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September 25, 2016

Search: rotational energy solid sphere of uniform density

Number of results: 26,540

earth science
#16 the inner core of the earth is solid because of increased__________ a> density and composition b> density and temperature c> temperature and pressure d> pressure and density
January 13, 2013 by ?

physics
A uniform spherical shell of mass M = 8.00 kg and radius R = 0.550 m can rotate about a vertical axis on frictionless bearings. A massless cord passes around the equator of the shell, over a pulley of rotational inertia I = 0.130 kgm2 and radius r = 0.140 m, and is attached ...
February 24, 2011 by jr

Physics
A person of mass 55 kg stands at the center of a rotating merry-go-round platform of radius 3.4 m and moment of inertia 670 kgm2. The platform rotates without friction with angular velocity 1.0 rad/s. The person walks radially to the edge of the platform. (a) Calculate the ...
January 23, 2011 by Sierra

Physics-Gauss' Law
1. If a surface is a 10 meter by 10 meter plane lying in the y-z plane, what is the vector representing the area of the plane? 2. If a sphere of radius 2 meters is placed in a uniform electric field of 3 N/C, what is the net flux through the sphere? 3. Show how Gauss's Law can...
March 23, 2008 by Bobby

Physics 1
What is the rotational kinetic energy of the Earth in its orbit around the sun?
April 17, 2014 by Sally

Chemistry
Consider the densities of the liquid substances listed. a) How will substance X, a solid, with density of 0.87 g/cm^3, behave when placed in each of the other pure liquids? b) Sketch and label a test tube containing substances A,B,C, and X. Assume that the liquids do not mix ...
September 9, 2009 by Bobbie

physics
A solid uniform 45.0 kg ball of diameter 32.0 cm is supported against a vertical frictionless wall using a thin 30 cm wire of negligible mass. (a) make a free body diagram for the ball and use it to find the tension in the wire and (b) how hard does the ball push against the ...
June 11, 2010 by L

math
A solid sphere of radius Xcm is placed in a cylinder of radius 2Xcm and height 2Xcm. The cylinder is then filled with water to the brim and the solid gently withdrawn. Find d volume of d water in d cylinder in cm3
May 27, 2014 by benjieo

Physics, Please help today
0.0100kg particles have been glued to a rod of Length L=6.00cm and negligible mass and can rotate around a perpendicular axis through point O at one end. How much work is required to change the rotational rate (a) from 0-20.0 rad/s, (b) from 20.0 rad/s to 40.0 rad/s, and (c) ...
November 30, 2006 by Dawn

physics
A particular trophy has a solid 0.2m radius base with a mass of 1.2kg. Rising up from the center is a 0.01m radius solid rod with a mass of 0.4kg. Centered on top of this is a hollow sphere with a radius of 0.15m and a mass of 0.8kg. Calculate the total moment of inertia for ...
October 16, 2012 by taryn

physics
A bowling ball of mass 7.45 kg is rolling at 2.56 m/s along a level surface. (a) Calculate the ball's translational kinetic energy. J (b) Calculate the ball's rotational kinetic energy. J (c) Calculate the ball's total kinetic energy. J (d) How much work would have to be done ...
March 6, 2015 by alba

Physics
A bowling ball of mass 7.45 kg is rolling at 2.56 m/s along a level surface. (a) Calculate the ball's translational kinetic energy. J (b) Calculate the ball's rotational kinetic energy. J (c) Calculate the ball's total kinetic energy. J (d) How much work would have to be done ...
March 6, 2015 by Yesica

physics
A bowling ball of mass 7.45 kg is rolling at 2.56 m/s along a level surface. (a) Calculate the ball's translational kinetic energy. J (b) Calculate the ball's rotational kinetic energy. J (c) Calculate the ball's total kinetic energy. J (d) How much work would have to be done ...
March 19, 2015 by alba

math
Find the volume of the following solid figure. Use = 3.14. V = 4/3r3. A sphere has a radius of 4.5 inches.
May 2, 2014 by wilton

math
A solid with at most one base cannot be which of the following? A. cone B. cube C. pyramid D. sphere Is the answer B?
January 6, 2016 by Awesomness

earth
#16 the inner core of the earth is solid because of increased__________ a> density and composition b> density and temperature c> temperature and pressure d> pressure and density
January 13, 2013 by ?

