A cart is attached to a hanging mass by a string that passes over a pulley. a) Draw free-body diagrams for the cart and the hanging mass (Clearly label all forces present and indicate their relative magnitudes) when the cart is moving:(i) on a horizontal track.(ii) up a track inclined at an angle .b) When the cart moves on an incline at constant speed, it is in equilibrium; i.e., the net force on it is zero. Does it require more, less, or the same tension in the string to pull the cart up the track at constant speed or down the track at constant speed? Explain your answer.c)Derive an equation for the work done by friction when the cart is moving up the track at constant speed. Show your work.

Here is a picture of a Binary Search Tree.



First, construct the Binary Search Tree using the following BinaryNode as we discussed in class.

public class BinaryNode {
        private int value;
        private BinaryNode leftChild;
        private BinaryNode rightChild;

        public BinaryNode(int value) {
                this.value = value;
                leftChild = null;
                rightChild = null;
        }

        public BinaryNode(int value, BinaryNode leftChild, BinaryNode rightChild)
        {
                this.value = value;
                this.leftChild = leftChild;
                this.rightChild = rightChild;
        }

        public int getValue() {
                return value;
        }

        public void setValue(int value) {
                this.value = value;
        }

        public BinaryNode getLeftChild() {
                return leftChild;
        }

        public void setLeftChild(BinaryNode leftChild) {
                this.leftChild = leftChild;
        }

        public BinaryNode getRightChild() {
                return rightChild;
        }

        public void setRightChild(BinaryNode rightChild) {
                this.rightChild = rightChild;
        }

        @Override
        public String toString() {
                return "BinaryNode: " +
                                "value=" + value;
        }
}

Second, print the nodes in level order, that is, the root node first, then the children of the root node, then the grand-children, etc. It is recommended that you accomplish this by using a queue to store the nodes, printing the first nodes that have been added to the queue.

Your program should print the following when it runs.

42 27 50 21 38 60 33 41 72

Submit the file LevelOrder.java when done.

Question 5: Describe why pulling a heavy object seems more hazardous than pushing it.

Question 6: What is the difference between local and whole body strength?

Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p.

A survey of 865 voters in one state reveals that 408 favor approval of an issue before the legislature. Construct the 95% confidence interval for the true proportion of all voters in the state who favor approval.

pension fund manager is considering three mutual funds. The first is a stock fund, the second is a long-term government and corporate bond fund, and the third is a T-bill money market fund that yields a sure rate of 5.4%. The probability distributions of the risky funds are:

The correlation between the fund returns is 0.0684.

What is the Sharpe ratio of the best feasible CAL? (Do not round intermediate calculations. Round your answer to 4 decimal places.)

(a) By what percent does the period of a simple pendulum change if you double its amplitude? (Assume the amplitude is small.)

0%

41%    

70%

100%

(b) By what percent does the period of a simple pendulum change if you double its mass?

0%

41%    

70%

100%

(c) By what percent does the period of a simple pendulum change if you double its length?

0%

41%   

70%

100%

Question 4:

Lucy is trying on clothes in the dressing room of Federal Department Store. Lucy goes home, but leaves her purse in the dressing room. A Federal employee, Beth, finds the purse in the dressing room and gives it to the storeowner. Assuming Lucy never returns to claim the purse, who is entitled to title to the purse and its contents, assuming the purse is (a) lost, (b) mislaid, or (c) abandoned?

If p is any positive number between 0 and 1, then p4 + C(4,3) p3(1–p) + C(4,2) p2(1–p)2 + C(4,1) p (1–p)3 + (1–p)4 = 1. Explain why without performing any calculation.

Please explain the concept behind this to me, and not just the chain of calculations or mathematical proofs.

At 20

Unemployment is a state that almost everyone experiences at some point in his or her career. For this assignment, you will write a two- to three-page essay on economic issues associated with unemployment.

Instructions

1. Research and write a short essay in which you describe how labor unions, the theory of efficiency wages, and the minimum-wage law affect the labor market. Your essay should answer the following questions:

• In what industries do labor unions play a significant role? How do labor unions affect unemployment?
• Describe how minimum wage works in the US. How does the minimum-wage law affect the unemployment rate? What is the connection between labor unions and minimum wage?
• What is the theory of efficiency wages and what impact does it have on unemployment?

A flask with a volume of 1.50L , provided with a stopcock, contains ethane gas (C2H6) at a temperature of 310K and atmospheric pressure 1.013

Smokey's Garage, Inc., provides routine auto diagnostics for customers in the Atlanta, Georgia, metropolitan area. Tests are supervised by skilled mechanics using equipment produced by two leading competitors in the auto test equipment industry. Staff at the company estimate that 4 tests per hour could be performed if they added another Sunny Tune System (STS) machine and 6 tests per hour could be performed on a new machine, the Car Care Tower (CCT). The STS can be leased at a cost of $5,000 per month, and the CCT can be leased at a rate of $9,000 per month. Labor to operate either of the machines would cost $3,000 per month. All other costs are fixed. On average, each machine is operated 25 eight-hour days per month. Smokey’s receives $15 for each test performed.

A. Compute and interpret the net marginal revenue products for the two types of equipment?

B. Should the company lease more STS machines? What about more CCT machines? Explain your answer.

A 4.92 kg particle-like object moves in a plane with velocity components v_x = 43.2 m/s and v_y = 35.7 m/s as it passes through the point with (x, y) coordinates of (5.46, -8.28) m. Just then, in unit-vector notation, what is its angular momentum relative to (a) the origin and (b) the point (-8.30, -8.30) m?

Saturated vapor R-134a enters the adiabatic compressor of a refrigeration system steadily at 25 psia. The refrigerant exits the compressor at 200 psia and 220 °F. a) Determine the work (Btu/lbm) required by the compressor for this process. b) Determine the flow work (Btu/lbm) for the refrigerant at the compressor exit. c) Determine the entropy change per unit mass for the refrigerant during the compression process. d) Determine the isentropic efficiency of the compressor. Include an appropriate sketch