What unit of length is used to express the size of stars?

Answers

Answer 1

Answer:
The size (radius, diameter) of stars is typically described
in terms of miles or kilometers.

The mass and volume of stars are described in kilograms and
cubic meters respectively, with scientific notation for the huge numbers.

Answer 2

Answer: Because the distances to stars are so large, it is useful to introduce some large ... The Light Year Distance Unit ... of 3 x 1010 cm/s in a vacuum, we can determine the length of a light year in centimeters

Related Questions

The mass is 2.0 kg. If the net force is 20.0 N, what is the acceleration?
Which statement best compares the accelerations of two objects in free fall? A) The heavier object has a greater acceleration. B) The object that has the greater surface area has the lower acceleration C) The object that has the smaller mass has the greater acceleration D) The objects have the same acceleration
Which of the following is not one of da Vinci's contributions to technology?a. effect of the moon on tides b. modern theory on the formations of the continents c. precise observations of human anatomy d. ideas for space travel
Which of the following occurs when the fight-or-flight response is triggered?
A car climbs 10.0 kilometers up a hill that inclines 8.0 degrees. What is the car's vertical displacement?

Why does a moving object come to a stop on a frictional surface? a.The object’s kinetic energy is transformed into mainly heat energy. b.The object’s potential energy is transformed into mainly kinetic energy. c.The object loses all its energy in deformation. d.The object’s kinetic energy is transformed into mainly potential energy.

Answers

The correct answer to the question is - A) Object's kinetic energy is transformed into mainly heat energy.

EXPLANATION:

The friction is the opposing force which acts tangentially between two surfaces when there is a relative velocity between them.

As per the question, the moving object comes to rest after the application of frictional force.

Initially the object is in motion.Hence, the energy possessed by the moving object is kinetic energy.

When frictional force is applied on the moving object, the kinetic energy of the moving object will be converted into mainly heat energy. It is due to the fact that friction causes heat production between two surfaces in contact.

Hence, correct option will be that the object's kinetic energy is transformed into mainly heat energy.

A) the objects kinetic energy is transformed into mainly heat energy

That "heat energy" is called fricton

When Earth and the Moon are separated by adistance of 3.84 × 10^8 meters, the magnitude of
the gravitational force of attraction between
them is 2.0 × 10^20 newtons. What would be the
magnitude of this gravitational force of attraction
if Earth and the Moon were separated by a
distance of 1.92 × 10^8 meters?
(1) 5.0 × 10^19 N (3) 4.0 × 10^20 N
(2) 2.0 × 10^20 N (4) 8.0 × 10^20 N

Answers

Using the Universal Gratitation Law, we have:

$F= (MmG)/(d^2) \n MmG=2*10^(20)*(3.84*10^8)^2 \n MmG=29.4912*10^36$

Again applying the formula in the new situation, comes:

$F= (MmG)/(d^2) \n F= (29.4912*10^36)/((1.92*10^8)^2) \n \boxed {F=8*10^(20)}$

Number 4

If you notice any mistake in my english, please let me know, because i am not native.

The strength of the gravitational forces between two masses is
inversely proportional to the square of the distance between them.

So if you change the distance to

   (1.92 x 10⁸) / (3.84 x 10⁸) = 1/2

of what it is now, then you would change the force to

   1 / (1/2)² = 4

of what it is now.

   (4) x (2 x 10²⁰) = 8.0 x 10²⁰ newtons .

What determines the atomic mass of an element? A.
the sum of the neutrons and the electrons

B.
the sum of the protons and electrons

C.
the sum of the ions and isotopes

D.
the sum of the protons and the neutrons

Answers

D. protons + neutrons. Electrons have relatively small mass compared to them.

Can you help me with this pls

Answers

Answer:

Can you help me with this pls

Assuming 70% of Earth's surface is covered in water at an average depth of 2.5 mi, estimate the mass of the water on Earth in Kilograms.

Answers

This is an excellent question that i do not have the answer to.

The state of matter with a specific volume but no definite shape is the _____ state. plasma
gas
liquid
solid

Answers

Answer

Liquid

Explanation

There are four states of matter. Gas, liquids, plasma and solids.

Solids has a definite shape.

Gas and plasma has no definite volume.

Liquids are made up of very small vibrating particles called molecules that are held together by intermolecular forces. This makes the liquid to have a definite volume and no definite shape.

Liquids are ideally incompressible, so their volume barely changes. They also adapt to whichever shape.

liquid

Other Questions

A constant net force acts on an object. which of the following best describes the object's motion?

We spend our lives in visible light without risks to our health. Yet exposure to UV waves in sunlight can cause skin cancer. What is the BEST explanation for this?A) UV waves are longer and carry more energy. B) UV waves are higher frequency and carry more energy. C) UV waves have a lower frequency and carry more energy. D) UV waves travel faster than visible light and have more energy.

All life that we know of is based on carbon. Carbon's ability to form many chemical bonds is an important characteristic that allows it to form the basis of life. Identify two other elements that can probably also form a large number of bonds and that probably have similar properties to carbon.

Which of the following is not a type of pulley systemA fixed B movable C combination D advantageous