# he question is: A spherical capacitor contains a solid spherical conductor of radius 0.5mm with a charge of 7.4 micro coulombs, surrounded by a dielectric material with er = 1.8 out to a radius of 1.2mm, then an outer spherical

42,992 questions
1. ## physics

he question is: A spherical capacitor contains a solid spherical conductor of radius 0.5mm with a charge of 7.4 micro coulombs, surrounded by a dielectric material with er = 1.8 out to a radius of 1.2mm, then an outer spherical non-conducting shell, with

asked by Josh on May 1, 2011
2. ## Physics

Four objects - a hoop, a solid cylinder, a solid sphere, and a thin, spherical shell - each has a mass of 4.59 kg and a radius of 0.252 m. (a) Find the moment of inertia for each object as it rotates about the axes shown in the table above. hoop____ kg·m2

asked by Ana on March 19, 2010
3. ## Physics

A spherical conductor has a radius of 4mm. What is the volume of this conductor in liter? Note: v= 4/3Πr3 where r = radius *pie na and exponent na ang 3

asked by Ydnew on August 16, 2016
4. ## Physics

A spherical conductor has a radius of 4mm. What is the volume of this conductor in liter? Note: v= 4/3 pie exponent of 3 where r = radius

asked by Ydnew on August 16, 2016
5. ## PHYSICS

A capacitor consists of a solid metal sphere of radius 3 cm placed at the center of a thin metal spherical shell of radius 12 cm. The space between is empty. What is the capacitance?

asked by Kara on February 20, 2011
6. ## Maths

if a spherical medicine with radius r is broken down in to 1000 spherical small tablets then the css of original spherical medicine will become---- times

asked by Sanjay on November 22, 2017
7. ## physics

The capacitance of a spherical capacitor with inner radius b and outer radius a. Suppose a is fixed. What is radius b in terms of a such that the capacitor can store a maximum amount of energy , assuming that the electric field strength at the surface of

asked by lam on October 4, 2012

A spherical capacitor consists of a spherical conducting shell of radius b and charge -Q concentric with a smaller conducting sphere of radius a and charge +Q . Enter an expression for the capacitance of this device in terms of Coulomb's Constnat K_e (just

asked by asha on November 6, 2013
9. ## Physics

A particle with a charge of -60.0 nC is placed at the center of a nonconducting spherical shell of inner radius 20.0 cm and outer radius 33.0 cm. The spherical shell carries charge with a uniform density of -2.02 µC/m3. A proton moves in a circular orbit

asked by Danielle on April 14, 2011
10. ## physics

Consider a coaxial cable with 2Amps in the center conductor coming out of the page, and 1Amp in the outer conductor going into the page. The center conductor has a radius of 1mm, the outer conductor's inner radius is 2mm, and the outer conductor's outter

asked by mike on April 7, 2014
11. ## physics

Consider a coaxial cable with 2Amps in the center conductor coming out of the page, and 1Amp in the outer conductor going into the page. The center conductor has a radius of 1mm, the outer conductor's inner radius is 2mm, and the outer conductor's outter

asked by Anonymous on April 6, 2014
12. ## physics HELP

Consider a coaxial cable with 2Amps in the center conductor coming out of the page, and 1Amp in the outer conductor going into the page. The center conductor has a radius of 1mm, the outer conductor's inner radius is 2mm, and the outer conductor's outter

asked by dalton on April 7, 2014
13. ## physics

Consider a coaxial cable with 2Amps in the center conductor coming out of the page, and 1Amp in the outer conductor going into the page. The center conductor has a radius of 1mm, the outer conductor's inner radius is 2mm, and the outer conductor's outter

asked by roger on April 6, 2014
14. ## Differential equation

A spherical balloon remains spherical as it is slowly inflated. The radius of the balloon r (in cm) at time t (in seconds) satisfies the differential equation. Dr/dt = k/r^2 where k is a positive constant. When the radius is 3 cm, the radius is increasing

asked by Anon on February 19, 2017
15. ## physics

A uniform solid cylinder of radius R and a thin uniform spherical shell of radius R both roll without slipping. If both objects have the same mass and the same kinetic energy, what is the ratio of the linear speed of the cylinder to the linear speed of the

asked by saud on December 5, 2011
16. ## Calc

The sun is shining and a spherical snowball of volume 210 ft3 is melting at a rate of 14 cubic feet per hour. As it melts, it remains spherical. At what rate is the radius changing after 3 hours? I posted this question before and when i went back and did