Physics
What equation is the rotational equilvalent of newton's law ? give the meaning of each symbol and state which rotational quantites are analogous to which linear quantities.
October 13, 2011 by leslie

sci.
How do you rank water in terms of density (solid liquid and gas)? (from least to greatest). I think it would be gas, solid, and liquid, but I just wanted to confirm this thanks
March 13, 2009 by Thalia

Physics
The relative density of a solid is 6.5. Find (1)the mass of a solid substance cube of side 20cm. (2) the volume of the substance if the mass is 1.3kg
August 14, 2015 by Oluchi

Physics
A 21-kg child starts at the center of a playground merry-go-round that has a radius of 3.5 m and rotational inertia of 500 kg⋅m2 and walks out to the edge. The merry-go-round has a rotational speed of 0.20 s−1 when she is at the center. What is its rotational speed...
April 4, 2016 by Jordann

Chemistry
Lithium is a soft, gray; solid that has the lowest density of any metal. If a rectangular slab of lithium weighs 1.49x10^3 mg and has a volume of 2.76 cm^3, what is the density of lithium in g/cm^3? Please and thank you!
June 25, 2011 by Mary

physics
A grandfather clock uses a physical pendulum to keep time. The pendulum consists of a uniform thin rod of mass M = 7.01 kg and length L = 0.15 m that is pivoted freely about one end, with a solid sphere of the same mass, 7.01 kg, and a radius of L/2 centered about the free end...
February 19, 2012 by janny

physics
a solid X, insoluble in water, weighs 180g in air and 150g in water. what is the relative density of the solid X? it is the physics question.
February 16, 2015 by gunjan

chemistry
What is the density of a sphere with a radius of 12.7 meters and a mass of 285 kilograms?
September 8, 2012 by Kira

pandu
Calculate the density of sphere whose mass 20g and its diameter 14 cm
February 20, 2016 by Haji

physics
If a particle were to move from position A to position b in 0.5s, what would be its rotational (angular) velocity? If the motion is uniform (constant speed), what would be its magnitude of the acceleration?
February 12, 2012 by Anonymous

math
how do you find the volume of the solid that lies within the sphere x^2+y^2+z^2=9 above the xy plane, and outside the cone z=2*sqrt(x^2+y^2)??
April 9, 2009 by alana

Maths 132
Find the volume of the solid lying in side both the sphere bounded x^2+y^2+z^2=4a^2 and the cylinder x^2+y^2=2ay
June 25, 2011 by Bir

calculus
Use polar coordinates to find the volume of the given solid. Inside the sphere x^2+y^2+z^2=25 and outside the cylinder x^2+y^2=1
October 18, 2014 by siri

Physics
A tower clock has an hour hand 2.70 m long with a mass of 60.o kg, and a minute hand 4.50 m long with a mass of 100 kg. Calculate the total rotational kinetic energy of the two hands about the axis of rotation. Sol: I know that Kr = 1/2Iw^2 or moment of inertia * omega squared...
April 18, 2007 by Anderson

Physics
A rod made from insulating material carries a net charge, while a copper sphere is neutral. The rod and the sphere do not touch. (a) Is it possible for the rod and the sphere to attract one another? (b) Is it possible for the rod and the sphere to repel one another? Explain ...
September 21, 2007 by Mary

physics
A volume of gas v at temperature T1 and pressure P, is enclosed in a sphere. It is connected to another sphere of volume v/2 by tube and stopcock. This second sphere is initially evacuated and the stopcock is closed. If the stopcock is now opened and the temperature of the gas...
March 21, 2012 by Joanna

physics
A volume of gas v at temperature T1 and pressure P, is enclosed in a sphere. It is connected to another sphere of volume v/2 by tube and stopcock. This second sphere is initially evacuated and the stopcock is closed. If the stopcock is now opened and the temperature of the gas...
March 21, 2012 by Joanna

physics
A volume of gas v at temperature T1 and pressure P, is enclosed in a sphere. It is connected to another sphere of volume v/2 by tube and stopcock. This second sphere is initially evacuated and the stopcock is closed. If the stopcock is now opened and the temperature of the gas...
March 21, 2012 by Joanna

physics
A volume of gas v at temperature T1 and pressure P, is enclosed in a sphere. It is connected to another sphere of volume v/2 by tube and stopcock. This second sphere is initially evacuated and the stopcock is closed. If the stopcock is now opened and the temperature of the gas...
March 21, 2012 by Joanna

physics help please 1!!
A 1.27 kg hoop with a radius of 10.0 cm rolls without slipping and has a linear speed of 1.32 m/s. Find the rotational kinetic energy. Find the total kinetic energy of the hoop.
October 18, 2008 by kelsey

Geometry
What does the diameter of a sphere join? any two points on the sphere any two points on the sphere and contains the center <~my choice any two points on the sphere and does not contain the center the center and a point on the sphere
February 24, 2016 by Jessica

Geometry
What does the radius of a sphere join? any two points on the sphere and does not contain the center any two points on the sphere and contains the center <~my choice any two points on the sphere the center and a point on the sphere
February 25, 2016 by Jessica

physics 12
A hollow sphere us charged to 14uc .Find the potential(a) at its surface (b) inside the sphere (c) at a distance of 0.2m from the surface.The radius of sphere is 0.3 m
August 29, 2014 by anonymous

