Posts by KnowsNothing

Total # Posts: 10

Chemistry 12
The complete combustion of 1.00mL of octane increases the temperature of 250.00g of water by 22.7 degrees Celsius. The density of octane is 0.70g/mL. What is the efficiency of the octane in heating the water? I attempted this question and I have -400 something percent ...

Math (Adv. Functions)
Given that triangle ABC with sides a, b, and c, show that the area of the triangle is given by A = ((a^2)(sinB)(sinC))/((2sin(B+C)))

Is lead non-polar covalent, polar covalent, ionic, network, or metallic and why?

calculus (vectors)
Determine a vector that is orthogonal to the vector e = [3, -1, 4]

A molecule has a glycerol backbone. The branches off of the three carbons are as follows: o-co-(ch2)14 - ch3 o-co-(ch2)12 - ch3 o-co-(ch2)16 - ch3 What is this compound called?

When a polynomial is divided by (x+2), the remainder is -19. When the same polynomial is divided by (x-1), the remainder is 2. Determine the remainder when the polynomial is divided by (x-1)(x+2).

In a Milliken type experiment, two horizontal parallel plates are 1.0 cm apart. A sphere of mass 2.2 x 10^(-13) kg remains stationary when the potential difference between the plates is 350V with the upper plate is negative. How much excess or deficit of electrons does the ...

What is the difference between electric force, electric potential energy, electric field strength, electric potential, and electric potential difference?


A bullet with the mass of 45 g is fired into an 8.3 kg block of wood resting on a floor against a spring. This ideal spring (k = 76 N/m) has a maximum compression of 28 cm. What was the initial speed of the bullet?

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