I have a digital watch, rated to go underwater to 100m. When it is underwater it can be read normally, up until you reach a certain angle, then suddenly, it becomes almost like a mirror, reflecting all the light that hits it, almost perfectly (you cannot read the digits, the entire surface becomes reflective.)

I've seen this happen with other waterproof watches too, so I don't think it's unique to mine or the specific model. I'm wondering what causes this? My physics teacher was stumped when I told him about this (we're doing lenses and imaging in physics right now.) I think it has something to do with internal refraction. I haven't been able to measure the angle it becomes reflective accurately, I estimate about 30-40 degrees. Near this critical point, it can be half and half reflective, where only half becomes a mirror, but it's always either reflective or not - never in between being reflective and non-reflective.

1. Batsheva sits on a spinning stool with her arms folded. What happens to her angular velocity if she

   does not move her body and the stool spins without friction

2. Eden and Ohad have the same mass. Eden sits at his desk in Rhode Island and Ohad sits at his desk in

   Ecuador (near the Equator). Who has more kinetic energy due to Earth’s rotation, Eden or Ohad, or is

   is the same

3. A space probe is launched from Earth and sent on a trip to the Moon, following a straight-line path.

   Is there a point along the way where the net gravitational force on the probe due to the Earth and

   Moon is zero, and if so is that point closer to the Earth or the Moon

4. Menachem Mendel and Moshe are the same weight and we wear identical shoes. When they both keep their feet on the ground, Menachem Mendel can lean forward farther than Moshe before falling. All other things being equal whose center of gravity is closer to the ground when both are standing straight

2. The three primary forms of business are sole proprietorships, partnerships, and corporations. You are contemplating starting a business. For each of the following proposals, explain which of the three types of businesses would be most appropriate. In each case describe the advantages and disadvantages of your choice.

(a) You are a music lover and are disgusted with the selection of compact discs available at the stores near your college. So, you decide to open up a store selling new and used compact discs.

(b) After a late night cram session, you and your roommate are in need of some pizza, but no restaurants are open. You decide to open an all night pizza parlor.

(c) You have an idea that will make you a billionaire before you graduate from college: a pizza delivery service - from any restaurant to any dorm. In order to make your revenue goal a reality, a local venture capital firm has informed you that you will need to nationally franchise your operation.

Trump’s imposition of $260 billion tariff in the Month of May 2019 (taxes on imports to the US Market) on Chinese exports to the US has caused a global tension in financial markets and related business activities. In retaliation of Trump’s tariff, China also imposed almost similar amount of tariff on US exports to China about $200 billon. In response to this trade war between the US and China, the US stock price indices of the Wall Street plummeted in May and June 2019. Th stock market in Shanghai in China also crashed at the same time. The data on new job for the US economy in May showed a very slow rate of job creation at the same time. Given this scenario from the US-China trade war and given your knowledge on macro model of AD an AS, do you think the the retaliation of China in response to Trump’s Tariff would have a negative impact on the US economy in near future? Give your reason in your opinion as to why or why not the case.

Trump’s imposition of $260 billion tariff in the Month of May 2019 (taxes on imports to the US Market) on Chinese exports to the US has caused a global tension in financial markets and related business activities. In retaliation of Trump’s tariff, China also imposed almost similar amount of tariff on US exports to China about $200 billon. In response to this trade war between the US and China, the US stock price indices of the Wall Street plummeted in May and June 2019. Th stock market in Shanghai in China also crashed at the same time. The data on new job for the US economy in May showed a very slow rate of job creation at the same time. Given this scenario from the US-China trade war and given your knowledge on macro model of AD an AS, do you think the the retaliation of China in response to Trump’s Tariff would have a negative impact on the US economy in near future? Give your reason in your opinion as to why or why not the case.or paste question here

Suppose you are an investment adviser at Kowloon East Investment Co., Ltd., a local asset management company. Richard, a wealthy dentist, recently approached you for some advice.

a. During a meeting you suggest that he should invest in around 30 equities drawn from several industries. Richard told you that “I trust my stock-picking ability and believe that I should invest my funds in the four best ideas. Why invest in 30 companies when I can identify the four best projects?” Comment on his statement.

b. You expect the market interest rate to decline in the near future even though the current bond market is not indicating any sign of this change. Which type of bond (e.g., short-term, long-term) would you suggest Richard to purchase to maximize his gains? Would you suggest him to purchase the bond now or wait until the market interest rate actually declines? Why?

32. Suppose the government was operating a balanced budget in the year 2025. The next year, in 2026, the government cut taxes by $20 billion.

Part 1: After the tax cut is implemented, what is the impact on public saving? Using an equation or model, explain your answer.

Part 2: Assume that all consumers believe the tax cut is going to be matched by a tax increase in the near future. As such, consumers save the full proceeds of the tax cut. What is the impact of the tax cut on private savings? Using an equation or model, explain your answer.

Part 3: Assume that all consumers believe the tax cut is permanent. As such, consumers spend the full proceeds of the tax cut. What is the impact of the tax cut on private savings? Using an equation or model, explain your answer.

Part 4: In both scenarios – (a) consumers save all of the tax cut and (b) consumers spend all of the tax cut – what is the impact on national saving? Using an equation or model, explain your answer both scenarios.

A type of foam ear plug has a 26 dB overall EPA noise reduction rating. Sally wants to sleep on her bus ride and decides to use these earplugs. The noise level inside the bus is 87 dB.
(A) What noise level would she perceive with the ear plugs that have the 26 dB noise reduction?
The reduced noise level would be _________ dB.
(B) A loud rock band produces a sound level of 117 dB at a location near the band. In a work environment, regulations limit exposure to this very loud sound to 30 minutes or less per day. What is the sound intensity of the rock band?
Intensity is __________ W/m².
(C) Using the ear plugs with 26 dB noise reduction, what sound level would she preceive?
She would preceive _________ dB sound level.
(D) What is the sound intensity she hears with the ear plugs?
Sound intensity, after attenuation by ear plugs, is ________ W/m²