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a hollow sphere of radius r is made of metal. That is, the volume of a sphere =. In order to reduce its weight, a conical hole is made in the cone as …. 7 A metal sphere of radius R is isolated in space. A hollow sphere of radius R is made of a metal whose specific gravity is rho. 5 mm and densities ranging from 0. In the Van de Graaff generator shown in Figure 16. Let us calculate the moment of inertia of a hollow sphere having a …. NCERT Exemplar Class 10 Maths Solutions Chapter 12 S…. The area of a cylinder is equal to the sum of the …. zero as r increases for r < R, decreases as r increases for r > R 4. A large hollow metal sphere of radius R has a small opening at the top. Torsional Vibrations of Coated Hollow Poroelastic Spheres. We will go through the explicit steps …. If V=4/3 π r 3, find, the value of V when r = 7, the value of r when V=113 1/7. The stress–strain relationship for uniaxial compression of a metal hollow sphere material in large strains is obtained using a simplified model for the spheres’ …. At the center of the cavity is an unknown point charge. Solution: Here radius of sphere = r = 7 mm. A small spherical ball is placed inside the bowl and is given a horizontal speed. However, because the moment of …. A metallic sphere of radius 10. A hollow metal sphere has inner radius a and outer radius b. An excess charge Q is deposited on each. How to Calculate the Volume of a Sphere: 5 Steps (with Picture…. The formula for the mass of a hollow cylinder is: M = π⋅ h⋅ (r2 − (r− t)2)⋅ mD M = π ⋅ h ⋅ ( r 2 - ( r - t) 2) ⋅ m D. Practice: What is the A 100 …. Instead of charge bulk density, we consider area density. A hollow metal sphere has 6 cm and 10 cm inner and outer radii, respectively. Hollow-sphere bilayer nanofilm-based ultraviolet light photodetectors made from ZnO and ZnS spherical nanoshells show …. A method for making a hollow metal sphere, the method comprising: (a) providing at least two opposing metal hemispheres each …. A 20 mm diameter copper sphere with an embedded electrical heater is to be suspended in a wind tunnel. Point P is a distance x from the centre of the sphere, as illustrated in Fig. A) Derive an expression for the electric-field magnitude in terms of the distance r from the center for the region r Two solids A and B float in water. In a second step, the hard template is removed (e. A solid cone of radius 5 cm and height 8 cm is melted and made into small spheres of radius 0. If the external radius of the base of the cylinder is 4 cm, its height 24 cm and thinkness 2 cm, find the value of ‘r’. The cylinder is melted down and made into a sphere …. The distance between centers is L, as shown in the …. According to the given condition, A hollow metal sphere of radius R is uniformly charged; These means let some charge Q be …. 1cm, h = Height of the cone = 8. The red circle has radius #R#, hence its equation is: # x^2+y^2=R^2 # Method 1 - Calculate core and subtract from Sphere. The capacitor is being charged by an external source. The threshold frequency for a certain metal is 3. It is inside a concentric hollow conducting sphere with inner radius b and outer radius c. Each hollow sphere has an outer radius R and a wall thickness t. hilbert2 said: If the sphere and the shell are made of metal (a conductor), the electrical potential is constant in them. Find the height and slant height of the cone. A R T I C L E I N F O A B S T R A C T Article history: Received 6 April, 2015 Accepted 10 October 2015 Available online 11 October 2015 This paper …. A nonconducting hollow sphere of inner radius 0. (a) Number Units (b) Number Units E Textbook And Media Attempts: 0 Of Jused Shit Arsen Usingle Stem Will …. ﬁeld here is directed toward the sphere, so that q must be negative. NEET 2019: Two metal spheres, one of radius R and the other of radius 2R respectively have the same surface charge density σ. The spheres are taken through the same …. Since the shot-putt is a solid sphere made of metal and its mass is equal to the product of its volume and density, we need to find the volume of the sphere. homework and exercises - Resistance of holl…. The Specialized Turbo combines speed and style through an …. The potential of the sphere becomes V ′ after N drops fall into it. A hollow sphere of inner radius 9 cm and outer radius 10 cm floats half submerged in a liquid of specific gravity 0. We assume that the charge on the sphere is $$Q$$, and so we follow the four steps outlined earlier. 