hungdeptrai27092002

A loaded penguin sled weighing 84 N rests on a plane inclined atangle ? = 20° to the horizontal (Fig. 6-23). Between the sled andthe plane, the coefficient of static friction is 0.27, and thecoefficient of kinetic friction is 0.12. (a) What is the minimummagnitude of the force , parallel to the plane, that will preventthe sled from slipping down the plane? (b) What is the minimummagnitude F that will start the sled moving up the plane? (c) Whatvalue of F is required to move the sled up the plane at constantvelocity?

A rough inclined plane, rises 1cm for every 5cm along the inclined length. Calculate the effort required to drag a body weighing 150 N up the plane, when the effort is applied parallel to the plane. Take coefficient of friction as 0.3.

The protease from HIV-1 possesses a catalytic diad of two Asp amino acids: Asp25 on domain 1 with a pKa = 3.3; Asp25’ on domain 2 with a pKa = 5.3. Both domains participate in the active site of the protease. In the first step of peptide hydrolysis, one Asp acts as a base, accepting a proton from water and the other Asp acts as an acid, donating a proton to a peptide carbonyl group. The resulting tetrahedral intermediate is not covalently bound to the enzyme. Write a mechanism for HIV-1 protease.

Carter and Isabella run a carwash business. They split the revenue

50/50. They are deciding on if they should join forces with Carla's carwash.

If they join with Carla, the combined carwash will make $2400 more per month, but they'll have to split revenue equally

(33.3/33.3/33.3).

On an average month, Carter and Isabella's carwash makes $6000.

How much more or less would Carter or Isabella individually make if they merged with Carla's carwash? *

$200 less

$400 more

$200 more

$400 less

1. Why does the U.S. presence in Iraq pose an ethical dilemma? 

2. Name three specific reasons for the GPI to show less growth in economic health than the GDP. 

3. Name the four analytic indicators of globalization's effect and pick one country to examine with each indicator. 

4. Ethical dilemmas often come with a country's advancements in technology. Why do you think this is so? Include one of the more prominent dilemmas of the 20th century in your answer. 

Class: Fashion Design

1. What is the difference between a fashion designer and a technical designer?

2. What would be a good entry-level position if you wanted to be a buyer? How would this position help you grow in the field?

3. Name two kinds of businesses that you could start in the fashion industry and explain what skills you would need to start them.

4. What skills does being an accessory designer require that being a sales representative does not?

5. What are the advantages and disadvantages of being an entrepreneur in the fashion industry rather than working for someone else?

Is any hydrogen containing substance that is capable of donating a proton to another?

A chemist prepares a solution of silver(I) perchlorate AgClO4 by measuring out 1.04*^10³Î¼mol of silver(I) perchlorate into a 350.mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in μmol/L of the chemist's silver(I) perchlorate solution. Be sure your answer has the correct number of significant digits.

A chemist prepares a solution of silver (I) pre-chlorate(AgCIO4) by measuring out 4.2×10^2 umol of silver pre-chlorate into a 350 mL volume metric flask and filling the flask to the mark with water. Calculate the concentration and umol /liters of the chemists silver plate chlorate solution, be sure your answer has the correct number of significant digits