Consider a nanotube made of carbon atoms. What value do the inner and outer radius have if : - The specific surface area...
Consider a nanotube made of carbon atoms.
What value do the inner and outer radius have if :
- The specific surface area is 230 m²/g.
- The outer radius is twice the inner radius.
- The tubes are open so that the area is the sum of the inner and outer surfaces.
Homework Answers
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Consider a nanotube made of carbon atoms. What value do the inner and outer radius have if : - The specific surface area...
We have a tube made of carbon atoms. We know that the inner radius is half...
We have a tube made of carbon atoms. We know that the inner radius is half the value of the outer radius. If the specific surface is 100 m^2 / gram , what are the values of the inner and outer radii ?
3.21 Consider a hollow sphere with an inner radius of 5cm and outer radius of 6cm....
3.21 Consider a hollow sphere with an inner radius of 5cm and outer radius of 6cm. The inner surface is kept at 100°C, and the outer surface at 50°C. Determine the heat loss from the sphere if it is made of pure copper [k=387W/m.°C), pure aluminum [k=200W/m.°C), and pure iron [k=62W/m.°C]. Answer: 72.95kW, 37.7kW, 11.69kW
Consider a hollow metal sphere of inner radius r=16.5 cm and outer radius R-20.5 cm. The...
Consider a hollow metal sphere of inner radius r=16.5 cm and outer radius R-20.5 cm. The sphere is not charged, but there is a point charge of q-253 nC at the centre of the sphere (a) Calculate the charge density on the sphere's outer surface (b) Calculate the electric field strength at the sphere's outer surface. PAPER SOLUTION Solve the problem on paper first, including all four IDEA steps. You will become a better physicist that way! Have you finished...
to A very long cylindrical shell of inner radius a and outer radius 2a is made...
to A very long cylindrical shell of inner radius a and outer radius 2a is made of a conducting material of conductivity o= kr, where k is a constant and r is measured perpendicularly from the axis of the shell. A potential difference AV is applied across the inner and outer surfaces of the shell, with the inner surface at the higher potential. (a) What is the resistance dR per unit length of the cylinder, for a thin cylindrical shell...
Consider a neutral metallic spherical shell with outer radius 3R and inner radius 2R. A said...
Consider a neutral metallic spherical shell with outer radius 3R and inner radius 2R. A said metallic sphere of radius R and unknown charge is inserted inside the spherical shall. When this occurs, a charge of -3Q is found on the outer surface of the spherical shell. Explain how this charge is generated and what the uniform charge on the solid sphere must be. These two spheres are now connected together with a metal What charge will reside on each...
2) Consider a coaxial cable with the outer conductor radius of 8 mm and inner conductor radius of...
2) Consider a coaxial cable with the outer conductor radius of 8 mm and inner conductor radius of 4 mm. Assume a 100 MHz signal. (a) Calculate the parameters R L' G and C" assuming that the conductors are Cu and the space between them is filled with a dielectric material of&r-3 and ơ-103 S/m. (b) From the parameters in (a) determine a, B, up and Zo for the line. (c) How far would a signal travel in this line...
A panel is made from an air gap between inner and outer panel surfaces along n...
A panel is made from an air gap between inner and outer panel surfaces along n necessary plastic support as shown in the tollowing schematic. The air gap accounts for 90% of the cross-sectional area while the plastic supports. take 10% of the cross-sectional area. ED 1 " thick insulated space z 18" steel plates. - 1" plastic supports air, steel, plastic It is known the following conductivities for Kair = 0.01 Btu/hift of Ksteet = 26.2 Btu/hift. F K...
Q5. FORCE DUE TO INDUCED POLARIZATION A) Consider a very long (effectively infinite) half-cylinder of radius...
Q5. FORCE DUE TO INDUCED POLARIZATION A) Consider a very long (effectively infinite) half-cylinder of radius r and uniform surface charge density o. What is the magnitude and direction of the electric field at the center of the cylinder? B) Consider now a thin, long straight wire with uniform positive charge per length 2 at the center of a half-cylinder of inner radius a and outer radius b. The half-cylinder is made of a linear dielectric with susceptibility Xe. You...