35*10 6 N/C radially outward; Similar problems. How do you find the dimensions that will minimize the cost of metal to manufacture the …. A solid metal sphere has radius 9. The potential at a distance of 2cm from the centre of the sphere Option 1) Zero Option 2) 10 V Option 3) 4 V Option 4) 10/3 V. In order to minimize the size effect …. Gauss S Law Questions and Answers. The ratio of the area of metal sheets required for …. Moment of Inertia, Sphere. 00 cm is concentric with a spherical conducting shell of inner radius b = 2. Determine the outer radius of the sphere and wall thickness, if you know that the weight of the sphere is 0. A particle of mass 2 kg is moving in a horizontal circle of radius I m on a smooth horizontalsurface A rectangular coil of length 0. Find the number of spheres formed. One major factor in deep drawing is the die corner radius and the punch corner radius. A solid non conducting sphere of radius R has a non-uniform charge distribution of volume charge density, rho=rho_ (0)r/R, where rho_ (0) is a constant …. An excess charge O is deposited on each Which object has the greatest surface charge density O the solid metal sphere O the hollow metal This problem has been solved! See the answer Show transcribed image text Expert Answer 100% (16 ratings). A hollow spherical shell of radius 3R placed concentric with the first sphere has net charge - Q. 50 μC rests at the very center of the cavity, …. Andynitrox gives a great answer, but it sounds like you are considering a ramp to be equipment. where R is the radius of the original sphere (a quantity we do not know). A point charge q is placed at origin. The electric field of a conducting sphere with charge Q can be obtained by a straightforward application of Gauss' law. For an isolated metal sphere, the potential at the surface is V = kQ=R, while the electric field strength at the surface is kQ=R 2 = V=R. 1 The forces acting on the ball are its weight W and the normal reaction force R of the bowl on the. A hollow metallic Sphere with external diameter8cm and internal diameter 4cm is melted… A metallic cone having base radius 2. The Density of a Sphere calculator computes the density a sphere (ρ) based on the radius (r) of the sphere and the mass (M). TSA hemisphere=2πr2+πr2=3πr2 · r · Let R and r be the external and internal radii of a hollow sphere. If the inner surface is polished, we have a concave mirror. The sphere will float in water if: · t≤ρR​ · t≤3ρR​ · t≤2ρR​ · t≥3ρ . Let the outer and the inner radii of the sphere be 'R' cm and 'r' cm respectively. 6 14 r 2 r NOT TO SCALE The sphere of radius r fits exactly inside the cylinder of radius r and height 2 r. The hollow sphere has a charge of +2Q. Therefore, the volume of this iron sphere will be equal to the volume of 27 solid iron spheres. Capacitance of the hollow sphere is 4πɛ0R. Hollow sphere The steel hollow sphere floats on the water plunged into half its volume. The total surface area of a cube is 96 cm2. = Sphere (shell) of radius r 2 and mass m, with centered spherical cavity of radius r 1. Compare the densities of A and B:. In this study, a simple inexpensive gas sensor, which uses [email protected] hollow sphere hybrid films, is prepared with different mole …. Determine the outer radius of the sphere and wall thickness, if you know that …. A spherical sector is a solid of revolution enclosed by two radii from the center of a sphere. The sphere will float in water if thickness of wall of the sphere is (thickness of the wall <3pR B =3p3R C <3pR D <3p4R Medium Open in App Solution Verified by Toppr Correct option is A) Was this answer helpful? 0 0 Similar questions. The electric field at the centre of the sphere will be :- (1) …. Hemi means half, so the volume of half of a sphere (hemisphere) is just half the volume V of a sphere. of metal is small , the volume of metal is almost 4*pi R^2 * e Density of metal is dm and …. increases as r increases for r < R and for r > R 3. The thickness of each ring is dr, with length L. To calculate the mass of a sphere, start by finding the sphere's volume using the formula: V = 4 over 3 × πr cubed, where r is the radius of the …. If the density of the metal is 10. The thickness of the hollow metal sphere is 20 cm. Three flat objects (circular ring, circular disc, and square loop. cm 3 and cm) and radius in is …. By symmetry, the electric field must point radially outward, so outside of the rod, Gauss' law gives. The electric field at a point P, a distance of 15. decreases as r increases for r < R and for r > R 2. The square oak board (with density ρ = 700 kg/m 3) has a side length of 50 cm and a thickness of 30 mm. 0 cm and a concentric metal spherical shell has an inside radius of 10. A solid sphere of radius ‘r’ is melted and recast into a hollow cylinder of uniform thickness. Let the inner and outer radii of the hollow cylinder are ‘r’ and ‘R’ cm. After some simple algebraic transformations, with the above equations, we can finally write six …. If a solid metallic sphere of radius 8 cm is melted and recasted into n sphere solid balls of radius 1 cm, then n= (a)500 m (b)510 cm (c)512 cm (d)516 cm 14. The A hollow metal sphere has inner radius a and outer radius b. 00 cm; the surface of the hollow passes through the center of the sphere and “touches” …. 