4. Name a big idea (major concept) in your subject area and write a one paragraph rationale for why students should learn it.

## 4. Name a big idea (major concept) in your subject area and write a one paragraph rationale for why students should learn it.

Computer education improves students’ investigation skill by encouraging them to … Read More...
suppose that you wish to construct a simple AC generator with an output of 12.0576 v maximum when rotated at 60 Hz . A magnetic fields of 0.050 T is available . If the area of the rotating coil is 100 cm, How many turns are needed? A) 16 B)32 C)64 D) 128 E)160.

## suppose that you wish to construct a simple AC generator with an output of 12.0576 v maximum when rotated at 60 Hz . A magnetic fields of 0.050 T is available . If the area of the rotating coil is 100 cm, How many turns are needed? A) 16 B)32 C)64 D) 128 E)160.

Standard based Curriculum In standard based curriculum, the initial point … Read More...
A capacitor is charged with a battery. Then, with the battery connection maintained the plates are moved closer together. Then results in, a) a decrease in capacitance , b) a decrease in charge on the plates. c) a decrease in the electric fields between the plates. , d) an increase in the energy stored. e) a change in the potential between the plates.

## A capacitor is charged with a battery. Then, with the battery connection maintained the plates are moved closer together. Then results in, a) a decrease in capacitance , b) a decrease in charge on the plates. c) a decrease in the electric fields between the plates. , d) an increase in the energy stored. e) a change in the potential between the plates.

4. A farmer in Georgia has a 100-acre farm on which to plant watermelons and cantaloupes. Every acre planted with watermelons requires 50 gallons of water per day and must be prepared for planting with 20 pounds of fertilizer. Every acre planted with cantaloupes requires 75 gallons of water per day and must be prepared with for planting with 15 pounds of fertilizer. The farmer estimates that it will take 2 hours of labor to harvest each acre planted with watermelons and 2.5 hours of labor for each acre planted with cantaloupes. He believes that watermelons will selce for about \$3 each, and cantaloupes will sell for about \$1 each. Every acre planted with watermelons is expected to yield 90 salable units. Every acre planted with cantaloupes is expected to yield 300 salable units. The farmer can pump 6,000 gallons of water per day for irrigation purposes from a shallow well. He can buy as much fertilizer as he needs at a cost of \$10 per 50-pound bag. Finally, the farmer can hire laborers to the harvest the fields at a rate of \$5 per hour. If the farmer sells all the watermelons and cantaloupes he produces, how many acres of each crop should the farmer plant to maximize profits? a. Reformulate an LP model for this problem. b. Sketch the feasible region for this problem. c. Determine the optimal solution to the problem by enumerating the corner points.

## 4. A farmer in Georgia has a 100-acre farm on which to plant watermelons and cantaloupes. Every acre planted with watermelons requires 50 gallons of water per day and must be prepared for planting with 20 pounds of fertilizer. Every acre planted with cantaloupes requires 75 gallons of water per day and must be prepared with for planting with 15 pounds of fertilizer. The farmer estimates that it will take 2 hours of labor to harvest each acre planted with watermelons and 2.5 hours of labor for each acre planted with cantaloupes. He believes that watermelons will selce for about \$3 each, and cantaloupes will sell for about \$1 each. Every acre planted with watermelons is expected to yield 90 salable units. Every acre planted with cantaloupes is expected to yield 300 salable units. The farmer can pump 6,000 gallons of water per day for irrigation purposes from a shallow well. He can buy as much fertilizer as he needs at a cost of \$10 per 50-pound bag. Finally, the farmer can hire laborers to the harvest the fields at a rate of \$5 per hour. If the farmer sells all the watermelons and cantaloupes he produces, how many acres of each crop should the farmer plant to maximize profits? a. Reformulate an LP model for this problem. b. Sketch the feasible region for this problem. c. Determine the optimal solution to the problem by enumerating the corner points.

6.[ Book Section 7.6] Using Table 7.2, determine which of these fields can be either an electric or a magnetic field (state whether they satisfy the necessary conditions): (a) A˙ (b) B˙ (c) C˙ = 2y3z˙ax + 3(x + 2)yz˙ay − (x − 1)z3˙az = ((z + 1)/ρ)cosφ˙aρ − 2sinφ/ρ˙az = 3/r2(3sinθ˙aφ + cosθ˙aθ )

## 6.[ Book Section 7.6] Using Table 7.2, determine which of these fields can be either an electric or a magnetic field (state whether they satisfy the necessary conditions): (a) A˙ (b) B˙ (c) C˙ = 2y3z˙ax + 3(x + 2)yz˙ay − (x − 1)z3˙az = ((z + 1)/ρ)cosφ˙aρ − 2sinφ/ρ˙az = 3/r2(3sinθ˙aφ + cosθ˙aθ )

A 10 cm long conducting bar in contact with two parallel conducting rails slides at constant speed of m/s to the left. A 0.20 T magnetic fields is present and point into the paper . the induced current through the resistor is. 1) 2.0 A CW 2) 1.0 A CW 3) zero 4) 1.0 A CCW 5) 2.0 A CCW.

## A 10 cm long conducting bar in contact with two parallel conducting rails slides at constant speed of m/s to the left. A 0.20 T magnetic fields is present and point into the paper . the induced current through the resistor is. 1) 2.0 A CW 2) 1.0 A CW 3) zero 4) 1.0 A CCW 5) 2.0 A CCW.

Two charges are arranged . If Q1 is negative, and the net electric fields at point A points left, then. a) Q2 is positive ; and |Q2|>|Q1||, b) Q2 is positive ; and |Q2||Q1|, e) Q2 is negative ; and |Q2|<|Q1|

## Two charges are arranged . If Q1 is negative, and the net electric fields at point A points left, then. a) Q2 is positive ; and |Q2|>|Q1||, b) Q2 is positive ; and |Q2||Q1|, e) Q2 is negative ; and |Q2|<|Q1|

A coil carrying a curent I, sits in a magnatic fields between the poles of a magnet , which statement about the loopis false? 1) The net force on the loop is zero , 2) The force on side X is different into the page , 3) The force on side Y is Zero. , 4) The force on side Z is directed out of the page , 5) The magnetic moment of the coil is out of the page.