physics
Two stars are 2.4 × 1011 m apart and are equally distant from the earth. A telescope has an objective lens with a diameter of 1.72 m and just detects these stars as separate objects. Assume that light of wavelength 590 nm is being observed. Also, assume that diffraction ...
PHYSICS
Two parallel slits are illuminated by light composed of two wavelengths. One wavelength is λA = 553nm. The other wavelength is λB and is unknown. On a viewing screen, the light with wavelength λA = 553nm produces its third-order bright fringe at the same place ...
PHYSICS
In the lungs there are tiny sacs of air, which are called alveoli. An oxygen molecule (mass = 5.30 × 10-26 kg) is trapped within a sac, and the uncertainty in its position is 0.120 mm. What is the minimum uncertainty in the velocity of this oxygen molecule?
math
find the amount due on a $300 invoice recieved on june 3 and paid on june 11 if the sales terms are 3/15, n/30
chemistry
the density of mercury is 13.6 g/cm3. how many liters are in 829 grams of Hg.
Life Orientation
Hi I am a matric learner and I am having trouble with an lo portfolio assignment. it is about environmental issues and im stuck. I need to identify and describe 3 environmental health hazards that cause ill health, accidents, crisis and disasters within my community or any oth...
Math
List all potential rational zeros of 9x^3+6x^2-29x-10
chemistry
Al2(SO4)3+6KOH-->2Al(OH)3+3K2SO4 a)How many grams of potassium hydroxide are needed to completely react with 870 mg of aluminum sulfate? b)If you want to make 7.00 grams of potassium sulfate, how many grams of aluminum sulfate would you need to react? c)How many grams of al...
Math
A multiple choice quiz contains five question. Each question has four answer choices. Michael is not prepared for the quiz and decides to guess for each question. What is the probability that Michael will get at least one question correct? What is the probability that Micheal ...
english.
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