2m the thickness of the metal is tcm the mass of the 3D shape is 1980kg the density of the metal is 2700kg/m^3 first find the volume of the holo part of the sphere, 4/3 pi r^3, and times this by the density, now you know what the internal part should. The ball follows a horizontal circular path of constant radius, as shown in Fig. Using Gauss' law to find E. Part A Determine the magnitude of the electric field in the region r≤a. A hollow sphere of radius R, a hollow cube of side R and a thin circular plate of radius R, made up of the same material, are all heated to 20°C above . ∴ Volume of copper used in making the pipe = π A cylindrical tube, open …. = 4 x (22/7) x 7 x 7 = 616 mm2. The radius of the neck is given by r b; the angle subtended by the neck is 2θ. If the density of the metal is 8. A hollow sphere of inner radius R and outer radius 2 R is made of a material of thermal conductivity K. The moment of inertia of a hollow sphere would be higher than a solid sphere of equal radius, only if the unmentioned assumption (same mass) is true! This is typically untrue, because of another assumption, that the hollow and solid spheres (of equal radius) are made of the same density material. A hollow sphere of internal and external radii 6 cm and 8 cm respectively is melted and recast into small cones of base radius 2 cm and height 8 cm. The initial voltage on sphere 1 then was: V initial= kQ=r 1. 2 cm is melted and recast into the shape of a cylinder of radius 6 cm. • Use a concentric Gaussian sphere of radius r. For rgtc, the direction of electric field is …. Cylindrical coordinate axes (r, ,z) are assumed for FGM cylinder that refer to radial length, polar angle, and axial …. A solid insulating sphere of radius R has a nonuniform charge density that varies with r according to the expression ( = Ar2, where A is a constant and r < R is …. A hollow sphere of internal and external radii 2 cm and 4 cm respectively is melted into a cone of base radius 4 cm. 20 cm is supported on A metal sphere with radius ra = 1. As observed the depth reached by the center of the sphere is not altered at a significant level due to increase in mass for respective cases. Total resistance: R = ∫ a b ρ d r 4 π r 2 = ρ 4 π ( 1 a − 1 b) Incidentally you can see that if a goes to zero, this resistance becomes infinite - just as it does when the contact surface of the point is truly a "point" as it appears to be in your question. Therefore, pressure is inversely proportionate to the radius size. Open Access proceedings Journal of Physics: Conference series. Question: A sphere of radius a is made of a nonconducting material that has a uniform volume charge density. Inner radius of a hollow sphere (r) = 6 cm weight, a conical hole is and outer radius (R) = 8 cm made in the cone aS 4 shown and completely filled with …. By melting a solid lead sphere of diameter 12 cm three small spheres are made whose diameters are in the ratio 3 : 4 : 5. We note that the electric r = 0. It is surrounded by another hollow sphere of inner radius 2R and outer radius 3R made of the same material of thermal conductivity K. The formula for the mass of a sphere: M = 4/3⋅π⋅r³⋅mD. Join the bowls rim-to-rim by winding black electrical tape around the rim several times. Given height of the cylinder = 28 cm. It is made up of a huge metal sphere that is supported by high insulating supports. The spheres are taken through …. The distribution of charge is as shown in figure. A hollow sphere is a ball that has been hollowed such the an equal thickness wall creates anopther internal ball within …. , where R is the radius of the sphere. The outer surface of the larger shell has a radius of 3. 