Tutor profile: Nitesh S.
Subject: Basic Math
Mrs. Rodger got a weekly raise of $145. If she gets paid every other week, write an integer describing how the raise will affect her paycheck.
Solution: Let the 1st paycheck be x (integer). Mrs. Rodger got a weekly raise of $ 145. So after completing the 1st week she will get $ (x+145). Similarly after completing the 2nd week she will get $ (x + 145) + $ 145. = $ (x + 145 + 145) = $ (x + 290) So in this way end of every week her salary will increase by $ 145.
What is octet rule? Write its significance and Limitations.
Octet rule— The atoms of different elements combine with each other in order to complete their respective octets (i.e., 8 electrons in their outermost shell) or duplet (i.e., the outermost shell having 2 electrons) in case of H, Li and Be to attain stable nearest noble gas configuration. 2 The significance of octet rule— It helps to explain why different atoms combine with each other to form ionic compounds or covalent compounds. Octet rule cannot explain the formation of BeCl2, PCl3, SF6 etc.
An engineer is designing the runway for an airport. Of the planes that will use the airport, the lowest acceleration rate is likely to be 3 m/s^2. The takeoff speed for this plane will be 65 m/s. Assuming this minimum acceleration, what is the minimum allowed length for the runway?
Given: vi = 0 m/s vf = 65 m/s a = 3 m/s^2 Find: d = ?? vf^2 = vi^2 + 2*a*d (65 m/s)^2 = (0 m/s)2 + 2*(3 m/s^2)*d 4225 m^2/s^2 = (0 m/s)2 + (6 m/s^2)*d (4225 m^2/s^2)/(6 m/s^2) = d d = 704 m (Ans)
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