Friday

January 20, 2017
Total # Posts: 12

**Math**

after 1st breath , diameter = 5cm after 2nd breath , diamieter = 1.2(5) = after 3rd breath, diameter = 5(1.2)^2=

*January 13, 2013*

**math help!!**

Suppose a function, f(x) has a vertical asymptote toward positive infinity at x= -1, A horizontal asymptote at y = 1=2 as x ¨}‡1, and a turning point at (1;-1). Sketch what you think the function would look like.

*July 16, 2012*

**math!!!**

Molten plastic is injected into the centre of a circular mold of constant height, H, through a small hole. The rate of injection is such that the radius of the plastic inside the mould increases so that r(t)= 3t^2 -2t^3 where the mold has maximum radius of one unit. Compute ...

*July 16, 2012*

**Math**

Find the absolute maximum and minimum of g(x) = (x^2 - 3)/ (x^2 + 1) on the interval [-1; 2]:

*July 14, 2012*

**science (very important)!!!!**

Calculate the final concentrations in mol/L of H+, Na+, Cl- and SO42- when the following three solutions are mixed together: 1000 cm3 of 0.10 mol dm-3 HCl 500 cm3 of 0.20 mol dm-3 NaCl 500 cm3 of 0.20 mol dm-3 of Na2SO4

*June 23, 2012*

**science!**

How much of a 0.10 M H2SO4 solution is required to neutralise 1g of NaOH? Express your answer in cm3.

*June 23, 2012*

**science**

Calculate the final concentrations in mol/L of H+, Na+, Cl- and SO42- when the following three solutions are mixed together: 1000 cm3 of 0.10 mol dm-3 HCl 500 cm3 of 0.20 mol dm-3 NaCl 500 cm3 of 0.20 mol dm-3 of Na2SO4

*June 23, 2012*

**physics**

@drwls: The "elastic" part was a typo because it says "in elastically" above; an unnecessary space was put in. With regards to the KE loss not necessarily ending up on the brake drums, I'd say that you are correct, but this looks to be an idealised ...

*May 12, 2011*

**physics**

A red car with a 70kW engine and a mass of 1335kg accelerates at full power for 2s from rest along a level stretch of road heading east before going down a 3m high hill. The driver puts the car in neutral to accelerate as they coast down the hill. Some distance beyond the hill...

*May 12, 2011*

**Number sence**

its 30!!

*May 11, 2011*

**Math**

-13500 not 18000

*April 26, 2011*

**Physics**

A 65kg boy and his 40kg sister, both wearing roller blades, face each other at rest. The girl pushes the boy hard, sending him backwards with a velocity of 2.9m/s towards the west. Ignore friction. What is the minimum amount of chemical energy is converted into mechanical ...

*April 7, 2011*

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