1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Marta_Voda [28]
3 years ago
7

You have probably noticed that carrying a person in a pool of water is much easier than carrying a person through air. To unders

tand why, find the buoyant force exerted by air and by water on the person. Assume the average volume of a person is 0.092 m3, and that the person is submerged in air and water respectively. (Give the magnitude.)
air: ________
water :_______
Physics
1 answer:
Kruka [31]3 years ago
6 0

Answer:

The answer is "0.91238 and 744.8"

Explanation:

In this scenario it is easier to take a person to the water-pool than to transport the people in the air, as the person's strength is increased by water upwards:

f_b \to m \to mg =person \\\\F_B \ in\  air = v\ & air\  g \\\\

               =0.076 \times 1.225 \times 9.8 \\\\ =0.91238 \ N\\\\

F_B \ in \ water = v  \& water \ g \\\\

                    =0.076 \times 1000 \times 9.8\\\\= 744.8 \ N\\

You might be interested in
How can spectroscopy and infrared technology be useful in space?
olchik [2.2K]

Answer:

B

Explanation:

Spectroscopy measures electromagnetic radiation.

3 0
3 years ago
Need an answer, please need an answer, please​
Karolina [17]

9514 1404 393

Answer:

  • moderate low: 82
  • moderate high: 112.75
  • vigorous low: 123
  • vigorous high: 174.25

Explanation:

When calculations are repetitive, I find it convenient to use a calculator that can work with tables.

The PMHR is (220 -15) = 205.

Each of the other heart rates is computed as the formula shows. For example, the low moderate heart rate is 205×0.40 = <u> 82 </u> bpm

The other rates are shown in the attached table. They are computed the same way.

6 0
3 years ago
Which friction-reducing technologies are used in the Variable Compression Turbo Engine?
Grace [21]

Friction-reducing technologies used in the Variable Compression Turbo Engine are Diamond-like coating on valve lifters, micro finishing on crankshaft and camshaft and mirror bore coating on cylinder wall.

<u>Explanation:</u>

Variable compression is a technology to adjust the compression of an internal combustion engine while the engine is in operation. At this time friction may occur that need to be reduced. To reduce this friction some technologies are used like

  • Diamond-like coating on valve lifters
  • Micro finishing on crankshaft and camshaft
  • Mirror bore coating on cylinder wall

A hydrogen free diamond like carbon coating is applied to an engine valve lifter to reduce mechanical loss. Micro finishing on crankshaft and camshaft achieves improvement in geometric parameters such as roundness. Mirror bore coating on cylinder wall raises energy efficiency by reducing the friction inside the engine.

4 0
3 years ago
If the real gi tract is 9 meters long, the model you created is what fraction of the real one
Sedbober [7]

Answer:

a

Explanation:

a

7 0
3 years ago
What’s parts are needed to make a circuit
tekilochka [14]

Answer:

Every electric circuit, regardless of where it is or how large or small it is, has four basic parts: an energy source (AC or DC), a conductor (wire), an electrical load (device), and at least one controller (switch). Visualize what happens when you switch on a room light. You toggle or push a switch to "turn on" the light.

Explanation:

I hope this helps !!!!

6 0
3 years ago
Other questions:
  • To practice Problem-Solving Strategy 15.1 Mechanical Waves. Waves on a string are described by the following general equation y(
    7·1 answer
  • On the planet Gizmo, the inhabitants travel by high speed trains that run on air tracks much like the air track you used in lab.
    9·1 answer
  • What is the temperature inside of a tree?
    15·1 answer
  • At room​ temperature, glass used in windows actually has some properties of a liquid. it has a very​ slow, viscous flow.​ (visco
    14·1 answer
  • At t = 0, object A is dropped from the roof of a building. At the same instant, object B is dropped from a window 10 m below the
    11·1 answer
  • Why it is easier to remove a 2p electron from an oxygen atom than from a nitrogen atom?
    9·1 answer
  • A rubber ball thrown at a speed of 5 m/s hit a flat wall and
    14·1 answer
  • How are electromagnetic waves used in the military?
    15·1 answer
  • Miswer
    12·1 answer
  • PLEASE read this carefully.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!