8 POINTS AND BRAINIEST FOR CORRECT ANSWER

Two stars in a faraway part of the Milky Way are orbiting each other as a binary star system. By

natita [175]

Answer: $M_{total}=$ 1.85

Explanation: Estimate the total mass of a binary system is done by a reformulation of Kepler's Third Law, which states that the square of the period of a planet's orbit is proportional to the cube of its semimajor axis, i.e.:

$a^{3}=(M_{1}+M_{2})P^{2}$

where

a is semimajor axis in astronomical units (AU);

P is period measured in years;

$M_{1}+M_{2}$ is total mass of the two-stars system;

For the two stars faraway in the Milky Way:

1 year is equivalent of 365 days, so period in years:

$P=\frac{594}{365}$

P = 1.63 years

Calculating total mass:

$a^{3}=(M_{total})P^{2}$

$M_{total}=\frac{a^{3}}{P^{2}}$

$M_{total}=\frac{1.7^{3}}{1.63^{2}}$

$M_{total}=$ 1.85

The total mass of the two-object system is 1.85 mass units.

3 0

3 years ago

When do (object distance) is very large, what does the thin lens equation predict for the value of 1/f?

N76 [4]

Answer:

1 / f = 1 / o + 1 / i

1 / image distance + 1 / object distance = 1 focal length

If the object distance is large the image will be at about the focal length

The value of 1 / f is fixed for any one particular lense

As the object distance decreases the image must increase

The above equation can also be written as

o i / (i + o) = f or i / (i / o + 1) = f

If for instance o was very large the image would be at the focal length

6 0

3 years ago

A type of energy embodied in oscillating electric and magnetic fields is called

yaroslaw [1]

Answer: Electromagnetic radiation

Explanation:

Electromagnetic radiation is a combination of oscillating electric and magnetic fields, which propagate through space carrying energy from one place to another.

To understand it better:

This radiation is spread thanks to the electromagnetic fields produced by moving electric charges and their sources can be natural or man-made.

It should be noted that the energy of electromagnetic radiation can vary and depending on its frequency it can be useful for various situations.

4 0

3 years ago

After a water had boiled, the temperature of the water decreases by 22degrees. The mass of the water in the kettle is 0.50kg.The

kifflom [539]

Answer

46,200 J

The energy of given out when a substance is losing heat is given by:

H = mcΔθ

Where m is the mass of the substance,

c is the specific heat capacity of the substance and

Δθ is the temperature change.

H = 0.50 × 22 4200

= 46,200 Joules.

4 0

4 years ago

1. A heat engine operates between two reservoirs at T2 = 600 K and T1 = 350 K. It takes in 1.00 x 103 J of energy from the highe

Alex73 [517]

Answer:

$\Delta S_u=2.1429\ J.K^{-1}$

$W_c=416.67\ J$

Explanation:

Given:

temperature of source reservoir, $T_H=600\ K$

temperature of sink reservoir, $T_L=350\ K$

energy absorbed from the source, $Q_{in}=1000\ J$

work done, $W=250\ J$

a.

Now change in entropy of the surrounding:

$\Delta S_u=\frac{dQ_L}{T_L}$

Since heat engine is a device that absorbs heat from a high temperature reservoir and does some work giving out heat in the universe as the byproduct.

$\Delta S_u=\frac{Q_H-W}{T_L}$