Identify a popular/common computer related product/solution that utilizes an interface that are not optimal for human interaction. It must clearly identify the original problem that lead to the development of the solution. Describe how the users resolve the problem before the solution was developed and after the development of the solution. Explain why you think the solution is not optimal and how to improve the solution to provide a better interface for human interaction.
In: Computer Science
A factory worker’s union is appealing to the factory management for more vacation time for its employees. The union claims that the workers are more productive when they come back from vacation than before (in other words, that production rate and vacation status are related). The following table contains the production rates, measured in units per hour, for a sample of employees. The union feels that it needs to be 90% confident (level of significance = 0.10) before going into talks with the employers. Does the union have strong enough evidence to support its claim?
| 100-125 Units Per Hr. | 126-150 Units per Hr | More than 150 Units per Hr. | Total | |
| Before Vacation: | 210 Workers | 319 Workers | 58 Workers | 587 |
| After Vacation: | 178 Workers | 387 Workers | 60 Workers | 625 |
| Total: | 388 | 706 | 118 | 1212 |
Hypotheses:
Test Statistic and value: P-value:
Conclusion:
In: Statistics and Probability
A child hits an ice cube with a mass of 10 grams on a table with a force of 10 N. The impact lasts 0.02 seconds. The ice cube flies off the table, which is 1 meter high and lands some distance away. Assume there is no friction between the ice cube and the table.
a. What is the velocity of the ice cube when it leaves the table?
b. What is the final velocity of the ice cube just before it hits the floor?
c. What is the momentum of the ice cube just before it hits the floor?
d. What distance will the ice cube land from the foot of the table?
e. Suppose the ice cube had broken into two pieces just after the child hit the ice and moved away from each other while falling to the floor. How would the total momentum of the two pieces just before they hit the floor compare to the momentum you found in part (c)?
In: Physics
Mongo Inc. needs someone to supply it with 200,000 cartons of machine screws per year to support its manufacturing needs over the next 5 years, and you've decided to bid on the contract. It will cost you $1,200,000 after-tax to install the equipment necessary to start production; you'll depreciate this cost straight-line to zero over the project's life. You estimate that in 5 years, this equipment can be salvaged for $75,000 before-tax. Your fixed production costs will be $350,000 before-tax per year, and your variable production costs should be $12.00 before-tax per carton. You also need an initial increase in account receivables of $100,000 and a decrease in account payable of $150,000, all of which will be recovered when the project ends. Your tax rate is 20 percent and you require a 10 percent return on your investment. What bid price per carton should you submit?
In: Finance
7. Ball X of mass 1.0 kg and ball Y of mass 0.5kg travel toward each other on a horizontal surface. Both balls travel with a constant speed of 5 m/s until they collide. During the collision, ball Y exerts an average force with a magnitude of 40N for 1/6s on ball X . Which of the following best predicts ball momentum after the collision?
A Ball Y will travel at a speed less than 5 m/s in the same direction of travel as before the collision.
B Ball Y will travel at a speed less than 5 m/s in the opposite direction of travel as before the collision.
C Ball will travel at a speed greater than 5 m/s in the same direction of travel as before the collision.
D Ball Y motion cannot be predicted because the impulse on it is not known.
The answer is C but I do not understand why. Please refrain from using any Calculus
In: Physics
A child hits an ice cube with a mass of 10 grams on a table with a force of 10 N. The impact lasts 0.02 seconds. The ice cube flies off the table, which is 1 meter high and lands some distance away. Assume there is no friction between the ice cube and the table. a. What is the velocity of the ice cube when it leaves the table? b. What is the final velocity of the ice cube just before it hits the floor? c. What is the momentum of the ice cube just before it hits the floor? d. What distance will the ice cube land from the foot of the table? e. Suppose the ice cube had broken into two pieces just after the child hit the ice and moved away from each other while falling to the floor. How would the total momentum of the two pieces just before they hit the floor compared to the momentum you found in part (c)?
In: Physics
The stockholders’ equity of TVX Company at the beginning of the day on February 5 follows: Common stock—$5 par value, 150,000 shares authorized, 59,000 shares issued and outstanding $ 295,000 Paid-in capital in excess of par value, common stock 525,000 Retained earnings 675,000 Total stockholders’ equity $ 1,495,000 On February 5, the directors declare a 16% stock dividend distributable on February 28 to the February 15 stockholders of record. The stock’s market value is $46 per share on February 5 before the stock dividend. The stock’s market value is $40 per share on February 28.
One stockholder owned 700 shares on February 5 before the dividend. Compute the book value per share and total book value of this stockholder’s shares immediately before and after the stock dividend of February 5.
Compute the total market value of the investor’s shares in part 2 as of February 5 and February 28.
In: Accounting
Today is 15 April 2020.
You are an audit manager of QUTPG Partners and are planning the audit of RST Co for the year ending 30 June 2020. The company is a manufacturer of digital devices and your have already had a planning meeting, with the finance director. Forecast revenue is $137.2m and profit before tax is $8.4m. The following notes from the planning meeting have been given to you.
Planning Meeting Notes
Required:
(a) Describe QUTPG Partners’ responsibilities in relation to the prevention and detection of fraud and error.
(b) Describe EIGHT audit risks, and explain the auditor’s response to each risk in planning the audit of RST Co.
In: Accounting

Nate the Skate was an avid physics student whose main non-physics interest in life was high-speed skateboarding. In particular, Nate would often don a protective suit of Bounce-Tex, which he invented, and after working up a high speed on his skateboard, would collide with some object. In this way, he got a gut feel for the physical properties of collisions and succeeded in combining his two passions." On one occasion, the Skate, with a mass of 115 kg, including his armor, hurled himself against a 833 kg stationary statue of Isaac Newton in a perfectly elastic linear collision. As a result, Isaac started moving at 1.61 m/s and Nate bounced backward.
What were Nate's speeds immediately before and after the collision? Enter positive numbers). Ignore friction with the ground
By the way, this brief bio of Nate the Skate is written in the past tense, because not long ago he forgot to put on his Bounce- Tex before colliding with the Washington Monument in a perfectly inelastic collision. We will miss him.
In: Physics
| Year 1 | Year 2 | Year 3 | Year 4 | Year 5 | |
| Revenues | $16,000 | $20,000 | $38,000 | $48,000 | $35,000 |
| Less: Cash expenses | ($8,000) | ($5,000) | ($14,000) | ($19,000) | ($19,000) |
| Less Depreciation | ($3,000) | ($4,000) | ($3,000) | ($3,000) | ($3,000) |
| Income before tax | $5,000 | $11,000 | $21,000 | $26,000 | $13,000 |
| Less: Tax @ 40% | ($2,000) | ($4,400) | ($8,400) | ($10,400) | ($5,200) |
| Income after tax | $3,000 | $6,600 | $12,600 | $15,600 | $7,800 |
| Add: Depreciation | $3,000 | $4,000 | $3,000 | $3,000 | $3,000 |
| After tax cash flows | $6,000 | $10,600 | $15,600 | $18,600 | $10,800 |
Right before opening the Lansing store discussed in problem 1, you have discovered that Fort Wayne forgot to budget 10% of revenues as a cash balance, 20% of cash expenses as an inventory balance, and 10% of cash expenses as an accounts payable balance. All of these balances would be needed at the beginning of each year and are estimated from the year-end annual estimates of revenues and cash expenses given earlier. Recalculate the cash flows for the Lansing store investment.
In: Finance