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3 years ago

Which is the main difference between cardio and strength training activities

Physics

1 answer:

Mekhanik [1.2K]3 years ago

5 0

Cardio strengthens the circulatory system while strength training strengthens muscles and boost anaerobic endurance.

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5. How much time does it take for a bird flying at a speed of 45 kilometers per hour to travel a

Lyrx [107]

Answer:

$40h$

Explanation:

Use the velocity formula to solve

$v = \frac{d}{t}$

In this question, you are given velocity $v = 45km/h$ , and you are given a distance, $d = 1800km$ . Time in this question is what you'll need to find.

Start by rearranging the velocity formula, to isolate for t.

$v = \frac{d}{t}$

Start by multiplying both sides by t

$v(t) = \frac{d}{t}(t)\\\\vt = d$

Then divide both sides by v.

$vt\frac{1}{v} = d/v\\ \\t = \frac{d}{v}$

Now that you've isolated for time, sub in your values and calculate.

$t = \frac{d}{v} = \frac{1800km}{45km/h} = 40 h$

8 0

2 years ago

Which light packs the highest energy per photon? 1. infrared 2. red 3. blue 4. ultraviolet 5. green?

WINSTONCH [101]

A single photon carries an energy equal to
$E=hf$
where h is the Planck's constant and f is the frequency of the photon.
This means that the higher the frequency of the light, the higher the energy. Among the 5 different options mentioned by the problem, the light with highest frequency is ultraviolet, which has frequencies in the range [3-30] PHz, while visible light (red, blue, green) and infrared have lower frequency, so ultraviolet light has the highest energy per photon.

3 0

3 years ago

Models are particularly useful in relativity and quantum mechanics, where conditions are outside those normally encountered by h

mylen [45]

Answer:

A model is defined as a structure used to represent an object, usually of a different scale.

Explanation:

In quantum mechanics and particle physics, many of the particles are subatomic, meaning that they are smaller than atoms. This is where a model would be useful. A model could help people to visualise what the particle looks like, and in general would make it easier to understand the behaviour of such a particle.

4 0

2 years ago

The fraction of the total radiation that is reflected by any surface is called its _____.

Vadim26 [7]

Answer: D. Albedo

Explanation:

The proportion of total light incident on surface that is reflected back is called its albedo. These are typical features of an astronomical body. It is a dimension less quantity and its value ranges from 0 to 1. Light surfaces reflect larger amount of light than dark surfaces. This feature can be clearly seen on planet Mars and the Moon.

Thus, the fraction of the total radiation that is reflected by any surface is called its <u>Albedo.</u>

8 0

3 years ago

Read 2 more answers

What’s the answer? Will give brainliest

Stella [2.4K]

Answer:

The answer to your question is: letter D

Explanation:

Fussion: means combine 2 light nucleus to form heavier nucleus.

Fission: means splitting heavy nucleus to form lighter nucleus.

In the figure we can see two light nucleus that combine to form heavier nucleus, so the answer is nuclear fussion.