Recent content by ride4life

Homework Statement Evaluate the surface integral of G over the surface S S is the parabolic cylinder y=2x^2, 0=< x =<5, 0=< z =<5 G(x,y,z)=6x Answer is one of the following: 1. (15/8)*(401sqrt(401)-1) 2. (5/8)*(401sqrt(401)-1) 3. (15/8)*(401sqrt(401)+1) 4. (5/8)*(401sqrt(401)+1)...

Sweet! I have figured it out!

I understand the first equation, but instead of using cos, I had sin55 and sin25. But I don't understand your second equation...

Homework Statement A load Q is applied to the pulley C, which can roll on the cable ACB. The pulley is held in position shown by a second cable CAD, which passes over the pulley A and supports a load P. Knowing that P=750N, determine a) the tension in cable ACB and b) the magnitude of load...

Homework Statement a) Determine the momentum of a photon of light of wavelength 400nm. b) A mass of 1mg is being held up by a beam of 400nm light. How many photons per second would have to hit the mass (from below) to do this, assuming the photons bounce back with the same momentum as they...

a) i used kepler's third law with r=h+6.4x106, with h being the distance from the Earth's surface to the satellite and T=86400s ended getting 3.59x108m b) orbit above the equator would be a circle, elsewhere it would be an ellipse? c) geostationary satellites move at the same speed as the...

Homework Statement It is possible to put a satellite into an orbit so that it stays in a fixed position over a point on the Earth's equator (a geostationary or geosynchronous satellite). a) What would the be height of such a satellite above the Earth's surface? b) Why must such a satellite...

ahhh... i see what you mean, way less complicated than my way :biggrin:

centripetal acceleration = 2.44 ratio compared to Earth's g which is 9.8 is 2.44/9.8 which is about 1:4

ahhh... ac=GM/r2 ac=(6.67x10-11x6x1024)/(2x6.4x106)2 ac=2.44

v2=GM/r v2=(6.67x10-11x6x1024)/6.4x106 v=7907.67m/s

Ummm... Fc=Fg mac=Fg mac=mg ac=g ?

Homework Statement A satellite is orbiting the Earth in a stable orbit of which the radius is twice that of the Earth. Find the ratio of the satellites cepripetal acceleration to g on the Earth's surface. Homework Equations centripetal acceleration = (v^2)/r or (4rpi^2)/T^2 The...

Homework Statement When copper metal is placed in a beaker containing a solution of silver nitrate, a reaction occurs which can be represented by the following equation: 2AgNO3(aq) + Cu(s) -----> Cu(NO3)2(aq) + 2Ag(s) a) Give the net ionic equation to represent this reaction occurring...

Homework Statement a) Peter, with a mass of 80kg, was skating on a frozen lake with a velocity of 1m/s west. What was kis KE? b) After seeing the beatiful Margeret, Peter increased his velocity to 3m/s west over a distance of 10m. bi) What was his final KE? bii) What average force had to...