30 secApply a debuff to enemies in front of you which deals chaos damage over …. theta = (90 - L) * pi/180 The radius of the circle that is the cross-section of the sphere is r_c = r*sin(theta) You can see this if you take another …. A hollow spherical shell is made up to a metal of density 3 g/cm 3. That given point is the centre of the sphere, and r is the sphere's radius. The sphere will float in water if thickness of wall of the sphere is (thickness of the . A hollow sphere of metal has an internal radius of 1. Given, radius of hemispherical bowl, r = 9 cm and radius of cylindrical bottles, R = 1. Considering a Gaussian surface in the form of a sphere at radius r, the electric field has the same magnitude at every point of the sphere and is directed . 0 5 10 15 E / 105 V m-1 x / cm 20 0 2 4 6 8 10 12 Fig. Homework help starts here! Science Physics Q&A Library Two spheres are made of the same metal and have the same radius, but one is hollow and the …. We have,r = Radius of the base of the cone = 2. the two spheres remain of equal size. This nearly ancient formula is still the easiest way to determine the surface area of …. Question: Are the forces of repulsion on the northern hemisphere a result of only the charges from the southern hemisphere while there is …. A thermocouple inside the sphere …. ∵ Curved surface area of sphere = 4π × (radius) 2. What is the volume of a sphere with radius is 1 millimeter?. A hollow iron pipe is 21 cm long and its external diameter is 8 cm. A Dyson sphere is a hypothetical megastructure that completely encompasses a star and captures a large percentage of its solar power output. Electric potential of a charged sphere. Question 17: A solid right circular cone of height …. Difference between outer and inner …. Total resistance: R = ∫ a b ρ d r 4 π r 2 = ρ 4 π ( 1 a − 1 b) Incidentally you can see that if a goes …. A solid rectangular block of metal 49cm by 44cm by 18cm is melted and formed into a solid sphere find the radius ofthe sphere? 54. The interior gas will have a radius of R and density & rho; ~ 1 ~. Calculates the volume and surface area of a sphere given the radius. Turn the Van de Graaff generator on for five to ten seconds to …. -37 shows a spherical hollow inside a lead sphere of radius R = 4. A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 10 V. solid sphere made of insulating material has a radius R and has a total charge Q distributed uniformly in its volume. Calculate volume of a hollow cylinder and its surface area. The surface charge density on the inside surface is -100 nGm 2. and radius of hemi-sphere = r ∴ Surface area = 3πr 2 ∵ Their surface area are equal 4πR 2 = 3πr 2 ⇒ 4R 2 = 3r 2. The first (and simple) thing to calculate is the buoyancy force. We have shown that an interfacial layer of hollow carbon nanospheres allows stable Li metal anode cycling up to a practical current …. 5 kg and the density of steel is 7850 kg/m 3. Let's say you have a model globe with a …. ©2009 F H Brundle Registered to ISO 9001:2015. Each sphere holds an excess charge Q. 224, , MATHEMATICS, , Therefore, Curved Surface Area of a Hemisphere = 2π, πr 2, where r is the radius of the sphere of which the …. A probe measures the electric field strength at various points …. 2 Gauss’s Law Consider a positive point charge Q located at the center of a sphere of radius r, as shown in Figure 4. Now, to solve such problem we need to use the right formula which is; I = (2/3)MR 2 We will substitute the values, I = (2/3) (55. Determine the magnitude of the electric field in the region rb. We made it much easier for you to find exactly what you're looking for on Sciemce. If the external radius of the base of the cylinder is 4 cm, its height …. A hollow glass sphere is evacuated to a high vacuum and filled with a small amount of Neon gas at a pressure of about 1 millitor. The formula for the volume of a sphere is (4/3) * pi * (r * r * r), where r represents the radius. A sphere of maximum volume is cut out from a solid hemisphere of radius 6 cm. a) ring b) solid sphere ( c) hollow sphere (d) disc Ans: 24. Volume of metal used = 4/3pi(R^3 - r^3) = 4/3 xx 22/7 xx (6^3 - 4^3) = 4/3 xx 22/7 xx 152 = 636. A thin spherical shell of radius 2 made of R glass carries a uniformly distributed negative charge - 2Q. ically anisotropic sphere made of the material which is at any point transversely isotropic around the radial direction. If the length of radius of a sphere is increased by 50%, let us write how much percent will be increased of its curved surface area. A cylindrical can is to be made to hold 1000cm^3 of oil. Which object has the greatest surface charge density? a) the solid metal sphere b) same in both cases c) the hollow metal spherical shell b) Sets found in the same folder Ch 17 - Electrostatics 2 12 terms amazingmamamia13. 