asked by Bubba on February 14, 2011
17. ## physics

A spherical shell is formed by taking a solid sphere of radius 20.0 cm and hollowing out a spherical section from the shell's interior. Assume the hollow section and the sphere itself have the same center location. a) If the hollow section takes up 90% of

asked by chris on September 2, 2014
18. ## Physics

Consider a conducting spherical shell with inner radius b = 0.862 m and outer radius c = 1.21 m. There is a net charge q2 = 3.82 ìC on the shell. At its center, within the hollow cavity, there is a point charge q1 = 2.89 ìC. Determine the flux through

asked by Alicia on March 20, 2011
19. ## Physics

A disk and a hollow spherical shell, like a basketball, are released at the same time at the top of an inclined plane. The spherical shell has a mass M and a radius R; the disk has a mass 2M and a radius 2R. If the two objects are released at rest, and the

asked by Ree on November 24, 2010
20. ## Science

I need some help with these questions. Why is there no electric field at the center of a charged spherical conductor? Does an electric field exist within a charged spherical conductor at points other than its center?

asked by Cam on November 5, 2007
21. ## INTRO TO PHYSICS

Each of the following objects has a radius of 0.174 m and a mass of 2.16 kg, and each rotates about an axis through its center (as in the table below) with an angular speed of 37.3 rad/s. Find the magnitude of the angular momentum of each object. >Hoop of

asked by Sandy on October 31, 2012
22. ## physics

Calculate the capacitance of a planet, assuming it is a spherical capacitor of radius R = 9050.0 km with charge distributed throughout the volume of the sphere.

asked by titu on April 26, 2015
23. ## physics

1. Does an electric field exist within a charged spherical conductor at points other than its center? 2. Why is there no electric field at the center of a charged spherical conductor?

asked by beauty on January 24, 2011
24. ## physics

Question 6) Oil and gas exploration companies find new underground deposits by measuring (with incredible precision) the value of g at the Earth's surface. EXTRA INFO GIVEN: The challenge: F=Gm1m2/r^2 ONLY works for two cases: point masses, or if one of

asked by katie bornia on October 22, 2016
25. ## algebra

Sara goes on a slingshot ride in an amusement park. She is strapped into a spherical ball that has a radius of centimeters. What is the volume of air in the spherical ball?

asked by jenna on January 5, 2016
26. ## maths

If a spherical medicine with radius R is broken down into 1000 spherical small tablets then the surface area of original medicine will become ----------times. Please show method how to do

asked by sanjay on December 16, 2016
27. ## physics HELP MEEE SO CONFUSED

A spherical conductor has a radius of 14.0 cm and charge of 26.0 µC. Calculate the electric field and the electric potential (a) r = 10.0 cm, (b) r = 20.0 cm, and (c) r = 14.0 cm from the center.

asked by confused on February 7, 2012
28. ## Physics

A coaxial transmission line has a solid inner conductor of radius a and a thin-walled outer conductor of radius b. The medium between the conductors has permeability (Mu)0. Find the inductance per meter of length of the line (a) if all current of the inner

asked by sandhu on March 23, 2011
29. ## calc

The sun is shining and a spherical snowball of volume 210 ft3 is melting at a rate of 14 cubic feet per hour. As it melts, it remains spherical. At what rate is the radius changing after 3 hours?

asked by Bubba on February 14, 2011
30. ## physics

An irregularly shaped chunk of concrete has a hollow spherical cavity inside. The mass of the chunk is 32kg, and the volume enclosed by the outside surface of the chunk is 0.020m^3. What is the radius of the spherical cavity? To solve this, you need to

asked by Cavin on April 8, 2007
31. ## Physics gravity

A thin spherical shell has a radius of 2.4 m and a mass of 410 kg, and its center is located at the origin of a coordinate system. Another spherical shell with a radius of 1 m and mass 135 kg is inside the larger shell with its center at 0.6 m on the x

asked by Chel on April 8, 2013
32. ## physics

A conducting spherical shell with a total charge of +12.6 micro-coulombs has a point charge of -3.6 micro-coulombs placed at its center. The negative point charge will push the electrons in the spherical shell away from it. This will leave the inner shell

asked by Mandaleigh on February 10, 2012
33. ## Physics

A 50-kg person starts from rest at the top of a large frictionless spherical surface (radius 6 m) and slides into the water below. What is the magnitude of the normal force she experiences halfway along the spherical surface (at theta = 45 degrees as

