【题目】 一道SAT数学题 A spherical balloon with radius r inches has v olum e V (r)=4/3mr^3. Find a function that r epresents th e amount of air required to inflat e th e balloon from a radius of r inches to a r adius of r+1 inches. ...
结果1 题目Water is flowing into a large spherical balloon of radius r and volume V.Utecnr ofna ucno ad 相关知识点: 试题来源: 解析 The volume of a sphere isV=4/3πr^3 Differentiating with respectto time r(dV)/(dt)=(dV)/(dr)*(dr)/(dt)(chsinm)le) (dV)/(dt)=4πr^2(dr)...
A spherical ball of radiusR=0.5mwith a volume charge density ofρ=3mCm3sitting inside of it has a very thin shell covering its surface with a surface charge density ofσ=1.2mCm2on it as shown in the below diagram. a)Wha...
一道关于角动量的题A uniform,spherical planet of mass M and radius R moves SLOWLY with an essentially uniform speed v through a cloud of interstellar dust particles,whose density is ρ.The dust particles are attracted towards the planet,and s
结果1 题目A uniform spherical shell of mass M :4.5 kg andradius R :8.5 cm can rotate about a vertical axis on frictionlessbearings( Fig.10-47)A.masslescso rd passesa roundt heequator of the shell,over a pulley of rotational inertia 1...
1. Determine the surface area of a sphere with a radius of 7 units. 2. What is its radius if a sphere’s surface area is 144π square units? 3. Find the sphere’s surface area with a diameter of 10 units. 4. A spherical balloon has a radius of 5 cm. Find the surface area of...
结果1 题目 Two thin spherical shells, one with radius R and the other with radius 2R, surround an isolated charged point particle. The ratio of the number of field lines through the larger sphere to the number through the smaller is:() A 1 B 2 C 4 D 1/2 E 1/4 相关知识点: ...
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