2), the total amount of adhesive in a sphere is: (2) V T_ad = 6. Outer radii of the hollow sphere = r 2 Consider an imaginary sphere of radius x. A solid sphere of radius R and a hollow sphere of inner radius R/2 and outer radius R, made of copper ,are heated to the same temperature and are allowed …. Let R /R2 be the ratio of the internal radius of the charge to the external radius of the charge. Gold has a density of 19 000 kg/m 3 Silver has a …. 27 solid iron spheres are melted to form 1 iron sphere. Radius of 2nd sphere =r 2 = 8 cm and Radius f third sphere = r 3 = 10 cm Let radius of the resulting sphere = R Now, Volume of resulting sphere = Volume …. Hollow Metal Sphere | Chegg; Hollow Metal Sphere Has Inner Radius; A hollow charged metal sphere has; 23. 29 Two metal spheres, one of radius R and the other of radius 2R, …. The electric field due to the sphere at a distance r from the centre: 1. It is melted and recast into a sphere. where r is the radius of the base, R is the radius of the sphere, and h is the height of the spherical cap EX: Jack really wants to beat his friend James in a game of …. Therefore, 512 balls can be made of radius 1 cm each with a solid sphere of radius 8 cm. by imagining a sphere of radius x. See below Surface Areas and Volumes Class 9 Mathematics MCQ Questions, solve the questions and compare your answers with the …. CHAPTER 25 ELECTRIC POTENTIAL. A unit mass is placed at a distance from the centre of metal sphere. A hollow sphere of radius R is made of metal whose specific gravity is ρ. A point charge +Q sits at the center of the hollow sphere. A metal sphere with radius $r_{a}$ is supported on an insulating stand at the center of a hollow, metal, spherical shell with …. Problems Based on Conversion of Solids. A negatively charged ( ) sphere whose size and position match the cavity (Fig. Positive electric charge Q is distributed uniformly throughout the volume of an insulating …. where: M = mass of the hollow …. The volume of one sphere is 27 times that of another sphere. A hollow metal sphere has a radius R and a charge +Q placed on it. If the outer surface is polished, we have a convex mirror. Selina Concise Mathematics Class 10 ICSE Solutions Chapte…. Surface Area of a Sphere Calculator. A hollow sphere of external radius R and thickness t (< < R) is made. Hollow sphere of radius r and mass m. A Metal Sphere With Radius R Is; A hollow metal . Find a) the potential inside the sphere; Hence, for qinside the hollow sphere, the potential is also given by (1). Volume of Hollow Sphere Equation and Calculator. The three different geometrical parameters which characterise a hollow-sphere stacking are: (i) the outer radius of the hollow …. where we looked up the radius of Mars R= 3:40 106 m. The distance between the center of the plastic ball (location A) and the center of the glass sphere (location C) is. At the center of the hollow space inside the shell there is a very small sphere that has charge q2=+3. The main geometric parameters include the hollow sphere radius R m, wall thickness t, opening or hole diameter d m, and distance d between adjacent hollow spheres. The interior gas will have a radius of R and density ρ~1~. So, the volume is calculated as the. 90% (10 ratings) Answer: The solid metal sphere Reason: The metallic sphere is a condu …. A hollow metal cylinder has inner radius a, outer radius b, length L, and inside the metal as a function of the radius r from the cylinder's axis. A solid sphere of radius R has a spherical cavity of radius r as shown in the figure. It holds a charge, Q, which is distributed evenly throughout the sphere and gives it a uniform …. A solid metallic cone, with radius 6 cm and height 10 cm, is made of some heavy metal A. Give your answer as a multiple of Q/ε0. Consider a Gaussian cylinder with r as radius and with r R we have B out = B 0 + (μ 0 …. Electric Field Of Charged Spherical Shell | O…. A hollow sphere of external radius R and thickness t ( ≪ R) is made of a metal of density ρ, sphere will float in waterif. The gravitational field at that point is CLASSES AND TRENDING CHAPTER class 5. For a fixed pellet radius of r p = 1 mm and fixed pedestal conditions as in figure 2, (top) the mass deposition (in 10 22 m −1) as a function of Li or B …. A hollow cylinder with rotating on an axis that goes through the center of the cylinder, with mass M, internal radius R 1, and external radius R 2, has a moment of inertia determined by the formula:. A capacitor is made of two concentric spherical …. The current I is radially outward from the inner surface to the outer surface. Example 8 A cone of height 