Math
A cross-section of a sphere, which is 6 units from the center of the sphere, has a circumference of 8π units. Find the surface area of the sphere.
May 26, 2016 by Michelle

Dimensionless parameters
The drag, D, on a sphere located in a pipe flow through which a fluid is flowing to be determined experimentally. Assume that drag is a function of the sphere diameter, d, the pipe dianeter, H, the fluid velocity, V, and the fluid density, p. a) What dimensionless parameters ...
March 27, 2014 by Charlie

physics
A light ray parallel to the optical axis of a glass sphere of radius R enters the sphere at height H above the axis (H<R). The ray is refracted from air with = 34 into the sphere of unknown refractive index. If the refracted ray emerges at the point P where the sphere ...
April 6, 2011 by crystal

Physics
Packing material made of pieces of foamed polystyrene can easily become charged and stick to each other. Given that the density of this material is about 35 kg/m^3, estimate how much charge might be on a 2.5 cm diameter foamed polystyrene sphere, assuming the electric force ...
September 7, 2015 by Ana

PHYSICS 2
A 2.0 kg cylinder (radius = 0.08 m, length = 0.50 m) is released from rest at the top of a ramp and allowed to roll without slipping. The ramp is 0.77 m high and 5.0 m long. (b) What is its rotational kinetic energy? ? J (c) What is its translational kinetic energy? ? J How do...
October 20, 2008 by kelsey

PHYSICS!?!@@!
A 2.00-kg sphere is rotating about an axis through its center at 40.0 rev/s with the angular velocity in the +z direction. A torque 10.0 Nm acts on the sphere about the center of the sphere in the +x direction. What is the rate of change of the angular momentum of the sphere? ...
November 13, 2012 by Elyse

physics
The potential V at a distance of 25.0 cm from a very small charged sphere is 48.0 V, with V taken to be zero at an infinite distance from the sphere. A) If the sphere is treated as a point charge, what is its charge? B) What is the potential at a distance of 75.0 cm from the ...
September 20, 2009 by jkiyuhglj

SCIENCE HELP
CAN SOMEONE CHECK THESE!! 1. Which of the following is a reason why a person might want to wear snowshoes if walking a distance in deep snow? (1 point) snowshoes spread the persons weight out snowshoes reduce the amount of pressure on a given spot snowshoes keep the person ...
May 28, 2016 by gabby

PHYSICS
A 20.0 kg solid cylinder, 0.25m in radius, and a 5.0 kg thin hollow sphere, 0.50 m in radius, are released from rest at the exact same time at the top of a 10m long ramp inclined at 30. a) What is the final velocity of the cylinder at the bottom of the ramp? b) What is the ...
December 11, 2006 by danny

physics
A hole is drilled with smooth sides straight through the center of the earth to the other side of the earth. The air is removed from this tube (and the tube doesn't fill up with water, liquid rock or iron from the core). An object is dropped into one end of the tube and just ...
October 18, 2013 by Anonymous

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 the total volume, ...
September 2, 2014 by chris

Physics
Calculate the rotational inertia of a wheel that has a kinetic energy of 41.6 kJ when rotating at 264 rev/min.
November 9, 2011 by Emily

physics
Two spheres A and B, where A has twice the mas of B, are projected at the same horizontal velocity off the edge of two different height shelves. Sphere A leaves from a height of 2.0 m. Sphere B leaves a shelf 1.0 m off the floor. If both spheres leave the edge if the table at ...
November 28, 2010 by Katie

earth
The radius of the Earth is approximately 6370 km. If one could dig down straight towards the center of the Earth, one would find that the outermost 2890 km (the crust and the mantle) has an average density of about 4.5 g/cm3. Farther down is the core. If the average density of...
August 26, 2012 by Liz

Pre ALGEBRA
A solid with at most one base cannot be which of the following? A) cone B) cube C) pyramid D) sphere Is it A or D? MS SUE PLEASE HELP ME
February 21, 2015 by Oscar

Math
What does a curved surface and a circle make? a. sphere b. cone *** c. cylinder d. The two shapes won't form a geometric solid.
April 16, 2016 by Blake

Maths
A metal sphere of diameter 12cm is metted to formed a sphere of diameter 6cm calculate the number of sphere formed from the metal sphere
January 14, 2013 by Dayo

Physics please help!!
A satellite is in a circular orbit very close to the surface of a spherical planet. The period of the orbit is 2.23 hours. What is density of the planet? Assume that the planet has a uniform density.
March 4, 2013 by Jose

