How do you do a proper push up and sit-up

Answers

Answer 1

Answer: How to do PUSH UPS:

You put your hands on the floor. Lift your arms repeatedly without using your legs.

How to do SIT UPS:

Sit on the floor. Lay down with your knees up. Get up and down repeatedly without using your waist.

(Hope this helps!! LIKE A BOSS!!!!!!)

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An automatic response to a stimulus is called a reflex.

Answers

If you are asking if it is true or false, the correct answer is true. Reflex is an automatic response to a stimulus. Reflex is a stimulus that will allow an individual to respond to an event in which an organism will need to do in order for survival.

Which of the following is true of salt lakes

Answers

Since you did not give the choices, I'll just have to state what are salt lakes.
A salt lake also known as saline lake, is a landlocked body of water that has a concentration of salts.
These salts are typically sodium chloride and other dissolved minerals significantly higher than most lakes. In some cases, salt lakes have a higher concentration of salt than sea water which are also termed as hypersaline lakes.

Answer is C. The water flowing in to salt lakes contains minerals.

I had it on a test.

When demonstrating the interference of light waves, the dark fringes that appear represent where the waves interfere _________________. A. Constructively
B. Not at all
C. Destructively
D. A little bit

Answers

The dark fringes that appear represent where the waves interfere

C. Destructively

Explanation:

Interference is a phenomenon typical of waves, that occurs when two waves meet at a certain point in space. The amplitude of the resultant wave can be found by using the principle of superposition, which states that the displacement of the resultant wave is the sum of the displacements of each wave. In particular, there are two extreme cases that can occur:

- Constructive interference: this occurs when the two waves meet in phase - i.e., the crest of one wave meets with the crest of the other wave. In this case, the amplitude of the resultant wave is twice the amplitude of each wave.

- Destructive interference: this occurs when two waves meet in anti-phase - i.e, the crest of one wave meets with the trough of the other wave. In this case, the amplitude of the resultant wave is equal to the difference between the two amplitues (and if the two waves have same amplitude, the resultant amplitude will be zero).

This phenomenon can occur also with light wave (which is a type of wave), and it leads to:

- The presence of bright fringes in case of constructive interference

- The presence of dark fringes in case of destructive interference

Therefore, the correct answer is

C. Destructively

Learn more about waves:

brainly.com/question/5354733

brainly.com/question/9077368

#LearnwithBrainly

Answer:

When demonstrating the interference of light waves, the dark fringes that appear represent where the waves are destructively interfere destructively.

Explanation:

The bright lines symbolize constructive interference and some dark lines symbolize destructive interference.

Interference does a phenomenon typical of waves, that occurs during two waves meet at a particular point in space. The amplitude of the resultant wave can do determined by using the system of superposition, which states that the displacement of the resultant wave equals the sum of the displacements of each wave. Inappropriate, two extreme cases can occur:

Constructive interference: that happens when the two waves participate in the state - i.e., the peak of individual waves agrees with each peak of each and every other wave. For this situation, the adequacy of this resultant wave infers double the abundancy from all waves.
Destructive interference: that occurs when two waves joins in anti-phase - i.e, the crest of one wave joins with the through of the other waves. In this case, the amplitude of the resultant wave is equal to the difference between the two amplitudes (and if the two waves have the same amplitude, the resultant amplitude will be zero).
This phenomenon can occur also with lightwave (which is a type of wave), and it leads to:
The presence of bright fringes in case of constructive interference
The presence of dark fringes in case of destructive interference

Therefore the correct answer is option C

To learn more about interface waves, refer:

brainly.com/question/16612684

Predict how heat would flow if beaker A is moved so that it's touching beaker B A. Heat would flow from beaker B to beaker A.
B. No heat flow would take place between the beakers.
C. Heat would flow from both beakers.
D. Heat would flow from beaker A to beaker B.

Answers

Well,

It really depends on thier temperature. But the answer is C) Heat would flow from both beakers.

Write the different between the fall of a parachute on earth and its fall on the moon?on what condition does a body have free fall?

Answers

Answer:

Shown from explanation

Explanation:

You have heard that expression what ever goes up must come down that's usually used to mean when you throw an object up, it comes down on its accord. This is due to a force on the earth that occurs in nature known as gravity.

So when an object falls under this influence it's said to fall freely.

Note not all heavenly bodies have gravitational pull, from experience by scientists who went to the moon they found out whatever goes up keeps flying endlessly so in that case an external force is needed to keep objects in the moon on ground level.

Hence the parachute falls on earth freely without an external force but on the moon it must fall with an external force inputed on the parachute system.

This means in the earth we have free fall but in the moon no such thing exist. So a body falls freely when there is gravity.

If a big person and a small person run up the stairs at the same time who has more force

Answers

Answer:

a big person

Explanation:

because the big person exerts more force over the same distance

Answer:

the big person exerts the largest force on the stairs because he weighs more

Explanation:

this question answer is ☝️☝️

Other Questions

The movement of water is like the flow of the electricity. Electricity must have a complete path for the flow. This movement is called:

Does gravity have an effect on the potential difference of a battery?

Enter the expression 2cos2(θ)−1, where θ is the lowercase Greek letter theta.

Venus's average distance from the sun is 0.72 AU and Saturn's is 9.54 AU. Calculate the orbital velocity of Venus and Saturn around the sun. (The mass of the sun is 1.99 X 10^30 KG. an AU is 1.50 X 10^11 M.