maths
Let a, b, c and d be vectors. (i) Show that (a - b) * (a + b) = a^2 - b^2
Physic
A block (mass 2.4 kg) is hanging from a massless cord that is wrapped around a pulley -3 2 (moment of inertia of the pulley = 1.3 x 10 kg·m ), as the drawing shows. Initially the pulley is prevented from rotating and the block is stationary. Then, the pulley is allowed ...
English
Thank you so much!
English
Rephrase the main idea of the sample in your own words, without repeating words or sentence structure from the original statement. (I honestly can't seem to decide on how it should be worded) "Air pollution can also have a significant impact on our economy. It can cos...
English
I have: NPD have pointed out that smartphones have rapidly increased 84 percent from 2007 to 2008, and are currently selling fast in America.
English
Rephrase the main idea of the sample in your own words, without repeating words or sentence structure from the original statement. "Right now, smartphones are selling like mad in the U.S. market, where sales jumped 84 percent between 2007 and 2008, according to NPD, the m...
East
I need an equation that has something to do with the role of static friction in the design of tires
maths
n! is greater or equal to 2^n-1 prove by induction
math
A tree is struck by lightning. The top part breaks and falls to the ground. The part of the tree still standing is 30 feet tall and the top part that hit the ground is 40 feet from the base of the tree. How tall was the tree originally?
maths
integrate by parts integrate (4+x^2)^1/2
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