asked by Charlie on April 23, 2012
34. ## physics

(1)A parallel-plate capacitor carrying charge q0 is modified by the insertion of a dielectric with κ = 4.3 between the plates. As a consequence, the energy stored in the capacitor quadruples. What will the charge be after the dielectric is inserted? (2)A

asked by Sandhya on February 21, 2010
35. ## physics

The basic function of the carburetor of an automobile is to atomize the gasoline and mix it with air to promote rapid combustion. As an example, assume that 31.0 cm3 of gasoline is atomized into N spherical droplets, each with a radius of 8.00 10-5 m. What

asked by neeba on September 13, 2012
36. ## physics

A spherical conductor has a radius of 14.0 cm and charge of 26.0 µC. Calculate the electric field and the electric potential (a) r = 10.0 cm, (b) r = 20.0 cm, and (c) r = 14.0 cm from the center. how do i calculate k?

asked by confused on February 7, 2012
37. ## Physics

Small, slowly moving spherical particles experience a drag force given by Stokes’ law: where r is the radius of the particle, is its speed, and ç is the coefficient of viscosity of the fluid medium. (a) Estimate the terminal speed of a spherical

asked by Maggie on September 29, 2010
38. ## physics

Small, slowly moving spherical particles experience a drag force given by Stokes’ law: where r is the radius of the particle, is its speed, and η is the coefficient of viscosity of the fluid medium. (a) Estimate the terminal speed of a spherical

asked by mike on February 19, 2010
39. ## physics

Small, slowly moving spherical particles experience a drag force given by Stokes’ law: where r is the radius of the particle, is its speed, and η is the coefficient of viscosity of the fluid medium. (a) Estimate the terminal speed of a spherical

asked by katie on February 19, 2010
40. ## Physics

A capacitor consists of two concentric spherical shells. The outer radius of the inner shell is a=0.43 mm and the inner radius of the outer shell is b=2.2 mm . (a) What is the capacitance C of this capacitor? Express your answer in Farads. incorrect (b)

asked by P on March 12, 2013
41. ## physics

Each of the following objects has a radius of 0.169 m and a mass of 2.02 kg, and each rotates about an axis through its center (as in this table) with an angular speed of 38.6 rad/s. Find the magnitude of the angular momentum of each object. (a) a hoop kg

asked by alba on March 8, 2015
42. ## Physics

Small, slowly moving spherical particles experience a drag force given by Stokes' law: Fd = 6πηrv where r is the radius of the particle, v is its speed, and η is the coefficient of viscosity of the fluid medium. (a) Estimate the terminal speed of a

asked by Dalton on February 1, 2017
43. ## physics

spherical aluminum ball of mass 1.22 kg contains an empty spherical cavity that is concentric with the ball. The ball just barely floats in water.Calculate the radius of the cavity.

asked by jenna on October 5, 2010
44. ## physics

A capacitor consists of two concentric spherical shells. The outer radius of the inner shell is a=0.76 mm and the inner radius of the outer shell is b=3.31 mm . (a) What is the capacitance C of this capacitor? Express your answer in Farads. unanswered (b)

asked by s on March 6, 2013
45. ## Chemistry

At room temperature, the surface tension of water is 72.0 mJ·m^–2. What is the energy required to change a spherical drop of water with a diameter of 1.80 mm to three smaller spherical drops of equal size? The surface area of a sphere of radius r is

asked by Anonymous on November 13, 2012
46. ## Chemistry Help

At room temperature, the surface tension of water is 72.0 mJ·m^–2. What is the energy required to change a spherical drop of water with a diameter of 1.80 mm to three smaller spherical drops of equal size? The surface area of a sphere of radius r is

asked by Anonymous on November 17, 2012
47. ## physics

A charge q1 is inside a spherical surface (although not necessarily at the exact center of the sphere). A second charge q2 sits just outside the surface. Choose whether the following statements are true or false. T/F The total electric flux through the

asked by Samantha on March 6, 2015
48. ## PHYSICS

Determining how the charges distribute on the surface of a conductor is, in general, a very difficult problem. We know that if we charge a conductor the charges go to the surface and redistribute so that the electric field in the conductor vanishes. One of

asked by Anonymous on March 21, 2013
49. ## Physics

A thin metallic spherical shell of radius .5m has a total charge of 8 μC uniformly distributed on it. At the center of the shell is placed a point charge of 4 μC. What is the electric field at a distance of .15 m from the center of the spherical shell? I

