**Top 10 cool things about stars Space EarthSky**

H-R Diagram for Stars. A Most Important Diagram Classifying stars according to their spectrum is a very powerful way to begin to understand how they work. As we said last time, the spectral sequence O, B, A, F, G, K, M is a temperature sequence, with the hottest stars being of type O (surface temperatures 30,000-40,000 K), and the coolest stars being of type M (surface temperatures around... Two similar cylinders have radii of 15 inches and 6 inches. What is the ratio of the surface area of the small cylinder to the surface area of the large cylinder? 62/87,21 Find the scale factor. The scale factor is . If the scale factor is , then the ratio of surface areas is . The ratio of the surface areas is 4:25. Two spheres have volumes of 36 cubic centimeters and 288 cubic centimeters

**12-8 Congruent and Similar Solids Determine whether each**

For stars, the rate at which energy is emitted is called luminosity. Similar to the above example, a star's luminosity can be increased by: increasing its temperature; or. increasing its surface area (or size). This relationship between size, surface temperature, and luminosity allows us to compare the sizes of stars.... For stars, the rate at which energy is emitted is called luminosity. Similar to the above example, a star's luminosity can be increased by: increasing its temperature; or. increasing its surface area (or size). This relationship between size, surface temperature, and luminosity allows us to compare the sizes of stars.

**Solutions Size Temperature and Luminosity**

In astronomy, luminosity is the total amount of energy emitted per unit of time by a star, galaxy, or other astronomical object. As a term for energy emitted per unit time, luminosity is synonymous with power. how to stop emails from automatically deleting on iphone Examples Video A company is making cereal boxes. They need to cover the box in a bright cardboard to make the cereal look appealing. To know how much cardboard they need to make the box, they would have to find the surface area of the box. Imagine that the box has a base area of

**Calculating the Radius of a Star Sloan Digital Sky Survey**

In astronomy, luminosity is the total amount of energy emitted per unit of time by a star, galaxy, or other astronomical object. As a term for energy emitted per unit time, luminosity is synonymous with power. how to tell if pregnant while on birth control Surface Tension. Surface tension is measured as the energy required to increase the surface area of a liquid by a unit of area. The surface tension of a liquid results from an imbalance of intermolecular attractive forces, the cohesive forces between molecules:

## How long can it take?

### Mars Compared to Earth Universe Today

- How do you calculate the radius of a star? Yahoo Answers
- Solutions Size Temperature and Luminosity
- Are all stars the same? (Beginner) Curious About
- 1.Which star has a surface temperature most similar to

## How To Tell If Stars Have Similar Surface Area

Surface tension is the tension of the surface film of a liquid caused by attraction of surface particles by the bulk of the liquid which tends to minimise surface area. Let f be common magnitude of the forces exerted on each other by two parts of surface divided by an imaginary line of length l .

- Once we know the luminosity of the star, we can determine the radius of the star. We see that many stars have very large radii with respect to that of the sun; such stars are called Giant or Supergiant stars (an example is Betelguese which has about 500 times the radius of the Sun).
- 2018-05-14 · To find the area of a circle, start by measuring the distance between the middle of the circle to the edge, which will give you the radius. Then, square the radius and multiply it by pi to find the area. If you need to find the area of a triangle, multiply the base of the triangle by its height. To find the area of a trapezoid, add the top and bottom of the shape together, divide that number
- Once we know the luminosity of the star, we can determine the radius of the star. We see that many stars have very large radii with respect to that of the sun; such stars are called Giant or Supergiant stars (an example is Betelguese which has about 500 times the radius of the Sun).
- H-R Diagram for Stars. A Most Important Diagram Classifying stars according to their spectrum is a very powerful way to begin to understand how they work. As we said last time, the spectral sequence O, B, A, F, G, K, M is a temperature sequence, with the hottest stars being of type O (surface temperatures 30,000-40,000 K), and the coolest stars being of type M (surface temperatures around