24 cm and radius of base 6 cm is made up of modelling clay. Reason (R): If three solid metallic spherical balls of radius 3 cm, 4 cm and 5 cm are melted into a single spherical ball, then its radius is 6 cm. Here's my take on it:-- Volume of a sphere is 4/3 pi R3-- Volume enclosed by the outer radius is 4/3 pi (2)3-- Volume enclosed by the inner …. The spheres are taken through the same temperature increase. Outside of sphere: Logically, the charge outside of a sphere will be always on the Gaussian surface and it doesn't change, therefore the …. Answer: b Clarification: Outer radius r o = 4cm Inner radius r i = outer radius - thickness = 4 - 3 r i = 1cm. Hollow Right Circular Cone Suppose a sector of a circle is folded to make the radii coincide, then we get a hollow right circular cone. Purchase two metal mixing bowls. Answer: * Let the hollow metal ball (sphere- hollow) with the external radius of R and internal radius of r. What is the mass of the sphere? You need to find the volume of the shell since it's hollow. A thin spherical shell of radius R2 made of glass carries a uniformly distributed positive charge +Q2. Have you registered for the PRE-JEE MAIN PRE-AIPMT 2016? Paper by Super 30 Aakash Institute, powered by embibe analysis. Or put another way it can contain the greatest volume for a fixed surface area. Which of them starts cooling faster? A. A metal sphere with radius $r_{a}$ is supported on an insulating stand at the center of a hollow, metal, spherical shell with radius $r_{b}$. Surface Area and Volume Class 10 Worksheet PDF Download. A theoretical approach to the elastic behaviour of compact an…. A metal sphere with radius r is supported on an insulating stand in the center of a hollow metal spherical shell of radius b. Physics, Gravitation (Floatation), a hollow sphere of external radius r and thickness t r is made of a metal of density rho the sphere will . ms = 4πR2 × t × ρ m s = 4 π R 2 × t × ρ. Calculate the percentage of the cylinder occupied …. For instance, if a sphere of radius R is uniformly charged with charge density {\rho }_{0} then the distribution has spherical symmetry ((Figure)(a)). This diagram shows a solid metal cylinder. Assignments For Class 10 Surface Area and Volume. According to the given condition, A hollow metal sphere of radius R is uniformly charged. The volume, V, of a sphere of radius r is given by V = f(r) = 4pi(r^3) / 3. The electric flux through a sphere of radius r, centered on the origin, is equal to. SiO 2 via dissolution in HF, polymers via thermal combustion) with the shell remaining …. When the cavity radius r 1 = 0, the object is a solid ball (above). Internal radius of a hollow sphere (r) = 2 cm and external radius (R) = 4 cm ∴ Volume of the metal used. A hollow sphere is made up of lead of radius R with its hollow surface touching the outside surface and passing through the centre. The radius of a sphere is 2r, then its volume will be (A) 3 4 3 πr (B) 4πr3 (C) 8 3 3 πr (D) 3 32 3 πr 2. The capacitance of a charged sphere whose radius is r is given by: C = 4ε 0 pr. How many spherical bullets each of 5 cm in …. The diameter of two hollow spheres made from the same , metal sheet are 21 cm and 17. $\begingroup$ The sphere in the question is solid, but think of it as being made up of many hollow concentric spherical shells, each shell …. The other is made of higher density material, but since having the same mass and …. The field will push the positive …. Calculate the capacitance of a single isolated conducting sphere of radius …. Electric Charge Questions and Answers. * {Let r2= R; r1= r} * The difference of volume of …. The cylinder hasbase radius 2x and height 9x. Metal spheres made by the method of the invention are substantially uniformly symmetrical in their mass distribution, and can provide superior performance in applications, such as golf ball cores and. The cylinder is melted down and made into a sphere of radius r Find an expression for in terms of x. RD Sharma Solutions For Class 10 Maths Chapter 16 Surface Ar…. If the internal and external radii are 5 cm and 6 cm respectively, then what is the …. a solid sphere = a hollow sphere > a disk. Enjoy our search engine "Clutch. For this object, it’s going to have two parts—the outer shell and the interior gas. a) Determine the electric field at all …. Oil is poured into it at the rate of 15 cm3 /s. The hollow sphere has no net charge. The water is poured into a hollow cone. The mass and volume of the rope can be neglected. A hollow metal cylinder has inner radius a, outer radius b, length L, and conductivity sigma.