1.

A researcher is performing experiments on the synthesis of a membrane-bound protein (like a receptor protein). Where in the cell should he/she investigate?

A place-kicker must kick a football from a point 36.0 m (about 40 yards) from the goal. Half the crowd hopes the ball will clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 21.2 m/s at an angle of 46.0° to the horizontal. (a) By how much does the ball clear or fall short (vertically) of clearing the crossbar? (Enter a negative answer if it falls short.)

(b) Does the ball approach the crossbar (and cross above or beneath it) while still rising or while falling?

1. The factors an entrepreneur should consider before launching into e-commerce.
2. What are the 11 myths of e-commerce and how you will avoid falling victim to them.
3. What are some basic strategies entrepreneurs should follow to achieve success in their e-commerce efforts.
4. What are some techniques of designing a killer Web site.
5. How will you track the results from your Website. Describe common metrics that e-companies use to track the effectiveness of their Web sites
6. Describe how e-businesses ensure the privacy and security of the information they collect and store from the Web.

520/5000

State the hypotheses of the causes of why: of each of the following alternatives.

A) automobile (without gasoline and without brake) slows down and stops;
b) a book that slides on the table slows down and stops;
c) a falling chalk increases its speed until it hits the ground;
d) a ball rolling down a slope increases its speed until it reaches the lowest part;
e) The Moon moves around Earth and moves with approximately constant speed.

Part two:

Design an experiment where you check that the acceleration coincides with the direction of the resulting force.

A skydiver jumps out of an airplane at a high altitude and reaches terminal speed.

Which of the following statements about the falling skydiver at terminal speed is FALSE?

1) The gravitational potential energy of the skydiver-Earth-atmosphere system is decreasing.

2) The thermal energy of the skydiver-Earth-atmosphere system is increasing.

3) The air resistance force does negative work on the skydiver.

4) At terminal speed, the kinetic energy of the skydiver is constant.

5) The gravitational force on the skydiver must be larger than the air resistance force in order to maintain a downward velocity.

In the past few weeks we have learned that the number of miles driven has fallen due to people staying at home during the coronavirus pandemic. Insurers are offering auto insurance rebates to policyholders due to the decrease in number of miles driven. New research however indicates that this does not tell the entire driving story.

1. Although miles driven and traffic congestion are falling, both the accident rate and severity of accidents seems to be rising. Please explain what’s happening and why.  

What can be done to improve safety? Is it time to act to address this issue?

2. Does resting membrane potential and equilibrium potential of sodium both change during an action potential?

3. How is the action potential affected with a defect in the Na+/K+ pump and a deleterious mutation in the leak channels?

Externalities are costs or benefits associated with consumption or production that are not incurred by the consumer or producer and are therefore not reflected in market prices. The cost or benefit of an externality remains external when falling to parties other than the buyer or seller.

Respond to the following:

• Describe some differences between a positive externality and a negative externality.
• Provide one example of a positive externality and a negative externality, respectively. Explain your reasoning.
• How could you solve your examples of externalities to attain market efficiency?
• Does the government need to intervene with externalities to affect market efficiency?

A place-kicker must kick a football from a point 36.0 m (about 40 yards) from the goal. Half the crowd hopes the ball will clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 22.4 m/s at an angle of 47.0° to the horizontal. (a) By how much does the ball clear or fall short (vertically) of clearing the crossbar? (Enter a negative answer if it falls short.) m (b) Does the ball approach the crossbar (and cross above or beneath it) while still rising or while falling?