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
ch4aika [34]
3 years ago
12

Anita holds her physics textbook and complains that it is too heavy. Andrew says that her hand should exert no force on the book

because the atmosphere pushes up on it and balances the downward pull of Earth on the book (the book's weight). Jim disagrees. He says that the atmosphere presses down on things and that is why they feel heavy. Approximately how large is the force that the atmosphere exerts on the bottom of the book? Suppose that the dimensions of the book are 0.22 m times 0.28m, the mass of the book is 3 kg and pressure is 1.0 times 10^5 N/m^2.

Physics
2 answers:
guajiro [1.7K]3 years ago
7 0

The force that the atmosphere exerts on the bottom of the book is about 6160 Newton

\texttt{ }

<h3>Further explanation</h3>

The basic formula of pressure that needs to be recalled is:

Pressure = Force / Cross-sectional Area

or symbolized:

\large {\boxed {P = F \div A} }

<em>P = Pressure (Pa)</em>

<em>F = Force (N)</em>

<em>A = Cross-sectional Area (m²)</em>

Let us now tackle the problem !

\texttt{ }

<u>Given:</u>

Area of the book = A = 0.22 × 0.28 = 0.0616 m²

Mass of the book = m = 3 kg

Atmospheric Pressure = P = 1.0 × 10⁵ N/m²

<u>Asked:</u>

Force on the bottom of the book = F = ?

<u>Solution:</u>

P = F \div A

F = P \times A

F = 1.0 \times 10^5 \times 0.0616

F = 6160 \texttt{ Newton}

\texttt{ }

<em>The force that the atmosphere exerts on the bottom of the book is approximately equal to the force that the atmosphere exerts on the top of the book. Therefore these forces will be cancel out. If Anita holds the book , she only has to exert force equal to the weight of the book.</em>

\texttt{ }

<h3>Learn more</h3>
  • Minimum Coefficient of Static Friction : brainly.com/question/5884009
  • The Pressure In A Sealed Plastic Container : brainly.com/question/10209135
  • Effect of Earth’s Gravity on Objects : brainly.com/question/8844454

\texttt{ }

<h3>Answer details</h3>

Grade: High School

Subject: Physics

Chapter: Pressure

Nady [450]3 years ago
5 0

Answer:

The force exerted is 6189.4 N

Solution:

As per the question:

Area of the book, A = 0.22\times 0.28 = 0.0616\ m^{2}

Mass of the book, m = 3 kg

Pressure of the book, P = 1.0\times10^{5}\ N/m^{2}

Now,

Pressure, P = \frac{F}{A}

Force, F = PA = 1.0\times10^{5}\times 0.0616 = 6160\ N

Force on mass of 3 kg, F' = mg = 3\times 9.8 = 29.4\ N

Now, the force at the bottom is given by:

F'' = F + F' = 6160 + 29.4 = 6189.4 N

You might be interested in
A support crossbeam on a high speed train is made from a titanium rod that has a length of 0.650m when measured by an observer o
Vilka [71]

Answer:

A) The crossbeam is moving relative to the observer on the platform so the height appears contracted.

Explanation:

The observer on the train and the beam are in the same reference frame. That means observer on the train will measure the proper length of the beam not the contracted length . the observer is outside and the plank is in the moving system,it will appear to be moving.

3 0
3 years ago
HELP!!!
Vitek1552 [10]
We shall consider two properties:
1. Temperature difference
2. Thermal conductivity of the material

Use a cylindrical rod of a given material (say steel) which is insulated around its circumference.

One end of the rod is dipped in a large reservoir of water at 100 deg.C and the other end is dipped in water (with known volume) at 40 deg. C. The cold water if stored in a cylinder which is insulated on all sides. A thermometer reads the temperature of the cold water as a function of time.

This experiment will show that
(a) heat flows from a region of high temperature to a region of lower temperature.
(b) The thermal energy of a body increases when heat is added to it, and its temperature will rise.
(c) The thermal conductivity of water determines how quickly its temperature will rise. If mercury replaces water in the cold cylinder, its temperature will rise at a different rate because its thermal conductivity is different.



5 0
3 years ago
Read 2 more answers
When must a psychological researcher debrief human test subjects?
myrzilka [38]
<span>Psychological researchers must debrief human test subjects </span><span>at the end of every experiment.

The current code of ethics in p</span>sychological research states that researchers absolutely must debrief human test subjects at the end of every study regardless or whether or not harm or deception was involved.

Debriefing a subject after a study is an essential opportunity for the researcher to explain the purpose and aim of the study to the subject, make sure the subject is not harmed or mentally disturbed, clarify why deception was used (if deception was involved) and overall, to clarify any questions or doubts the subject might have.
3 0
3 years ago
What are tiny sacs at the end of the bronchioles filled with air called?
WARRIOR [948]

Answer:

Alveoli

The bronchioles end in tiny air sacs called alveoli, where oxygen is transferred from the inhaled air to the blood.

Hope this helps :)

7 0
3 years ago
Which activity is the best example of cardiovascular and strength training exercises work together
Nataly [62]

it got to be jumping jacks that all i got

4 0
3 years ago
Read 2 more answers
Other questions:
  • A cylinder with moment of inertia I about its center of mass, mass m, and radius r has a string wrapped around it which is tied
    5·1 answer
  • A boy on the beach holds a spherical balloon filled with air. at 10:00am, the temperature on the beach is 20°c and the balloon h
    13·1 answer
  • A missile is moving 1350 m/s at a 25° angle it needs to hit a target 23,500 m away in a 55° direction in 10.2 seconds what is th
    14·1 answer
  • 2NaOH + H2SO4 → Na2SO4 + H2O
    7·2 answers
  • Which image represents two equal displacements?
    14·1 answer
  • Philip was diagnosed with __________ vestibular disorder, which is a dysfunction of the nervous system that processes balance. A
    10·2 answers
  • If you push on a heavy box that is at rest, you must exert some force to start its motion. 5. however, once the box is in motion
    10·1 answer
  • If you need a routine health checkup, which facility is most cost-effective?
    15·2 answers
  • An insect 5.00 mm tall is placed 20.0 cm to the left of a thin planoconvex lens. The left surface of this lens is flat, the righ
    13·1 answer
  • Ure
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!