Blog

Various horribly annoying delays just scrubbed your launch!  How many days do you have to wait until you can launch again (return to this same orbital configuration; aka the launch window)?

Assuming you are in Gainesville (29.7

The recently discovered dwarf planet Eris has an orbital period about the Sun of 557 years. What is the semi-major axis of its orbit?

You are a rocket scientist considering a Hohmann transfer orbit (from Earth) to the dwarf planet, Ceres, the largest (spherical) asteroid (RCeres = 0.075 REarth) in the belt between Mars and Jupiter.  Answer the following questions with this in mind, using your scratch paper when needed.

Which kinds of light can penetrate Earth’s atmosphere?

Once the spacecraft arrives at Ceres, you have it make a series of maneuvers to settle it into orbit around Ceres with a=2.29

If you go to regularly observe Mars through its entire sideral period, what phases of Mars would you expect to see?

The aberration of starlight

On January 1, year 1, Rodriguez Corp. granted stock options to corporate executives for the purchase of 10,000 shares of the company’s $20 par value common stock at 80% of the market price on the exercise date, December 30, year 1. On January 1, year 1, no market price or estimate could be made for the value of the options. All stock options were exercised on December 30, year 1. The quoted market prices of Rodriguez Corp.’s $20 par value common stock were as follows: January 1, year 1 $60 per share December 30, year 1 $80 per share As a result of the exercise of the stock options and the issuance of the common stock, Rodriguez should recognize compensation expense in year 1 of

At December 31, 2020, Whispering Company has a stock portfolio valued at $4,200. Its cost was $3,500. The Fair Value Adjustment account has a debit balance of $170 from the year-end, 2019.  Which year-end journal entry is appropriate?