Questions
A circular loop in the plane of the paper lies in a 0.78 T magnetic field...

A circular loop in the plane of the paper lies in a 0.78 T magnetic field pointing into the paper.

A) If the loop's diameter changes from 16.6 cm to 6.4 cm in 0.63 s , what is the direction of the induced current? Clockwise or Counterclockwise?

B) What is the magnitude of the average induced emf? Answer in V.

C) If the coil resistance is 4.3 ohm , what is the average induced current? Answer in A

In: Physics

1 - Is PID control used in Feed Forward or Feed Back control? 2 - We...

1 - Is PID control used in Feed Forward or Feed Back control?

2 - We have a controller, and every time the Operator changes the Set Point, the controller responds, and gets the process sorted out. Now, somewhere, we have read that load disturbances needed to be considered in processes, as well. How will this controller react, if there is a load disturbance, and not a Set Point change?

In: Electrical Engineering

In a large, sexually reproducing population with random mating with respect to phenotype, the frequency of...

In a large, sexually reproducing population with random mating with respect to phenotype, the frequency of an allele changes from 20% to 60% across several generations. Based upon this change in allele frequency, the most likely cause of the change is

that the allele mutates readily.
that genetic drift is responsible for the increase in the allele’s frequency.
that the allele codes for a trait that is maladaptive in thepopulation.
that the allele codes for a trait that is adaptive in thepopulation.

In: Biology

National income measures: Select one: a. the amount of wage, rent, interest, and profits income actually...

National income measures:

Select one:

a. the amount of wage, rent, interest, and profits income actually received by households.

b. the after-tax income of resource suppliers.

c. the total of all sources of private income plus government revenue from taxes on production and imports.

d. nominal GDP after it has been inflated or deflated for changes in the value of the dollar.

In: Economics

Discuss what needs to be done as part of closing a project. Why are these activities...

  1. Discuss what needs to be done as part of closing a project. Why are these activities important?
  2. Discuss the internal post project evaluation process and the two types of meetings involved
  3. List several questions that you would ask during a post-project evaluation and describe changes that you would make in your next project to improve based upon possible responses to the questions.

In: Operations Management

1. Define chemistry and provide examples of matter 2. Characterize the 3 states of matter with...

1. Define chemistry and provide examples of matter 2. Characterize the 3 states of matter with respect to the definiteness or indefiniteness of shape and volume 3. Explain the difference between elements, compounds, and homogeneous and heterogeneous mixtures 4. Represent elements and compounds using chemical symbolism 5. Distinguish between atoms and molecules 6. Describe the difference between chemical and physical properties and changes.

In: Chemistry

You have been asked to review the useful lives of your company's fixed assets and recommend...

You have been asked to review the useful lives of your company's fixed assets and recommend any appropriate changes. Your company uses incentive compensation broadly across management levels and the incentives are tied to current profits. If you recommend shorter useful lives it will have an adverse impact on profits in the short term. How should you approach this assignment?

In: Accounting

A 4-month old baby is admitted to the hospital with a fever of 104o F (compared...

A 4-month old baby is admitted to the hospital with a fever of 104o F (compared to a normal temperature of 98.6o F) and a decreased blood pH. Why is it critical to reduce this fever as quickly as possible and restore normal pH? Discuss the role and sensitivity of proteins in (1) normal body chemical processes and (2) how enzyme activity is directly affected by changes in pH or temperature.

In: Biology

Assume you have a suspension of photosynthetic cells carrying out C3 photosynthesis in the presence of...

Assume you have a suspension of photosynthetic cells carrying out C3 photosynthesis in the presence of 1000 ppm carbon dioxide (0.1%) and 20% oxygen. What effect would the following changes in conditions have on the levels of G3P being produced? Explain your reasoning.               

a) Carbon dioxide concentration is suddenly reduced 1000-fold.                                               

b) Light is suddenly switched off.

In: Biology

Thermodynamics Air at 3.5 MPa and 500°C is expanded in an adiabatic gas turbine to 0.2...

Thermodynamics

Air at 3.5 MPa and 500°C is expanded in an adiabatic gas turbine to 0.2 MPa. Assume that the process is reversible. Changes in KE and PE may be neglected and the average temperature of the gases is 550 K.

(a) Create a schematic representation of the equipment. (b) Represent the process on a T-s diagram. (c) Determine the polytropic exponent. (d) Determine the change in entropy for this expansion process

In: Mechanical Engineering