Physics
In a "worst-case" design scenario, a 2000-{\rm kg} elevator with broken cables is falling at 4.00 {\rm m/s} when it first contacts a cushioning spring at the bottom of the shaft. The spring is supposed to stop the elevator, compressing 2.00 {\rm m} as it does so. Dur...
math
thank you very much!
math
half of a gallon is a half gallon. half of a half gallon is a quart. half of a quart is a pint. half of a pint is a cup. a cup is what fraction of a quart? Is the answer 1/4?
3rd grade math - arrays
Mary says that the greater number of counters, the greater the number of different arrays you can form. Give an example that shows that Mary is wrong.
math
one fourth of the students earned A's. There were 280 students. How many earned A's? I got 70 for the answer but what is the percentage for that? Would it be 70%?
math
duh, so easy I should have known that, thank you very much
math
a boy travels 20 km north, then 15 km south, how far is he from where he started?
Organic Chemistry
Write the mechanism for the reactions of: • (Z)-3,6-diethyl-oct-4-ene and bromine • (E)-3,6-diethyl-oct-4-ene and bromine Assign the R/S configuration for each of the products and determine the stereochemical relationship of each set of products.
Calculus
Use implicit differentiation to find the slope of the tangent line to the curve –2x^2–2xy–1y^3=–3 at the point (–1–1).
Physics
1.) ((m*v^2)/r1)+ma
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