3. The time T required to receive a message at node B from node A is an exponentially distributed random variable with mean 1/10 (milliseconds). The time T is measured from the moment that a message left node A to the moment that it was received by node B.

a) What is the probability that T exceeds 105 milliseconds?

b) What is the probability that a message is received after 200 milliseconds given that no message was received before 95 milliseconds? That is, calculate: P(T > 200 | T 95):

Andrew V. Omit was admitted to the hospital after he was suffering from nausea, vomiting, blurry vision, speech difficulties, and general weakness. In the two days before he was admitted, he developed double vision and breathing difficulties. It was later found that he had consumed food contaminated with Clostridium botulinum.

a)      What is he suffering from?

b)      What is the mechanism of action of this disease?

c)      Can this bacterium be used for cosmetic treatments? What are the risks associated with its medical use?

Two cards are drawn one after the other from a standard deck of 52 cards.

(a) In how many ways can one draw first a spade and then a heart?
(b) In how many ways can one draw first a spade and then a heart or a diamond?
(c) In how many ways can one draw first a spade and then another spade?

(d) Do the previous answers change if the first card is put back in the deck before the second card is drawn?

Identify factors that determine whether performance appraisals develop and motivate staff or discourage and demotivate staff. Identify biases that influence an individuals' ability to do a fair and objective performance appraisal. Identify what conditions should be present, before, during and after the performance appraisal that will increase the likelihood of a positive outcome. What experiences have you had with performance appraisals. Evaluate your personal experience with performance appraisals based on your readings. Were they successful in motivating you, why or why not.

A 74 kg soccer player jumps vertically upwards and heads the 0.45 kg ball as it is descending vertically with a speed of 26 m/s. If the player was moving upward with a speed of 4.0 m/s just before impact, what will be the speed of the ball immediately after the collision if the ball rebounds vertically upwards and the collision is elastic?
If the ball is in contact with the player's head for 20 ms, what is the average acceleration of the ball? (Note that the force of gravity may be ignored during the brief collision time.)

Washington Irving, “Rip Van Winkle”

1. How does Rip's "meekness of spirit" gain him popularity?

2. Why do the children follow Rip?

3. Discuss the description of the "amphitheater" before Rip falls asleep. Compare it to the description after he awakens. What is the significance?

4. Discuss the meaning of the changes at the village inn. In what ways does the behavior of the patrons change? What inspired the changes? What does this convey about human nature?

Colter Steel has $5,550,000 in assets. Temporary current assets $ 3,100,000 Permanent current assets 1,605,000 Fixed assets 845,000 Total assets $ 5,550,000 Short-term rates are 9 percent. Long-term rates are 14 percent. Earnings before interest and taxes are $1,170,000. The tax rate is 40 percent. If long-term financing is perfectly matched (synchronized) with long-term asset needs, and the same is true of short-term financing, what will earnings after taxes be?

SGX

1. Why is the initial program loaded into an SGX enclave unencrypted?
2. What does a client program have to verify before passing secrets to an SGX enclave?
3. What state must be encrypted to protect the contents of an SGX enclave from the operating system or virtual machine monitor?
4. Suppose code in an SGX enclave is waiting for data to arrive and calls the read() system call. What conditions must it check after the read() call returns to make sure it executes correctly?

At 700 K acetaldehyde decomposes in the gas phase to methane and carbon monoxide. The reaction is:
CH3CHO(g)→CH4(g)+CO(g)
A sample of CH3CHO is heated to 700 K and the pressure is measured as 0.43 atm before any reaction takes place. The kinetics of the reaction are then followed by measurements of total pressure and these data are obtained:

Question:

Find total pressure after 1.39×10⁴ s .