity

8 0

3 years ago

How do scientists use radioactive decay to date fossils and artifacts

RideAnS [48]

The level of radioactivity allows them to date fossils and artifacts

4 0

3 years ago

Some instruments differentiate individual quanta of electromagnetic radiation based on their energies. assume such an instrument

bulgar [2K]

Answer:

5.68×10¯¹⁰ m

Explanation:

From the question given above, the following data were obtained:

Energy (E) = 3.50×10¯¹⁶ J

Wavelength (λ) =?

Energy (E) and wavelength (λ) are related according to the following formula:

E = hv/λ

Where

E => is the energy

h => is the Planck's constant

v => is the velocity of electromagnetic radiation

λ => is the wavelength of the radiation.

With the above formula, we can obtain the wavelength of the radiation as follow:

Energy (E) = 3.50×10¯¹⁶ J

Planck's constant (h) = 6.63×10¯³⁴ Js

Velocity (v) = 3×10⁸ m/s

Wavelength (λ) =?

E = hv/λ

3.50×10¯¹⁶ = 6.63×10¯³⁴ × 3×10⁸ / λ

3.50×10¯¹⁶ = 1.989×10¯²⁵/ λ

Cross multiply

3.50×10¯¹⁶ × λ = 1.989×10¯²⁵

Divide both side by 3.50×10¯¹⁶

λ = 1.989×10¯²⁵ / 3.50×10¯¹⁶

λ = 5.68×10¯¹⁰ m

Thus, the wavelength of the radiation is

5.68×10¯¹⁰ m

7 0

3 years ago

An exploratory robot was sent to the planet mars. The gravity on mars is weaker than the gravity on earth. Compared to the mass

Semmy [17]

Answer: An object has a weight of 10 kg on the surface of Earth. If the same object were transported to the surface of Mars, the object would have a weight of 3.8 kg. The density of the object is greater on Earth than it is on Mars.

Explanation:

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3 years ago