A newspaper infographic titled "Social Media Jeopardizing Your Job?" summarized data from a survey of 1,845 recruiters and human resource professionals. The infographic indicated that 52% of the people surveyed had reconsidered a job candidate based on his or her social media profile. Assume that the sample is representative of the population of recruiters and human resource professionals in the United States.

(a)

Use the given information to estimate the proportion of recruiters and human resource professionals who have reconsidered a job candidate based on his or her social media profile using a 95% confidence interval. (Use a table or technology. Round your answers to three decimal places.

( . , )

Give an interpreation of the interval context
We are 95% confident that the mean number of recruiters and human resource professionals who have reconsidered a job candidate based on his or her social media profile falls within this interval.

We are 95% confident that the true proportion of recruiters and human resource professionals who have reconsidered a job candidate based on his or her social media profile falls within this interval.

There is a 95% chance that the true proportion of recruiters and human resource professionals who have reconsidered a job candidate based on his or her social media profile falls within this interval.

We are 95% confident that the true proportion of recruiters and human resource professionals who have reconsidered a job candidate based on his or her social media profile falls directly in the middle of this interval.

There is a 95% chance that the true proportion of recruiters and human resource professionals who have reconsidered a job candidate based on his or her social media profile falls directly in the middle of this interval.Give an interpretation of the interval in context.

Give an interpretation of the confidence level of 95%.

Of all possible random samples, 95% would result in an interval that includes the actual value of the population proportion.

Of all possible random samples, 95% would result in an interval that lies below the actual value of the population proportion.

Of all possible random samples, 5% would result in an interval that lies above the actual value of the population proportion.

Of all possible random samples, 95% would result in an interval that is centered at the actual value of the population proportion.

Of all possible random samples, 5% would result in an interval that includes the actual value of the population proportion.

(b)

Would a 90% confidence interval be wider or narrower than the 95% confidence interval from part (a)?

wider

narrower

b) Ethane gas at 1 bar and 25 oC is compressed adiabatically to 55 bar in a steady-state flow process for which W = 10 J mol-1. Assume ethane is ideal gas at its initial state and the residual enthalpy of the gas at its final state is - 3270 J/mol, and its heat capacity is constant (CP = 4.5 R), the temperature of ethane at the final state, i.e., after compression, is

i. 403.3 oC; ii. 403.3 K; iii. 130.1 oC; iv. 130.1 K v. Other

c) Air enters the opening of a jet engine of an airplane flying at Mach 2.2. We want to convert the kinetic energy of the incoming airflow to pressure before the air is introduced to the entrance of a compressor, which is to compress the air stream to a pressure that is slightly higher than that in the combustion chamber. To increase the efficiency of such a conversion of energy, we should design the engine entrance channel as a diffuser so that

i) dP/dx > 0 ii) du/dx < 0; iii) dA/dx < 0; iv) I, ii, and iii ; v) None

Answer BOTH and EXPLAIN WHY

Biology: Topic - Molecules of Life

1. How many bonds can a carbon atom have?

2. Explain (Understand) that functional groups provide molecules with new chemical characteristics.

3. Define metabolism, catabolism, anabolism

4. Define polymer, define monomer

5. List the four macromolecules of life (polymers) and the monomers that each are made up of

6. Define enzyme

7. Define carbohydrate

8. Differentiate between a monosaccharide, disaccharide, and a polysaccharide (define).

9. Compare structure and functions of starch, cellulose, glycogen, and chitin.

Determine the activation energy (kJ) from the following table.

Temperature (K)          427                  417                  409 407 399

k (s^-1)                           0.00108 0.000410         0.000208         0.00016 0.0000763

You have discovered a new enzyme and want to characterize its function. The reaction catalyzed is 20 times more rapid at 25° C than at 4° C. Calculate the activation energy (kJ) for the reaction.

The Enzyme Lactase experiment design

Material required:

Skim milk, lactase drops, test tubes, glucose test strips, eye dropper, mixing spoon, graduated cylinder

If you actually conducted this experiment, what safety issues would you need to identify?

If you actually conducted this experiment, what appropriate precautions would you take to ensure that you performed the experiment safely?

If you actually conducted this experiment, what results would you expect to see?

Describe what occurs after the toothpick is dropped into each bottle . ( each bottle is filled with 1/3 of hydrogen peroxide and must shake each bottle for 15 minutes with each item in it then light a tooth pick on fire blow it out and drop it into the bottle with the cap on but not twisted) what hapepns ?

Bottle 1- Nothing added________

Bottle 2- Raw meat added________

Bottle 3- Cooked meat added____________

Talk about the difference between the behavior of the three bottles. Be sure to comment on the possible effect of cooking enzyme activity.

Which of the following statements about topoisomerases is FALSE?

Type I AND type II topoisomerases can both increase or decrease L.

In the reaction catalyzed by type I topoisomerases, the enzyme changes conformation to provide the energy required to change the linking number of the DNA.

Type I topoisomerases use a tyrosine side chain in their active site to catalyze a nucleophilic attack.

Type I topoisomerases do not use ATP in their reaction mechanism.

Type II topoisomerases can increase writhe because they use ATP in their reaction mechanism.

The sirtuins are a class of NAD-dependent deacetylases that are thought to play a role in the cellular response to nutritional status. Some sirtuins are involved in remodeling chromatin structure. A) How would you expect deacetylation of histones to affect the transcriptional activity of genes? B) Sirtuin 3 (Sirt3) deacetylates a specific lysine in the active site of acetyl-CoA synthetase, activating the enzyme. Why would this particular deacetylation reflect nutritional status? Remember, acetyl-CoA synthetase catalyzes the reaction: ATP + acetate + CoA <=> AMP + PPi + acetyl-CoA

Which of the following substances is secreted by sweat glands in response to breakdown of proteins and formation of ammonia? which of the following describe the function of the neuron? A.creates electrical impulses B.transmits sensory information C.stores potassium ions

Which of the following statements is a valid conclusion from the experiment above? A. Killed bacteria components can make live bacteria deadly B. Dead bacteria are more deadly than live bacteria C.Protein are dangerous to bacteria and kill them D.Protease enzyme causes live bacteria to become deadly