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
____ [38]
3 years ago
12

A steel block has a volume of 0.08 m³ and a density of 7,840 kg/m³. What is the force of gravity acting on the block (the weight

) in water?
Physics
2 answers:
Blababa [14]3 years ago
3 0
d=\frac{m}{V}\\
\\
0.08 = \frac{m}{7,840}\rightarrow m=0.08 * 7,840=627.2 \ kg

\vec{F_g}=m.\vec{g}=627.2 *9.8=6,146.56 \ N
Anni [7]3 years ago
3 0
Density = 7840 kg per m³
Volume = 0.08 m³
Mass = 0.08 of 7840 kg = 627.2 kg

Now I'm going to give you the correct answer to your question, and then,
after that, I'm also going to give you the answer you expect.

The correct answer is:  (Ryan2 the Expert in Answer #1 is correct) . . . . .

The force of gravity on a mass doesn't depend on what it's sunk in, surrounded by,
hanging from, or resting on.  As long as it's on or near the Earth's surface, the force
of gravity acting on it is the same, no matter what else is around.

Force of gravity (weight) = (mass) x (gravity) = 627.2 kg x 9.8 m/s² = 6146.56 newtons
=============================================

The apparent weight is less, because when it's immersed in a fluid, there's
a buoyant force acting on it, which cancels part of the force of gravity.

The buoyant force = weight of the displaced water.

Assume the density of water is 1 kg per liter = 1,000 kg per m³.

Then the weight of 0.08 m³ of water is (80 kg x 9.8 m/s²) = 784 newtons.

This is the upward buoyant force on the steel when it's in water,
and it makes the steel seem 784 newtons lighter in water.  So the
apparent weight of the steel in water is

6146.56 minus 784 = 5362.56 newtons.

That's why you can pick up your big brother in the swimming pool.
The force of gravity on him doesn't change, but the buoyant force
in the water balances part of the force of gravity, and makes him
seem to weigh less.

If he could blow himself up like a balloon, and displace enough water
to weigh just as much as he really does, then the buoyant force would
cancel his weight completely, and he would totally float !

That's how steel ships float in water.  They're shaped in a shape that can
displace a lot of water.  The whole secret is in the shape.
You might be interested in
Please answer all of them <br>I'll give brainly if answer for points will be reported ​
enyata [817]

Answer:

Level 1-

1. It depends of the sense and the magnitude of the force

2. Electric force

3. A contact force need to touch to act in the object, like push a box for example. A non-contact force don't need to touch to act in the object, like an magnet attracting other magnet

4. The pressure is the force divided by the area. The unit for pressure in the international system is Pascal

5. Because the pressure is applied in all the surface of our bodies, so the force is divided by the surface area of our bodies.

Level 2-

1. The balloons stick to the walls because when she rubbed they in her clothes they earned eletric charge, and when they touched the wall, the electric charges of the wall got polarized and it creats a attraction force.

The same happened with the water stream. The balloons were charged with electric charges and the water was attracted by it.

2. Mass is the amount of matter, it's an scalar quantity. Weight is the force created by the attraction of a massive body as the Earth, and another body as a human, and a force is a vector

3. It's for increase the surface area, so the pressure will be decreased

4. When a person pulls up the syringe plunger the pressure inside the syringe is smaller than the pressure outside, so the pressure push the liquid into the syringe

5. a) The stream of the top is falling closer than the stream from the bottom, causa in the top the pressure is lower than in the bottom. In the bottom, beyond the air pressure, it has also the whole column of water making more pressure, so it goes far.

b) The streams are all near because the holes are in the same height, so the pressure is divided for all the holes.

Level 3-

1. The girl.

pressure of the girl: 50/1 = 50

pressure of the man: 100/25 = 4

pressure of the elephant: 4500/250 = 18

So, the girl exerts more pressure.

2. When the can is heated the air inside expands and get out of it. If you seal the mouth of the can, the air cannot return to inside it, and when it get colder the air inside will shrink back to the normal volume, so it will occupy less space and the outside pressure will exerts a force and deform the can.

4 0
2 years ago
A. It decreases gradually. B. It increases gradually. C. It falls sharply. D. It remains the same.
harina [27]

Answer:

It remains the same.

Explanation:

» At 100°C, it is the boiling point of water. And it starts changing from liquid state to gaseous state

{}

3 0
2 years ago
Read 2 more answers
Nervous tissue is made up of neuroglia and what other type of cell?
anyanavicka [17]

Nervous tissue is composed of neurons and supporting cells called neuroglia, or ” glial cells.” . Neurons are the other the other type of cell that comprise nervous tissue. Neurons have cell bodies, dendrites, and axons.

5 0
3 years ago
How many 176 ohm resistors are connected in series to get a current of 5 a on 220 v battey
Phantasy [73]
Total resistance = voltage / current = 220 / 5 = 44 ohms .

Even one 176-ohm resistor is too much.  The current through it is 1.25 A,
and more than one of them in series reduces the current even further.

Connecting them in <em><u>parallel</u></em>, however . . .

Four resistors of 176-ohms each, in <u>parallel</u>, have a net effective resistance
of 176/4 = 44 ohms ... exactly what you need to do the job.

4 0
3 years ago
Un tanque cilíndrico de Gasolina tiene 3 metros de longitud y 1.2 metros de diametro y la densidad es igual a 680 kg/m3
aniked [119]

Answer:

2310kg

Explanation:

5 0
3 years ago
Other questions:
  • What is the frequency of a wave having a period equal to 18 seconds
    5·2 answers
  • An initially motionless test car is accelerated uniformly to 115 km/h in 8.83 seconds before striking a simulated deer. The car
    8·1 answer
  • Feces is usually about 40 percent water and 60 percent solid matter. Reducing the water content to 20 percent would most likely
    10·1 answer
  • What are many scientific laws represented with?
    15·1 answer
  • Why do you think it might be useful to know the distance between a gun fired and it's target?
    10·2 answers
  • If the half-life of a decaying isotope is 10 years, which statement is true after<br> 10 years?
    13·1 answer
  • Physics help PLEASE 50 points + brainliest for the right answer
    11·1 answer
  • If Calcium has 2 valence electrons and Chlorine has 7 valence electrons, how many Cl-1 ions would need to combine with 1 Ca+2 io
    9·1 answer
  • That is a difference between a law and a hypothesis?
    8·1 answer
  • Một vật dao động điều hòa có phương trình là x = 4sin(πt + π/3) (cm; s). Lúc t = 0,5s vật có li độ và vận tốc là
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!