We WrK MATE X Consider The Fun × T Integral Calculate x G de ative of t gf Xye L

Question

We WrK MATE X Consider The Fun × T Integral Calculate x G de ative of t gf Xye LON CAPA A eo x 5mm tom Googl! × T angle calculator × C lon apa hep up medu/res fu capalibrary Ols pleMath/prob13.problem?symb loaded%2 pm?6219224476967e 45a20 pr 1%2fdefault 1483717968%2esequence 7 Luis M Sanabria Rios (Estudiante -sección: 021) 68 Fisica II Febrero2018 ing3172 Mensajes Cursos Ayuda Salin -oTimerNot as d Evaluate-Feedback elmprimire, info Contenido de Curso » ingseto1 » Area of a Sphere Area of a Sphere Puntos: 3 The surface area A of a sphere of radius R is given by the equation A = 4nR2 where n equals 3.1416 to 5 digits Calculate the area of a sphere which has a radius of 5 m Enviar Respuesta Tries o/s If 3400 grains of sand are uniformly spread out on the surface of the sphere, how many grains of sand are there on each square meter? Enviar Respuesta Tries 0/5 We now double the radius of the sphere, so that the new radius is 10 m. The 3400 grains of sand are uniformly spread over the surface. How many grains of sand do we now have on each square meter of the surface of the sphere? Enviar Respuesta Tries o/s This discussion is closed Enviar Reacción ye 2/20/2018

Explanation / Answer

According to the concept of the unit and dimensions

Given that

Radius r=5m

Now we find the area of the sphere

Area A=4r^2=4*3.14*5^2=314 m^2

Now we find the number of the grains in the sand

Number of grains N=3400/314=10.83 grains per m^2

Now we find the new area

Area A=4*3.14*10^2=1256 m^2

Number of grains n=3400/1256=2.71 grains per m^2

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