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
dybincka [34]
2 years ago
13

An earthworm is slithering on a sidewalk towards a grassy lawn which organelles activity contributes most directly to muscle con

traction in an earthworm
1.golgi bodies
2. Chloroplasts
3.mitochondria
4. Lysosomes
Chemistry
1 answer:
givi [52]2 years ago
5 0

Answer:

3. Mitochondria

Explanation:

Numerous mitochondria are found in each muscle cell to provide metabolic energy for muscle contraction.

hope i helped (:

You might be interested in
6. Which pair of compounds below represents a conjugate acid-base pair?
vova2212 [387]
H2S and HS- are a conjugate acid-base pair.
4 0
3 years ago
Decide if the following is a good, better or poor observation.
Anna71 [15]
The answer to this question I think would be 2: Better
8 0
3 years ago
Amy is asked to determine the chemical composition of an unknown liquid sample. She determines that the sample is negative for p
Dmitry_Shevchenko [17]

Answer:

Amy can apply the Tyndall Beam effect ,by shining a beam of light through the sample solution.

Explanation:

The chemical test for starch is add iodine solution to the tested sample which is yellow/brown and observe the color change to blue/black color. However, the physical test to distinguish simple sugars from starch is the shine a beam of light through the sample solution. Because that sample solution contained no simple sugars, then the presence of starch in the solution will be indicated by dispersal of light because the large starch molecules are enough to affect the light.

3 0
3 years ago
15A.4(a) What is the temperature of a two-level system of energy separation equivalent to 400 cm−1 when the population of the up
maksim [4K]

Answer:

T = 525K    

Explanation:

The temperature of the two-level system can be calculated using the equation of Boltzmann distribution:

\frac{N_{i}}{N} = e^{-\Delta E/kT}  (1)

<em>where Ni: is the number of particles in the state i, N: is the total number of particles, ΔE: is the energy separation between the two levels, k: is the Boltzmann constant, and T: is the temperature of the system </em>         

The energy between the two levels (ΔE) is:

\Delta E = hck    

<em>where h: is the Planck constant, c: is the speed of light and k: is the wavenumber</em>      

\Delta E = 6.63\cdot 10^{-34} J.s \cdot 3\cdot 10^{8}m/s \cdot 4 \cdot 10^{4}m^{-1} = 7.96 \cdot 10^{-21}J  

Solving the equation (1) for T:

T = \frac{-\Delta E}{k \cdot Ln(N_{i}/N)}  

<em>With Ni = N/3 and k = 1.38x10⁻²³ J/K, </em><em>the temperature of the two-level system is:</em><em> </em>

T = \frac{-7.96 \cdot 10^{-21}J}{1.38 \cdot 10^{-23} J/K \cdot Ln(N/3N)} = 525K                                  

I hope it helps you!

3 0
3 years ago
Why does sodium give up an electron?
lidiya [134]
Sodium (Na) has only one electron in its outer electron shell, as shown in Figure 1. Once again, gaining one electron is more energy efficient than losing seven. As a result, it appears to obtain an electron, resulting in an ion with 17 protons, 17 neutrons, and 18 electrons, and a net negative charge (–1).
7 0
3 years ago
Other questions:
  • What is The Domain with four kingdoms or organisms that have cells with nuclei?
    10·1 answer
  • A sample of gas is at 273°K and 2.00 atm with a volume of 6.00 liters. When the gas is compressed to 3.00 liters and the pressur
    7·1 answer
  • Which processes are driven primarily by earths from the sun?
    5·1 answer
  • Clay has a negative charge. What (3) nutrients need by plants have a<br> positive charge?
    7·1 answer
  • What all separation methods are used in food industry ?
    10·1 answer
  • A researcher is using a small molecule as an inhibitor to manipulate a signaling pathway. This inhibitor prevents phosphorylatio
    9·1 answer
  • What type of soil holds the least amount of water
    11·2 answers
  • Hich sentence most accurately describes electrically charged objects?
    10·2 answers
  • 2 C6H14 + 19 O2 --&gt; 12 CO2 + 14 H2O
    6·1 answer
  • 4. How many moles of KBr are found in 3 Liters of 0.4 M solution?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!