1, Which carries more energy, yellow light with a wavelength of 580 nm or green light with a wavelength of 560 nm? (Explain or show a calculation).

2,Why do we see a characteristic color (in the flame) for each cation?

4,The energy of an electron in n = 1 for a hydrogen atoms was found to be -2.179 x10-18 J/atom. Convert this value to kJ/mole.

5,Calculate the energy of light emitted when an electron changes from n = 3 to n = 1 in the hydrogen atom. In what region of the spectrum is this radiation found?

Situation. Suppose that a pizza vendor at a basketball game can sell 3,000 slices of pizza per night at a price of OMR 3 per slice. If the vendor raises the price to OMR 4 per slice, the number of slices sold falls to 2,000. Please answer the following questions:

Q1. Calculate the PRICE ELASTICITY OF DEMAND with clear steps of working and formulae.   [4marks]

Q2. The observed value belongs to which type of price elasticity of demand? [1mark]

Q3. Describe in your own idea the demand situation and the shape of its curve in relation to the market changes.

(briefly explain and answer questions 1-4)

1.During fasting, muscle protein breakdown and lipolysis in adipose tissue are accelerated. How do these changes enhance glucose production by gluconeogenesis in liver?

2.Why might a genetic mutation in glucose 6-phosphate dehydrogenase alter the rates of synthesis of lipids?

3.How many ATP molecules would you expect from the conversion of a-ketoglutarate to malate in tightly coupled mitochondria?

4.The rate of oxidation of pyruvate by tightly coupled mitochondria is decreased if palmitoyl carnitine is added. Discuss the mechanism for this change.

1. Let’s use glucose as the metabolic fuel for aerobic respiration.

1. How many ATPs would be formed if NAD⁺were the sole electron carrier cofactor formed throughout the metabolic pathways of glycolysis, the citric acid cycle, and oxidative phosphorylation?

b.   How many H⁺would have to be pumped from the intermembrane space and into the matrix for the ATP synthase to generate all of these ATPs?

c. Answer question 2 (part a and b) but replace NAD⁺with FAD.

d. In ATP synthase, describe the process that promotes the conformational changes that facilitates the catalyzed reaction.

The bicarbonate buffering system can be described as shown below:

CO2(d) + H2O  H2CO3 Keq= 0.003 at 37C (Hint: this is a simple equilibrium) H2CO3  H+ + HCO3- Ka= 0.000269 at 37C (Hint: this is an ionization)

A. (2 pts) If the plasma pH is 7.4 and the plasma concentration of of HCO3- is 15 mM, what is the plasma concentration of H2CO3?

B. (1 pts) What is the concentration of CO2 (dissolved) ?

C. (1.) If the metabolic activity changes the concentration of CO2 (dissolved) to 3 mM and the [HCO3-] remains at 15 mM, what is the pH of the plasma?

Digital forensics is not solely about the processes of acquiring, preserving, analyzing, and reporting on data concerning a crime or incident. A digital forensic scientist must be a scientist first and foremost and, therefore, must keep up-to-date with the latest research on digital forensic techniques. They may also contribute to the discipline through their research and publish it in peer-reviewed journals. Consider how digital evidence collection techniques have changed and evolved over time. Discuss how technology has driven this change and how we have been able to adapt to these changes.

a) A continuously alternating voltage will produce what type of ultrasound signal from a piezoelectric transducer? Give an equation to describe the output. b) Electrical voltage pulses applied to a piezoelectric transducer will produce what type of signal? Give an equation to describe the output. c) The addition of damping material to a transducer changes what parameters? Which are advantageous and which are disadvantageous? How are the disadvantages accounted for? d) What is the limiting factor for resolution of an ultrasound scan? Explain. e) What are the factors that limit the depth at which an ultrasound image can be collected? Explain