Homework Help

So i have a homework question regarding the topic "light".Here's the question(Note:This is a three part question and i am only asking the 3rd part,the whole question basically asked me to plot the graph of angle of incidence and refraction when a light ray is shined through air and then liquid(transparent),and predict the angle of refraction with a given number of angle of incidence.) Martin had,on several occasions,accidentally pushed the container containing the liquid medium.As a result,some light was observed to have reflected iff the boundary of the liquid medium instead of passing through it.Martin saw a blur image of himself on the disturbed liquid medium. …

explain the differences in density between the different states of matter in terms of the arrangement pf atoms or moleculeswhat is the difference between specific heat capacity and specific latent heat? thanks

For a density experiment we have to say one reason why the density of water might have been lower at the end of an experiment, one reason why it could be higher and what happened to the density of a substance at end of experiment if the percentage change was a negative number. Do you have any suggestions? I said lower because some of the water may have spilled out during the experiment It could be higher if other materials are inside it Not sure what would have happened to get a percentage of change as a negative number? Any advice would be helpful. Thanks so much !!!

Often times, in biological systems, a phosphate functional group will ionize. Is this group considered acidic or basic? Why? How can the cell compensate for this ionization?

4. Assume that the diploid or 2n number of chromosomes is 18 for a certain species of animal. How many DNA molecules will be found in metaphase II for this species?

Assume that the diploid or 2n number of chromosomes is 18 for a certain species of animal. How many DNA molecules will be found in metaphase II for this species? A 9 B18 C 72 D 24

Hi, i'm in grade and 9 and have to complete this project for my science class. I need help please! I'm given the following to make my egg device: 2 sheets of computer paper, 2m of string, 8 elastic bands, 5 cotton balls, and 30 cm of scotch tape

What makes an autosomal dominant trait to be autosomal dominant?

Hello, could someone explain to me what negative infinity at θ=0 means? Thanks in advance!!!

Hi, My teacher had asked us to solve a question. To introduce cationic vacancies and anionic vacancies in an ionic crystal like MgO. Which would you introduce as substitutional impurities: cations with a higher positive charge or lower positive charge than the cations in the parent structure; or anions with a higher negative charge or lower negative charge than the host anion? Explain your choice. My thought is that for introducing anionic vacancies, we use lower positive charge and for introducing cationic vacancies, we use lower negative charge. However, I do not know the right way to phrase or explain my answer. Can anyone help? Thanks.

Why carbon doesn't share all it's four electrons with one carbon?

i have this 4 Questions that i'll be happy for someone to help me solve them and explain it to me. 1) i got list of this Materials: ,C2H5OH , CBr4 , KBr. and this list of Sentences: -Fluid conductive -Water soluble liquid -solid soluble in cs2 i need to Match sentence to material and to explain this: why does the material soluble in sc2? Write the material reaction in cs2. does the Solution is Leads electricity? does the material at the first Sentences is Water soluble? 2) -i need to explain the Temperature difference between this material: CH3COOH, CH3COCH3, CF4, CH4. -what is the Iso…

i attach here the question and my attempts .. quite confident with Question x, Question y but not Question Z . am not sure if the concept still applies.

Using this info: Blood travels 7.5 cm per beat. In one beat: For .1s, the acceleration is positive 15 m/s^2. It peaks at .75m/s, then there is a negative acceleration (for another .1s) of 5 m/s^2 before stopping at 0m/s. (I am describing a graph here, lol). Using this info, I need to determine "how many beats of the heart it will take the blood to get from your heart to your brain". I have no idea how to do this....no more info was given and I cannot find any info as to distance from heart to brain, etc. online to help me. This is my last resort haha

Hi everybody! I'm in trouble solving this problem:Given an undirected graph G=(N,A), where every vertex is colored with red or blue, and two red vertexes from N are: r and s. 1) We want to verify the existence of a path from r to s containing only red vertexes. Write the pseudo code for an optimal time algorithm. 2) We want to verify in general the existence of a cycle in that graph that contains only red edges. Write the pseudo code for an optimal time algorithm. My solution:I'm not looking for the code but just for any idea for the algorithm. I found a very rough way to verify these conditions so would like to hear your opinion.1) Start from r and keep on visiting…

Hi I'm first year Civil Engineering student, taking a resit in Fluid Mechanics. Our lecturer left us a bunch of revising exercises. I have a problem with one, can anyone help? This lecturer is currently away and doesn't reply to emails. Here's the exercise: A steel pipeline designed to convey oil of relative density 0.8 has an internal diameter of 90cm and an external diameter of 95cm. It is lying on the sea bed, completely immersed and it is anchored at intervals of 8m along its length. Sea water density is 1020kg/m^3 while the density of steel is 7900 kg/m^3. Calculate the largest (the worst case) upward force on each anchor.The given answer is 11.70kN, but I get…

10 i think the answer should be 25 seconds. but the options don't have it.

There is something that I not able to understand about force. I would like to tell it to you with an example. There is a train consisting of 1 engine of 8000kg and 5 wagons of 2000 kg each The acceleration of the train is 2 m/s2 How would you tell what force is exerted by wagon 1 on wagon 2 and why?

Two questions: 1. Calculate the molar enthalpy of neutralization of formic acid, deltaHhcooh+oh. 2. Calculate the molar enthalpy of dissociation of formic acid, deltaHhcooh+h2o. My initial temperature of HCOOH in degrees celsius is 21.9. My initial temperature of NaOH is 20.8. If i calculated my extrapolated final temperature correctly, then it is 26.9. The pH of formic acid solution before the addition of NaOH is 1.88. I calculated the number of moles of H3O+ by using the pH of formic acid, and I got 0.013182567. I don't know how to figure out the initial moles of HCOOH before dissociation, and I need this to determine the number of moles of HCOOH re…

Solve it

I dont know what this is pls help So therse 2 input and one output and if Input 1 is on and input 2 is off the output is on. If there both off output is off if there both on output is off. If input 2 is on and input 1 is off output is off Pls tell me what this is

If a car covers 1/3 of the distance at 20 km/h and rest at 60 km/h, then what is its average speed?

Please explain me the exact mechanism of current flow.

Time taken by sunlight to pass through a window of thickness 4 mm whose refractive index 1.5 is