Question

A hollow sphere of inner radius 5.1 *cm* and outer radius
7.0 *cm* floats half submerged in a liquid of density 640
*kg*/*m*^{3}. What is the mass of the
sphere?

(in kg)

A: 4.60×10^{-1} |
B: 6.11×10^{-1} |
C: 8.13×10^{-1} |
D: 1.08 |
E: 1.44 |

**calculate** the density of the material of which
the sphere is made.

(in kg/m^3)

A: 5.22×10^{2} |
B: 7.57×10^{2} |
C: 1.10×10^{3} |
D: 1.59×10^{3} |
E: 2.31×10^{3} |

Answer #1

**given
ri = 5.1 cm = 0.051 m**

**ro = 7.0 cm 0.07 m**

**rho_liquid = 640 kg/m^3**

**let m is the mass of the sphere.**

**volume of the sphere, V = (4/3)*pi*ro^3**

**(4/3)*pi*0.070^3**

**= 1.44*10^-3 m^3**

**in the equilibrium, net force acting on the sphere =
0**

**Fnety = 0**

**B - m*g = 0 (here B is buyont force)**

**B = m*g**

**rho_liquid*(V/2)*g = m*g**

**==> m = rho_liquid*(V/2)**

**= 640*1.44*10^-3/2**

**= 0.460~4.60*10^-1 kg Answer**

**density of sphere = mass/effective volume**

**= 0.461/(4/3*pi*(ro^3 - ri^3))**

**= 0.461/(4/3*pi*(0.070^3 - 0.051^3))**

**= 522~5.22*10^2 kgm^3 Answer**

**I hope help you !!**

A hollow sphere of inner radius 8.71 cm and outer radius 9.79 cm
floats half-submerged in a liquid of density 898.00
kg/m3. (a) What is the mass of the
sphere? (b) Calculate the density of the material
of which the sphere is made.

A hollow, conducting sphere with
an outer radius of 0.260m and an inner radius of 0.207m has a
uniform surface charge density of +6.79

A hollow, conducting sphere with an outer radius of 0.260 m and
an inner radius of 0.200 m has a uniform surface charge density of
+6.47 × 10−6 C/m2. A charge of -0.400 μC is now introduced into the
cavity inside the sphere.
a)What is the new charge density on the outside of the
sphere?
b)Calculate the strength of the electric field just outside the
sphere
c)What is the electric flux through a spherical surface just
inside the inner surface...

A hollow, conducting sphere with an outer radius of 0.260 mm and
an inner radius of 0.200 mm has a uniform surface charge density of
+6.57 ×× 10−6−6 C/m2C/m2. A charge of -0.700 μCμC is now introduced
into the cavity inside the sphere.
What is the new charge density on the outside of the sphere?
Calculate the strength of the electric field just outside the
sphere.
What is the electric flux through a spherical surface just
inside the inner surface...

A hollow, conducting sphere with an outer radius of 0.260 m and
an inner radius of 0.200 m has a uniform surface charge density of
+6.37 × 10−6 C/m2. A charge of -0.700 μC is now introduced into the
cavity inside the sphere. a) What is the new charge density on the
outside of the sphere? b) Calculate the strength of the electric
field just outside the sphere. c) What is the electric flux through
a spherical surface just inside...

A hollow, iron sphere of inner radius 16 cm, outer radius 24 cm,
and emissivity 0.45 has a 750 gram block of ice at 0◦C suspended at
its center with a small drip pan underneath it.
(a) What must the temperature of the inside surface of the
sphere be for the ice to completely melt in 35 seconds?
(b) What must the temperature at the outer surface of the sphere
be for the inside temperature to be maintained during the...

3) If a hollow sphere has a volume of 49 m3 and the inner empty
space has a volume of 25 m3,
A) What is the outer radius?
B) What is the inner radius?
C) What is the outer surface area?
D) What is the weight of the sphere if the density is 0.917 ×
103 kg/m3
E) What is the sphere made of?

A hollow spherical iron shell floats almost completely submerged
in water. The outer diameter is 64.2 cm, and the density of iron is
7.87 g/cm3. Find the inner diameter.
Number
Enter your answer in accordance to the question statement
Units
Choose the answer from the menu in accordance to the question
statement

A hollow metal sphere has inner radius
a and outer radius
b. The hollow sphere has
charge
+2
Q. A point charge
+ Q sits at the center of the
hollow sphere.
A)Determine the
magnitude of the electric field in the region
r?a. (The correct answer does not
depend on:
Q, ??0, r.)
B) Determine the
magnitude of the electric field in the region
a<r<b
C)Determine the magnitude of the electric field in the
region
r?b
D)How much charge is...

A hollow metal sphere has inner radius a, outer radius b, and
conductivity σ. The current I is radially outward from the inner
surface to the outer surface. Part APart complete Find an
expression for the electric field strength inside the metal as a
function of the radius r from the center. Express your answer in
terms of the variables I, σ, r, and appropriate constants. E =
Iσ(4πr2) Previous Answers Correct Part B Evaluate the electric
field strength at...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 6 minutes ago

asked 18 minutes ago

asked 22 minutes ago

asked 54 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago