A good sign that cardiovascular exercise is occurring is that you _____.

Answers

Answer 1
Answer:

Answer: are breathing much faster

Explanation:

Exercise is a physical activity which increases the rate of respiratory and cardiovascular activity of the body. The cardiovascular exercise is likely to increase the rate at which the heart pumps blood as the body faces the scarcity of oxygen in the muscles which conducts the exercise. This increases rate of breathing so as to acquire more amount of oxygen. The oxygenated blood is pumped by the heart to all the parts of the body.

Answer 2
Answer: Are breathing hard. This is because cardiovascular exercise makes the heart beat faster which in turn creates a need for more air.

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The hottest objects with temperatures in the millions of Kelvins, give off most of their radiation in which part of the electromagnetic spectrum? The hottest objects with temperatures in the millions of Kelvins, give off most of their radiation in which part of the electromagnetic spectrum? radio visible X-ray gamma ray ultraviolet

Answers

Answer:

The hottest objects with temperatures in the millions of Kelvins, give off most of their radiation in the form of X-rays and gamma rays.

Explanation:

The electromagnetic (EM) spectrum contains radio waves, microwaves, infrared light, visible light, ultraviolet light, X-rays and gamma-rays. All these different types of radiation are made up of photons having specific wavelengths and different amounts of energy. In the EM spectrum, the photons of radio waves have the lowest energy and the energy of photons increases through microwaves, infrared, visible light, ultraviolet, X-rays, and the photons of gamma-rays have the highest energy (the energy of photons is measured in electron volts).

All warmer objects such as stars, planets, etc emit photons having a specific range of wavelengths and it depends on the surface temperature of those objects. The very hot objects with temperatures in the millions of Kelvins or more mainly emit photons with shorter wavelengths, such as gamma rays and X-rays while cooler objects emit radiation such as infrared or radio waves, having longer wavelengths.

The ultraviolet radiation has the energy in the range of a few electron volts to about 100 eV. The energy of X-ray photons is in the range of 100 eV to 100 keV and the energy of gamma-rays is greater than 100 keV. The nuclear explosions, radioactive decay, the hottest and most energetic objects in the universe such as neutron stars, supernova explosions, etc produce gamma rays.

Objects with temperatures in the millions of Kelvins emit most of their radiation in the X-ray and gamma-ray parts of the electromagnetic spectrum.

Objects with temperatures in the millions of Kelvins primarily give off most of their radiation in the X-ray and gamma-ray parts of the electromagnetic spectrum. As an object's temperature increases, the wavelengths of radiation it emits become shorter. This phenomenon is described by Wien's displacement law.

At lower temperatures, such as those found on Earth or in stars like our Sun, objects emit most of their radiation in the visible and infrared parts of the spectrum. However, as temperatures rise to millions of Kelvins, the emitted radiation shifts to shorter wavelengths, eventually falling into the X-ray and gamma-ray regions.

In the X-ray and gamma-ray parts of the electromagnetic spectrum, radiation has extremely high energy and short wavelengths. These types of radiation are associated with the very high temperatures and intense energy found in extremely hot objects, such as the cores of massive stars, supernovae, and certain high-energy astrophysical phenomena. Scientists use X-ray and gamma-ray telescopes to study these extreme environments and the radiation they emit.

Learn more about Electromagnetic Spectrum here:

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I need help please! It's for a class I'm failing!You exert 375 J to move a 45-kg object 5 m. How much force is required?
a. 1,875N
b. 75N
c. 420N
d. 225N

Answers


Here's the formula you need to remember:

                        Work = (force) x (distance)

That's it.  It's so short and simple that you didn't pay much attention
to it when it came around the first time.  I KNOW it's in your notes,
maybe several pages back.  Now, you should memorize it, before
it gets away from you again.

                          Work = (force) x (distance).

Say it with me:   "Werk eekwals forss timez distanss". 

Now that you have that tool in your toolbox, we can go on
and look at the question.

This question is not easy, and when I read it carefully, I DON't
think that's because there's a lot of Physics hidden in it.  I think
it's because whoever wrote the question was unclear on some
of the concepts, and wrote a poor question.

The question DOESN't tell you what direction I moved the 45-kg
object.  Did I slide it across the floor, or did I lift it straight up ?

Now I'm thinking about it some more, and I changed my mind.
NOW I think the question was written by a person who made it
very sneaky, to see if we know what we're doing.

Close your eyes and tell me the formula for work that we just
memorized. . . . . . Very Good !   Work = (force) times (distance).

From the question, we know the work, and we know the distance.

                                                     375 J                      = (force) x (5 meters)

Divide each side by (5 meters):   (375 J) / (5 meters) = Force

                                                          Force = 75 newtons

That bit about "45 kg" is just there to confuse us.  We don't care
WHAT the mass of the object is.  We don't need it to answer the
question, and we don't need to know it.  I almost got sucked in,
and I was trying to take you down with me.

All we need to know is:      Work = (force) times (distance) .

Is it true or false that wave interference only occurs with transverse waves?

Answers

i am not 100% sure but i think it is true.

Which one of the following parenting factors is associated with improved IQ scores in children? A. Strict discipline
B. Lenient discipline and fewer rules
C. A stable home and varied activities
D. Early instruction in reading

Answers

Answer: Option (C) is the correct answer.

Explanation:

The term IQ stands form intelligent quotient. When a child is provided with stable home environment in which there are less or rare conflicts, happy environment, understanding between individuals etc will lead to a stable growth of child.

Also, varied activities will help child to learn quickly and develop various skills.

Thus, a stable home and varied activities is the one parenting factor which is associated with improved IQ scores in children.

The correct answer is C. A stable home and varied activities.

Hope this helps! xoxo

Two waves are superposed. One wave has an amplitude of 3 cm, and the other has an amplitude of 4 cm. What is the resultant amplitude?

Answers

Superposition is a principle in physics. Applied to waves, it states that the amplitude of two superposed waves is the sum of the amplitudes of the two individual waves. Then the resultant amplitude of these two waves is 4 cm + 3 cm = 7 cm.

Answer:

7 cm

Explanation:

Why did most scientist reject wegeners theory for nearly a half century

Answers

He couldn't provide as much satisfactory explaining for the force that pushes or pulls the continents also because it contradicted their ideas about how mountains form.
I think they were also too skeptic to believe the ocean did move or pull apart, even today do you believe that the continents broke from one big flat plate, and that they pulled apart? They also wonder what large force would be responsible for the movement.

It was much later that evidences from plant and animal features that had similarity from two different planets came up that scientists began accepting the idea of continental drift.
And similar rock strata from two different opposite continents, showed similar rock strata.
All these evidences came up much later after Alfred Wengener.

So Alfred Wengener was honored Posthumously.