A bar of length ℓ lies on the ?̂-axis with its center at the origin. A proton sits on the ?̂-axis, a height of ℎ above the center of the bar. The bar carries a total charge of ?, which is distributed uniformly along its area.

a. Find the electric field vector experienced by the proton. I ask that you do solve this integral, though you may use any means necessary to do so (yes, including WolframAlpha).

b. Find the electric field vector experienced by the proton if the bar is infinitely long (but still “centered” on the origin).

Explain how research may be finding risks in sport when many used to think that sport enhanced health.

Compare some of the health benefits and risks to participating in sports.

1. Compound A is three times more soluble in diethyl ether than in water, so its partition coefficient is K = 3, for partitioning of compound A between diethyl ether and water. For a sample of compound A dissolved in 50 mL of water, answer the following questions:

A.) Determine the fraction of A that remains in the water, FsubA, after one extraction with 200 mL of diethyl ether.

B.) Determine FsubA after two extractions, using 100 mL of diethyl ether in each of the extractions.

C.) Determine FsubA after four extractionsm using 50 mL of deithyl ether in each of the extractions.

WHAT are the non-visible controls stored in Visual Studio IDE

- Delcare variable data type as decimal (5 variables needed) count, price, subtotal, tax, total

- Write a do while loop, if the price is not -1, loop continues show count number enter price get subtotal increase count

- Calculate tax, total

- Display total count, subtotal, tax, total

A series circuit contains a 3.00-H inductor, a 2.40-μF capacitor, and a 25.0-Ω resistor connected to a 120-V (RMS) source of variable frequency. Find the power delivered to the circuit when the frequency of the source is each of the following.
(a) the resonance frequency
(b) one-half the resonance frequency
(c) one-fourth the resonance frequency
(d) two times the resonance frequency
(e) four times the resonance frequency

From your calculations, can you draw a conclusion about the frequency at which the maximum power is delivered to the circuit?

What is the pH of a 0.1 M solution of Sodium Acetate? (Hint: the acetate ion is a conjugate base of acetic acid)

Calculate Brunt-Vaisala Frequency for a neutrally stable dry atmosphere

1)Vitamin A and pro-vitamin A are molecules that contain only carbon and hydrogen atoms and do not have any amino acids. If scientists want to genetically engineer a plant to make pro-vitamin A, what type of gene or genes would the scientists need to insert in the plant cells? Would they insert a gene that codes for pro-vitamin A? If not, what type of molecule would the gene or genes have to code for? Explain your reasoning.

2)Scientists have identified genes for two enzymes needed to make pro-vitamin A. One of these genes comes from corn. If this gene from a corn plant is inserted in the DNA of a rice plant, will the sequence of amino acids in the protein produced by the rice plant be the same as the sequence of amino acids in the protein produced by the corn plant? In other words, will rice plants that have this gene produce the same enzyme as corn plants produce? Explain why or why not.

3)Once scientists have identified the genes for enzymes to produce provitamin A, how could they insert these genes in the DNA of rice plant cells? Suggest one possibility.

4)Would you recommend that scientists try to insert the genes for enzymes to produce pro-vitamin A into:

a. all the cells in a rice plant

b. the thousands of cells in each rice grain or

c. a small group of embryonic rice plant cells that can divide and develop into a rice plant?

Explain your reasoning.

5) To insert genes from one organism into a different organism, scientists often take advantage of the natural genetic engineering capabilities of bacteria or viruses. One type of bacteria genetically engineers plant cells by inserting part of its bacterial DNA into the plant cell DNA, thus producing recombinant DNA. The inserted bacterial genes code for proteins that:

• stimulate the genetically engineered plant cells to produce food molecules that only the bacteria can use
• stimulate these genetically engineered plant cells to divide and form a growth that bulges out from the stem or root.

Explain how this type of genetic engineering is useful for the bacterium.

Many laws govern the physical universe (e.g. Newton's Universal Law of Gravity or Kepler's Laws of Planetary Motion) and can be expressed mathematically. Do you believe that mathematics is inherently part of the universe, or do you believe that mathematics is simply a tool we have developed to model behavior of objects in our universe? Another way of thinking of this issue is the following: why should the universe allow us to describe it mathematically?

Imagine that a polluter starts dumping sodium chloride into Lake Charles at a rate of 1437.3 kg per day, that the background concentration of NaCl in the lake was 11.3 ppm, and that the residence time of NaCl in the lake is 3.5 years. After 5 years, the Environmental Protection Agency catches on and turns off this source of NaCl. What would be the maximum concentration of NaCl in the lake? Please give your answer in ppm. Lake Charles has a volume of 1.8*107 m3.

equal volumes of solutions of the given concentrations are mixed together. which of the resulting aqueous solutions makes a buffer?

Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 13 m/s at an angle 52 degrees; with respect to the horizontal. Sarah catches the ball 1.5 meters above the ground.

1.What is the maximum height the ball goes above the ground?

2. After catchingt he ball, Sarah throws it back to Julie. The ball leaves Sarah's hand a distance of 1.5 meters above the grounf, and is moving with a speed of 10m/s when it reaches maximum height of 8m above the ground. Wat is the speed of the ball when t leaves Sarah's hand?

3.How high above the ground will the ball be when it gets to Julie?

fluid moving into the brain after a traumatic brain injury can result in swelling of the brain. what type of solution(hypertonic, isotonic, hypotonic)would doctors use to relieve the swelling. why. 5 marks