Category: Science Homework Help

I’m working on a physics question and need a sample draft to help me study.

11.One mole of a monatomic gas has initial pressure Pi and volume Vi. The gas
undergoes a process in which the pressure is directly proportional to the
volume until the internal energy of the gas molecules has quadrupled. (I)
Show this process on the PV diagram. (II) What is the final temperature in
terms of the initial temperature? What is the final volume in terms of the
initial volume? (III) How much heat does this process require? Give your
answer in terms of Pi and Vi.

7. (I) Write an equation that describes a transverse wave that is moving to the

-x direction, that has a speed of 20.0 m/s. The y position an element of the

wave is zero at time t = 0 and position x = 0.0m. The maximum transverse

speed and the magnitude of the maximum transverse acceleration of an

element in the medium are 3.0 m/s and 240.0 m/s2. (II) What is the

frequency and wavelength of the waves? (III) What is the velocity of the

element at x = 0.5m and t = 0.2s?

9. You stand in the middle of a basketball court, holding a tuning fork of

frequency f. You now run towards the wall at one side of the court with a

speed vp. (I) What is frequency of beats due to the interference of sound

from the tuning fork itself and those reaching you after reflected from the

wall in front of you? (II) What is the frequency of beats due to the sound

reflected from the wall in front of you and the reflected sound from the

wall behind you? For part (I) & (II), show your answer in terms of speed of

sound v, f, and vw. (III) find the beat frequency in part I & II if you are

running at 5m/s, and the speed of sound is 335 m/s. The tunning fork

frequency is 400Hz. (IV) Based on your results in (III), can you detect both

the beats in part (I) & (II)?

10. You are holding a cosmetic mirror (Not a plane mirror!) in front of your

face. The focal length of the mirror is 15.0cm. Model your eye as a single

converging lens with adjustable focal length. The retina is 2.20cm behind

the lens. (I) What is the focal length of your eye lens such that a clear image

of your eye can be formed on the retina when you are holding the mirror

10.0cm from your face ? (II) Is the image formed on the retina upright, or

inverted? (III) If the vertical dimension of your eye is about 3.0cm, what is

the size of the image of you eye formed on the retina?

I’m working on a chemistry multi-part question and need guidance to help me understand better.

Multi-elemental speciation analysis of organometallic compounds of mercury, lead and tin in two natural waters samples were carried out by headspace-solid phase microextraction followed by GC MS. Read the attached literature (CHM 3430L Lab Unit 3 Assignment 2 Literature.pdf) and watch the instructional videos carefully, and answer the following questions:

1. What is SPME? How is the SPME performed? (4 pts)
2. A buffer with pH 5.3 was prepared by using 0.2 M acetic acid and 0.2 M acetate. How many mL of acetic acid and sodium acetate are required to prepare 100.0 mL of such a buffer. The pKa for acetic acid is 4.76. Show your work. Hint: you will need to set the volume of each as x and y. (8 pts)
3. What fibers were used in SPME? (4 pts)
4. What is the stationary phase for HP-5MS column used in this experiment? Is it polar or nonpolar? (4 pts)
5. Was GC injection a split or splitless one? (2 pts)
6. Was an isothermal program or temperature programming used in GC? Why? (4 pts)
7. What was the mobile phase used? What was the flow rate of the mobile phase? (4 pts)
8. Spike recovery test is an important way to determine if the response to the analysis is decreased or increased by something else in the sample. How was the recovery experiment performed in this literature? (4 pts)
9. What type of method was used in the literature to enhance the extraction efficiency (4 pts)
10. If the organometallic compound has a concentration of 0.5%, what type of injection techniques should be used? (2 pts)

https://youtu.be/Oo7tUoJfY3w

https://youtu.be/OBEQq8NZFeY

1. Consider a typical CR particle at the lower energy limit and the upper energy limit of the measurements shown in Figure 1.8 and compute the following:
   1. 1. the ratio of kinetic to total energy, T/E. Which energy dominates: the kineticenergy or the rest mass energy?
      2. At what kinetic energy is the rest mass energy only 10% of the total energy? Where does this fall in Figure 1.8?
   2. the Lorentz factor, .
   3. the ratio, /c. Over what range of energies are CR particles relativistic?
   4. Estimate the ratio of the number of particles at low energy to the number of particles at high energy. Where do most CRs originate?

   FIGURE 1.8 is attached for reference

*more info can be provided if needed*

The three parts consisting: Introduction, statistics and budget. I am attaching different files which provides all the informations for each section.

Hello, I have biology enzyme lab report that I need help with. I have a copy of the final report from previous semesters but my final report has to be completely different and they can’t look a like at all. If you’d like to work on the lab from scratch, I can provide all resources given by the professor, other than that, I will attach the lab report I currently have along with the rubric.

CH1: The Particles- Macroscopic to Subatomic

question: Repeat Example 1.1 but for a cosmogenic neutrino. Assume isotropy.

here is example 1.1: Estimate the ratio of atmospheric neutrinos to incoming cosmic rays of the same energy.

From Figure 1.10, there is a peak in the curve for atmospheric neutrinos around 108 eV so we will adopt this energy for a comparison with CRs. At higher and lower energies, the number of atmospheric neutrinos declines rapidly (note the logarithmic scale) so this energy should be sufficient for a rough estimate. From the figure, we read that there are ≈10−8 neutrinos eV−1 cm−2 s−1. Conversion to ‘per GeV’ gives us 10 neutrinos GeV−1 cm−2 s−1 and to ‘per square metre’ gives 105 neutrinos GeV−1 m−2 s−1. Atmospheric neutrinos are isotropic since they can pass through the ‘transparent’ Earth. We can therefore divide by 4 (see Appendix B of the online material) to convert to a value per unit solid angle (‘per steradian’) to find ≈8 × 103 neutrinos GeV−1 m−2 s−1 sr−1 . We can now compare this value to CRs as given in the same units in Figure 1.8. At the same energy, there are ≈104 GeV−1 m−2 s−1 sr−1 incoming CRs. Thus, the ratio is close to one as a rough estimate.

*more info can be provided if needed*

The scientific method involves making hypotheses, deriving predictions from them as logical consequences, and then carrying out experiments or empirical observations based on those predictions.

1. Discuss how you feel the scientific method is used in everyday life.

2. Provide at least 2 examples of how you have utilized the scientific method in your personal experience.

the name of the specie is Aflexia rubranura. 

1- Find four high-quality web articles or websites that give information about this specie’ anatomy, physiology, habitat, and interactions with other species in its community. 2- Write notes about what you learn as a bulleted list of phrases that give important information about this species. 3- write the correctly formatted reference for each web source and revise each bulleted list of notes into an annotation.