asked by Joe on January 27, 2016
50. ## Physics

About 5.12 x 104 m above Earth's surface, the atmosphere is sufficiently ionized that it behaves as a conductor. The Earth and the ionosphere form a giant spherical capacitor, with the lower atmosphere acting as a leaky dielectric. Find the capacitance C

asked by jason on February 16, 2012
51. ## Physics

A hollow spherical shell with mass 2.45kg rolls without slipping down a slope that makes an angle of 30.0∘ with the horizontal. a.) find the magnitude of the acceleration of the center of mass of the spherical shell. b.) find the magnitude of the

asked by Rosae on March 13, 2015
52. ## Physics

A hollow spherical shell with mass 2.45kg rolls without slipping down a slope that makes an angle of 30.0∘ with the horizontal. a.) find the magnitude of the acceleration of the center of mass of the spherical shell. b.) find the magnitude of the

asked by Rosae on March 12, 2015
53. ## Physics

A hollow spherical shell with mass 2.45kg rolls without slipping down a slope that makes an angle of 30.0∘ with the horizontal. a.) find the magnitude of the acceleration of the center of mass of the spherical shell. b.) find the magnitude of the

asked by Rosae on March 12, 2015
54. ## Physics

A solid sphere and a thin walled spherical she'll, both with a radius R, are set up to roll down a ramp and through a vertical loop of radius r. From what minimum height, h, does each sphere need to be released in order to make it around the loop? If the

asked by Kassy on November 8, 2016
55. ## Geometry

a. If a spherical Triangle on Earth has an excess of 30 degrees, find the area of this spherical triangle measured in square miles. b. If a spherical triangle on the moon has an excess of 30 degrees, find the area of this spherical triangle in sqare miles.

56. ## Math-geometry

. If a spherical Triangle on Earth has an excess of 30 degrees, find the area of this spherical triangle measured in square miles. b. If a spherical triangle on the moon has an excess of 30 degrees, find the area of this spherical triangle in sqare miles.

57. ## Physics

The electric potential inside a charged spherical conductor of radius R is given by V = kQ/R, and the potential outside is given by V = kQ/r. Using Er = -dV/dr, derive the electric field inside and outside this charge distribution.

asked by Christian on February 15, 2013
58. ## Maths

A spherical bath oil capsule dissolves in the bath so that its decrease in volume is proportional to its surface area. If its shape remains spherical as it dissolves, show that the radius of the capsule will decrease at a constant rate. Thanks to anyone

asked by Harry on May 13, 2019
59. ## physics

The electric field everywhere on the surface of a thin, spherical shell of radius 0.710 m is measured to be 860 N/C and points radially toward the center of the sphere. (a) What is the net charge within the sphere's surface? nC (b) What can you conclude

asked by priya on September 13, 2013
60. ## physics

A capacitor is formed of two identical coaxial disks of diameter 28cm. The distance d between the disks is adjustable . Calculate the capacitance of this capacitor at d=5mm. What becomes the value of this capacitance if a glass sheet 5mm thick is inserted

asked by sandra on April 13, 2016
61. ## physics

a simple pendulum of length 0.2m has bob of mass 5gm, it is pulled aside through an angle 60 degrees from the vertical. a spherical body of mass 2.5gm is placed at the lowest position of the bob. when the bob is released it strikes the spherical body and

asked by srikala on April 11, 2012
62. ## Physics

A 190 g basketball has a 37.3 cm diameter and may be approximated as a thin spherical shell. Starting from rest, how long will it take a basketball to roll without slipping 2.48 m down an incline that makes an angle of 46◦ with the horizontal? The moment

asked by Caryn on March 26, 2010
63. ## physics

Each of the following objects has a radius of 0.180 m and a mass of 2.65 kg, and each rotates about an axis through its center (as in the table below) with an angular speed of 41.4 rad/s. Find the magnitude of the angular momentum of each object. a) a hoop

asked by anonymous on December 15, 2012
64. ## physics

Each of the following objects has a radius of 0.180 m and a mass of 2.65 kg, and each rotates about an axis through its center (as in the table below) with an angular speed of 41.4 rad/s. Find the magnitude of the angular momentum of each object. a) a hoop

asked by anonymous on December 15, 2012
65. ## Physics ( Thickness of a Spherical Shell)

