Recent content by zcabral

Homework Statement Length of curve: y=1/2(ex-e-x) from 0 to 2 Homework Equations s = ∫√[1+(dy/dx)^2] dx The Attempt at a Solution [sqrt(4+2e^(-x)+e^x)]*[-1+e^x]/[1+e^x]. = 3.323971

Homework Statement Determine the volume of a sold obtained by rotating the region bounded by y=x^2-2x and y=x about the line y =4 Homework Equations The Attempt at a Solution Let: y1 = x y2 = x^2 - 2x. v be the volume. y1 and y2 meet where: x^2 - 2x = x x^2 - 3x = 0 x(x - 3) = 0 x = 0, x = 3...

ok so this is what i did now... pi [integral 0 to 2 (2x)^2-(2x-x^2)^2] = pi*-x^5/5 + 4x^4/4 |[0,2]

but it doesn't technically have a hole that goes all the way through rite? wouldn't that still make it a disk? i know it has a like a big chunk out of it

Homework Statement Find the volume of the solid formed by rotating the region inside the first quadrant enclosed by y=x^2 y=2x about the x-axis. Homework Equations V= pi* integral [a,b] r^2 The Attempt at a Solution So i used intergral 0 to 2 (2x-x^2)^2 dx this is wat i...

Find the volume of the solid formed by rotating the region inside the first quadrant enclosed by y=x^2 y=2x about the x-axis. So i used intergral 0 to 2 (2x-x^2)^2 dx this is wat i got... pi*(((2^5)/5)-(4(2^4)/4)+(4(2^3)/3)) its wrong so wat did i do wrong?:confused:

Homework Statement A constant-volume gas thermometer is calibrated in dry ice (that is, carbon dioxide in the solid state, which has a temperature of -80.0°C) and in boiling ethyl alcohol (78.0°C). The two pressures are 0.861 atm and 1.569 atm. (a) What Celsius value of absolute zero does...

it asks for it in pa that's y

no we haven't covered that so wat pressure wud i used for when its just about to break the surface of the water since i don't know exactly how deep it is? wud that just be 1 atm?

yes it is in kelvin...i got 419903.5 is that right?

Homework Statement An automobile tire is inflated with air originally at 10.0°C and normal atmospheric pressure. During the process, the air is compressed to 26.0% of its original volume and the temperature is increased to 32.0°C. (a) What is the tire pressure? Homework Equations...

Homework Statement At 24.0 m below the surface of the sea (density = 1025 kg/m3), where the temperature is 5.00°C, a diver exhales an air bubble having a volume of 1.20 cm3. If the surface temperature of the sea is 20.0°C, what is the volume of the bubble just before it breaks the surface...

why is this wrong...THRUST?? i showed work! Homework Statement A rocket for use in deep space is to have the capability of boosting a total load (payload plus the rocket frame and engine) of 2.25 metric tons to a speed of 10 000 m/s. If a different fuel and engine design could give an...

yes i checked it. i used 1 atm for the original pressure and then changed it to pa

Homework Statement An automobile tire is inflated with air originally at 10.0°C and normal atmospheric pressure. During the process, the air is compressed to 26.0% of its original volume and the temperature is increased to 32.0°C. What is the tire pressure? Pa Homework Equations...