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
vodka [1.7K]
3 years ago
9

Where does bacteria come from

Physics
2 answers:
wolverine [178]3 years ago
6 0
Bacteria or bacterium comes from cellular mitosis, which is a duplication of single celled organisms
brilliants [131]3 years ago
4 0

Answer:

Fugis

Explanation:

dsd

You might be interested in
The world's largest tires have a mass of 6000 kg
nikitadnepr [17]
Okay!  Thank you for this knowledge
8 0
3 years ago
The work done by the brakes during braking is equal to
kow [346]

Answer:

The amount of pressure delivered to them

Explanation:

6 0
2 years ago
Is the Force balanced or unbalanced?
Alexus [3.1K]

Answer:

1. balanced

2. unbalanced

3. balanced

4. balanced

5. unbalanced

6. unbalanced

7. unbalanced

8. balanced

9. unbalanced

10. unbalanced

11. unbalanced

12. balanced

3 0
3 years ago
How much heat must be removed
Cerrena [4.2K]

Answer:95400

Explanation:

5 0
2 years ago
Read 2 more answers
Steel train rails are laid in 12.0-m-long segments placed end to end. The rails are laid on a winter day when their temperature
Yanka [14]

Answer:

a) Space = 6.05 x 10^{-3} m = 0.605 cm

b) Stress= -100.8 x 10^{6} Pa

Explanation:

<em>1) Data Given</em>

L = 12 m , T_i = -9 C \degree, T_f = 33 C \degree

<em>2) Calculate the space using Linear thermal expansion formula</em>

We need to use Linear thermal expansion formula since the space created would be a change on 1 dimension, the increase of the temperature will increase the length of the steel.  The formula is given by:

\Delta L = L_i \alpha_{steel} \Delta T

We have everything except the \alpha_{steel} , so we look for this on a book and we find that \alpha_{steel} = 1.2 x 10^{-5} C^{-1}, so we can replace.

\Delta L = 12 m (1.2 x 10^{-5} C^{-1}) (33 C \degree -(-9 C \degree)) = 12 m (1.2 x 10^{-5} C^{-1}) 42 C \degree =6.048 x 10^{-3} m = 0.6048cm

<em>3) Calculate the stress of the steel </em>

The Stress is the ratio of applied force F to a cross section area - defined as

\sigma = \frac{F_n}{A}

Since we don't have the force and the Area, we need to look for another way to find the stress.

For this we can use the concept called Young's Modulus, defined as : "the mechanical property that measures the stiffness of a solid material", and the formula for this is given by:

Y =\frac{F L}{A \Delta L} (1)

Solving \frac{F}{A} from the previous formula we have this:

\frac{F}{A}  = (Y  Δ L)/L  (2)

From the <em>Linear thermal expansion formula</em> we can solve like this

\frac{\Delta L}{L} =  α  ΔT  (3)

And replacing equation (3) into equation (2) we have:

\frac{F}{A}  = Y α ΔT (4)

We have that the Young's Modulus for the steel is 20x10^{10} Pa, so replacing into equation (4)

\frac{F}{A} = 20x10^{10} Pa (1.2x10^-5 C^-1) (42C) = 100.8 *10^{6} Pa  

That represent the absolute value for the Stress, the sign on this case would be negative since there is a compression.

3 0
3 years ago
Other questions:
  • If the temperature of a liquid increases, the density of the liquid decreases because the particles move farther apart. What are
    11·1 answer
  • The magnetic dipole moment of Earth has magnitude 8.00 1022 J/T.Assume that this is produced by charges flowing in Earth’s molte
    13·1 answer
  • The mass m1 enters from the left with velocity v0 and strikes a mass m2 &gt; m1 which is initially at rest. The collision betwee
    6·1 answer
  • An electron is released a short distance above earth's surface. a second electron directly below it exerts an electrostatic forc
    11·1 answer
  • Sharks and related fish can sense the extremely weak electric fields emitted by their prey in the surrounding waters. These dete
    11·1 answer
  • Be sure to answer all parts. Assume the diameter of a neutral helium atom is 1.40 × 102 pm. Suppose that we could line up helium
    9·1 answer
  • During one year a population of blue jays has zero population growth. which must be true about the blue jay population at the en
    10·2 answers
  • There is no air in space astronauts in space cannot hear sounds from outside their spacesuits explain this
    12·1 answer
  • HELP PLEASE!
    14·1 answer
  • Hi guys can you help me with finding advantages with nuclear power?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!