Aluminum floater: A spherical shell with an outer radius R=2 cm is made of aluminum (mass density of Al is 2.7 g/cm3). How thick is the shell if the average density of the spherical object is exactly 0.5 g/cm3 ? Assume there is a vacuum in the hollow

asked by JC on September 9, 2015
66. ## Math

A spherical balloon is to be deflated so that its radius decreases at a constant rate of 12 cm/min. At what rate must air be removed when the radius is 5 cm? Must be accurate to the 5th decimal place. It seems like an easy question but no matter how many

asked by Leah on October 5, 2014
67. ## physics

A 450 kg spherical mass is placed 4.40 meters away from a 550 kg spherical mass. What is the magnitude of the gravitational field midway between the two? ...... Im not quite sure how to do this any help would be appreciated.

asked by Chris on November 20, 2011
68. ## Physics :(( help please TT

Small raindrops are actually perfectly spherical. The pressure difference between the inside and outside of a spherical raindrop of volume 4.2×10^−9 m^3 is 280 Pa. What is the surface tension in N/m of the water on the outside of the raindrop?

asked by EPS on May 2, 2013
69. ## physics

Suppose a spherical planet P has a uniform density of 4.96*10^3 kg/m^3 and a radius R=1904 km. For a parcel that weighs 73 N on the surface of the (spherical) earth, what is A) gp/ge and B) its weight on the surface of P? Using the "tunnel mail" system

asked by Mudoh on April 11, 2011
70. ## Physics

Two circular metal disc each of 3.00 cm diamter are 1.5 mm apart make a capacitor. A)What is the capacitance of this capacitor if it is in series to a 25 V battery? B)What is the magnitude charge developing on each plate? C)While the batter remains

asked by Tim Cooper on March 28, 2012
71. ## Physics

A simplified model for an erythrocyte is a spherical capacitor with a positive inner surface of area A and a membrane of thickness b. Use potential difference of 86 mV across the membrane and a dielectric constant K = 5.0. If the capacitance of the

asked by Susie on March 6, 2010
72. ## Physics

A simplified model for an erythrocyte is a spherical capacitor with a positive inner surface of area A and a membrane of thickness b. Use potential difference of 98 mV across the membrane and a dielectric constant K = 5.0. If the capacitance of the

asked by Nelly on April 23, 2010
73. ## calculus

is my answer to this question correct A spherical balloon is losing air at the rate of 2 cubic inches per minute. How fast is the radius of the ballon shrinking when the radius is 8 inches. Answer= .0024

asked by Josh on January 8, 2017
74. ## Physical Sci

The Dyson sphere is an hypothetical spherical structure centered around a star. Inspired by a science fiction story, physicist Freeman Dyson described such a structure for the first time in a scientific paper in 1959. His basic idea consisted of an

asked by Rocket90 on October 2, 2009
75. ## Physics

M1 = 45.0 kg is a spherical mass at the origin. M2 = 16.6 kg is also a spherical mass, and is located on the x-axis at x = 78.0 m. At what value of x would a third mass M3 = 15.5 kg experience no net gravitational force due to M1 and M2?

asked by Natalie on July 11, 2015
76. ## Physics!! Help!!!!!

. A neutral conducting sphere contains a spherical cavity. A point charge +q is located at the |center of the cavity. A. What is the total surface charge on the interior surface of the conductor? B. What is the total charge on the exterior surface of the

asked by Melissa on February 3, 2012
77. ## Calculus Based Physics II

An air-ﬁlled spherical capacitor is constructed with inner and outer shell radii of 6.4 cm and 16.1 cm, respectively. Calculate the capacitance of the device. The value of the Coulomb constant is 8.98755 × 10 9 N·m^2/C^2 Answer in units of pF

asked by Jennifer on September 15, 2012
78. ## Physics help

If a spherical glass marble has a radius of 0.00665 m at 1.02×105 Pa, at what pressure will it have a radius of 0.00650 m? Thanks

asked by Alex on June 9, 2012
79. ## physics

If a spherical glass marble has a radius of 0.00661 m at 1.02×105 Pa, at what pressure will it have a radius of 0.00650 m?

asked by kylie on November 15, 2017
80. ## Math

Find the volume of a spherical cone in a sphere of radius 17 cm. if the radius of its zone is 8 cm.

asked by Anne on May 22, 2018
81. ## Geometry

Find the volume of a spherical cone in a sphere of radius 17 cm. if the radius of its zone is 8 cm.

asked by Marky on May 14, 2017
82. ## Math

The radius, r cm , of a spherical balloon at a time t seconds is given by r = 3 + 2 / (1+t) What is the initial radius? Find the rate of change of r (w.r.t.t) when t=3

asked by Aaqib zaman on January 28, 2015
83. ## Calculus I

A spherical balloon is inflated at a rate of 10 cm^3/min. How fast does the radius change when the radius is 20 cm? Need help with set up and work through of problem.