1.A hollow spherical shell has an inner radius r1 and outer radius r2. It is made...
1.A hollow spherical shell has an inner radius r1 and outer radius r2. It is made of a material with density ?. Find the equation for its mass in terms of these three variables. 2.As we will learn, kinetic energy (K) has units kg•m2/s2. If we represent the mass of an object with m and its speed with v, we can write the kinetic energy as K = Ambv c, where A is a unitless constant. (a) What must the...
A spherical capacitor has a spherical inner plate with radius a and outer plate with radius...
A spherical capacitor has a spherical inner plate with radius a
and outer plate with radius b. The charge on the inner plate is +Q
and on the outer plate it is -Q. We have filled a cone shaped
region of angle θ (0 ≤ θ ≤ π) with a dielectric with constant κ.
The dielectric fills the entire volume between the two spheres
inside the cone. You may neglect any fringing effects between the
dielectric and the vacuum (dielectric...
3.21 Consider a hollow sphere with an inner radius of 5cm and outer radius of 6cm. The inner surface is kept at 100°C, and the outer surface at 50°C. Determine the heat loss from the sphere if it is made of pure copper [k=387W/m.°C), pure aluminum [k=200W/m.°C), and pure iron [k=62W/m.°C]. Answer: 72.95kW, 37.7kW, 11.69kW
Consider a hollow metal sphere of inner radius r=16.5 cm and outer radius R-20.5 cm. The sphere is not charged, but there is a point charge of q-253 nC at the centre of the sphere (a) Calculate the charge density on the sphere's outer surface (b) Calculate the electric field strength at the sphere's outer surface. PAPER SOLUTION Solve the problem on paper first, including all four IDEA steps. You will become a better physicist that way! Have you finished...
to A very long cylindrical shell of inner radius a and outer radius 2a is made of a conducting material of conductivity o= kr, where k is a constant and r is measured perpendicularly from the axis of the shell. A potential difference AV is applied across the inner and outer surfaces of the shell, with the inner surface at the higher potential. (a) What is the resistance dR per unit length of the cylinder, for a thin cylindrical shell...
Consider a neutral metallic spherical shell with outer radius 3R and inner radius 2R. A said metallic sphere of radius R and unknown charge is inserted inside the spherical shall. When this occurs, a charge of -3Q is found on the outer surface of the spherical shell. Explain how this charge is generated and what the uniform charge on the solid sphere must be. These two spheres are now connected together with a metal What charge will reside on each...
2) Consider a coaxial cable with the outer conductor radius of 8 mm and inner conductor radius of 4 mm. Assume a 100 MHz signal. (a) Calculate the parameters R L' G and C" assuming that the conductors are Cu and the space between them is filled with a dielectric material of&r-3 and ơ-103 S/m. (b) From the parameters in (a) determine a, B, up and Zo for the line. (c) How far would a signal travel in this line...
A panel is made from an air gap between inner and outer panel surfaces along n necessary plastic support as shown in the tollowing schematic. The air gap accounts for 90% of the cross-sectional area while the plastic supports. take 10% of the cross-sectional area. ED 1 " thick insulated space z 18" steel plates. - 1" plastic supports air, steel, plastic It is known the following conductivities for Kair = 0.01 Btu/hift of Ksteet = 26.2 Btu/hift. F K...
Q5. FORCE DUE TO INDUCED POLARIZATION A) Consider a very long (effectively infinite) half-cylinder of radius r and uniform surface charge density o. What is the magnitude and direction of the electric field at the center of the cylinder? B) Consider now a thin, long straight wire with uniform positive charge per length 2 at the center of a half-cylinder of inner radius a and outer radius b. The half-cylinder is made of a linear dielectric with susceptibility Xe. You...
A spherical capacitor has a spherical inner plate with radius a
and outer plate with radius b. The charge on the inner plate is +Q
and on the outer plate it is -Q. We have filled a cone shaped
region of angle θ (0 ≤ θ ≤ π) with a dielectric with constant κ.
The dielectric fills the entire volume between the two spheres
inside the cone. You may neglect any fringing effects between the
dielectric and the vacuum (dielectric...
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