asked by Mike on March 2, 2015
84. ## Math

A spherical balloon is being inflated. Estimate the rate at which its surface area is changing with respect to the radius when the radius measures 20 cm.

asked by Lala on September 22, 2013
85. ## PHYSICS! HELIUM BALLON

Under standard conditions, the density of air is 1.293 kg/m3 and that of helium is 0.178 kg/m3. A spherical helium balloon lifts a basket plus cargo of mass 277.0 kg. What must be the minimum diameter of the spherical balloon?

asked by Mark on April 25, 2016
86. ## Bio

You cross homozygous spherical, heterozygous yellow plant with a dented green plant. How many do you expect from an offspring of 100 should be spherical and yellow

asked by Anonymous on February 3, 2016
87. ## URGENT physics

M1 is a spherical mass (38.6 kg) at the origin. M2 is also a spherical mass (10.3 kg) and is located on the x-axis at x = 59.8 m. At what value of x would a third mass with a 20.0 kg mass experience no net gravitational force due to M1 and M2?

asked by Marie on March 11, 2014
88. ## physics

M1 is a spherical mass (38.6 kg) at the origin. M2 is also a spherical mass (10.3 kg) and is located on the x-axis at x = 59.8 m. At what value of x would a third mass with a 20.0 kg mass experience no net gravitational force due to M1 and M2?

asked by Marie on March 11, 2014
89. ## Physics

A simplified model for an erythrocyte is a spherical capacitor with a positive inner surface of area A and a membrane of thickness b. Use potential difference of 94 mV across the membrane and a dielectric constant K = 5.0. If the capacitance of the

asked by Sandra on March 4, 2010
90. ## physics

A point charge of 2.4 μC is located at the center of a spherical shell of radius 17 cm, which has a charge −2.4 μC uniformly distributed on its surface. Given: ke = 8.98755 × 109 Nm2/C2 . a)Find the electric field for all points outside the spherical

asked by alex on September 19, 2011
91. ## math

RATES OF CHANGE QUESTION A spherical balloon is being blown up so that its volume is increasing by 0.6 m^3 s^-1. Find the rate at which the radius is increasing when the radius is 0.1 m. So what I did was that I determined dV/dt =0.6 and dV/dr = 4/3 r^3

asked by tina on June 13, 2010
92. ## physics

If a spherical shell has a uniform volume density of 1.84nC/m^3, inner radius a=.1m, outer radius b=.2m, what is magnitude of electric field at radial distances r=a, r=b, r=3b

asked by amy on February 6, 2012
93. ## Calculus

A tumor is assumed to be roughly spherical. If the radius R is found to be increasing at the rate of 0.5 mm/day when the radius is R=2 mm, how fast is the volume changing at this time?

asked by L.S. on December 14, 2011
94. ## Math

A spherical balloon is inflated with helium at the rate of 100pi ft ^3/min. How fast is the ballon's radius increasing at the instant the radius is 5ft.?

asked by Peggy on November 30, 2012
95. ## Chemistry

Neutron stars are composed of solid nuclear matter, primarily neutrons. Assume the radius of a neutron is approx. 1.0 x 10^-13 cm. Calculate the density of a neutron. [Hint: For a sphere V=(4/3) pi r^3. Assuming that a neutron star has the same density as

asked by Anonymous on October 11, 2015
96. ## physics

Careful measurements of local variations in the acceleration due to gravity can reveal the locations of oil deposits. Assume that the Earth is a uniform sphere of radius 6370 km and density 5500 kg/m3, except that there is a spherical region of radius 1.7

97. ## Calculus

A spherical ball is being filled with air. When the radius r=9cm, the radius is increasing at a rate 4 cm/s. How fast is the volume changing at this time (leave your answer approximate)?

asked by Jax on November 12, 2012
98. ## Calculus

A spherical party balloon is being inflated with helium pumped in at a rate of 12 cubic feet per minute. How fast is the radius growing at the instant when the radius has reached 1 ft?

asked by Anonymous on December 17, 2012
99. ## math-calculus

A spherical party balloon is being inflated with helium pumped in at a rate of 12 cubic feet per minute. How fast is the radius growing at the instant when the radius has reached 1 ft?

asked by Mel on December 17, 2012
100. ## math

A spherical ball is being filled with air. When the radius r=7cm, the radius is increasing at a rate 2 cm/s. How fast is the volume changing at this time (leave your answer approximate)?

asked by Rav on November 12, 2012