Physics
Estimate the terminal speed of a wooden sphere (density 0.770 g/cm3) falling through air, if its radius is 9.00 cm and its drag coefficient is 0.500. (The density of air is 1.20 kg/m3.) (b) From what height would a freely falling object reach this speed in the absence of air ...
January 24, 2010 by ucieng

Physics
Estimate the terminal speed of a wooden sphere (density 0.770 g/cm3) falling through air, if its radius is 9.00 cm and its drag coefficient is 0.500. (The density of air is 1.20 kg/m3.) (b) From what height would a freely falling object reach this speed in the absence of air ...
January 24, 2010 by ucieng

physics
Spaceman Spiff sits just outside the Milky Way galaxy with a cup of liquid Helium which is at approximately 4K (-269 0C). He has with him a small sphere made entirely of copper which is at a temperature of 219K (-54 0C). After a certain amount of time his copper sphere comes ...
April 27, 2010 by gian

Geometry
I don't know how to draw or do this. A plane 5 cm from the center of a sphere intersects the sphere in a circle with diameter of 24 cm. Find the diameter of the sphere.
March 27, 2008 by Anna

physics
Two spools with equal radii and equal masses are wound onto opposite ends of a massless string, the center of which is then hung over a massless, frictionless pulley, as in the diagram to the right. The spool on the left is a solid cylinder, while the one on the right is ...
May 15, 2016 by ChrismB

physics force
A positively charged rod is held near, but not touching, a neutral metal sphere. does the sphere experience a net force? if so, what direction/ I think the sphere has a net force to the left because since the sphere is neutral, it will have same number of protons as electrons...
August 17, 2009 by Anonymous

Science
1) A block of mass 0.5 kg is placed at the highest point of a fixed smooth sphere of radius 0.5m. The block is gently pushed to one side. Calculate: 0 the 3 o (1) force exerted by the block on the sphere when it makes an angle with the vertical. (ii) At what angle does it ...
May 10, 2012 by Vikas

Physics
Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of -8q. Sphere B carries a charge of +7q. Sphere C carries no net charge. Spheres A and B are touched together and then separated. Sphere C is then touched to sphere A and separated from it. Lastly...
August 28, 2007 by Mary

physics
a string supports a solid iron object of mass 180g totally immersed in liquid of density 800kg/m3. calculate the tension in the string if the density of iron is 8000kg/m3.
June 15, 2014 by joelinho

PHYSICS
Two spheres are launched horizontally from a 1.1m -high table. Sphere A is launched with an initial speed of 5.0M/S . Sphere B is launched with an initial speed of 3.0M/S A. What is the time for the sphere A to hit the floor? and sphere B to hit the ground B. What is the ...
August 25, 2010 by NENE

Physics
Update: Planets are not uniform inside. Normally, they are densest at the center and have decreasing density outward toward the surface. Model a spherically symmetric planet, with the same radius as the earth, as having a density that decreases linearly with distance from the ...
April 30, 2015 by Katie

Physics
Using volume of a sphere, calculate the average density of Saturn (radius = 60,268 km).
March 9, 2012 by Lalane

Physics
A centrifuge has a rotational inertia of 6.0 10-3 kg m2. How much energy must be supplied to bring it from rest to 420 rad/s?
April 12, 2010 by Max

Physics
How much torque is required to accelerate a uniform sphere of mass 10,000.0 kg and radius 2.5 meters from rest to an angular velocity of 60 rpm in a time of 90 seconds?
October 25, 2015 by Dallas

Physics
A bowling ball rolls without slipping up a ramp that slopes upward at an angle (beta) to the horizontal. Treat the ball as a uniform, solid sphere, ignoring the finger holes. What is the acceleration of the center of mass of the ball? Express your answer in terms of the ...
April 3, 2012 by Joe

physic
hi,need help please.thank. A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 2.00 m and a mass of 525 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 4000 rev/min. (a...
November 23, 2009 by Chan

PHYSICS
Three small spheres are placed at fixed points along the x-axis, whose positive direction points towards the right. Sphere A is at x = 23.0 cm, with a charge of -10.00 C. Sphere B is at x = 55.0 cm, with a charge of 2.00 C. Sphere C is at x = 57.0 cm, with a charge of -9.00...
May 3, 2010 by Jay

physics
The center of a 4.0 kg sphere and a 7.5 kg sphere are seperated by a distance of 1.5 m where is the center of mass of the two sphere system
February 4, 2008 by melissa

calculus
3. The radius r of a sphere is increasing at a constant rate of 0.04 centimeters per second. (Note: The volume of a sphere with radius r is v=4/3pir^3 ). a. At the time when the radius of the sphere is 10 cm, what is the rate of increase of its volume? b. At the time when the ...
January 3, 2012 by Yoona

Chemistry
Classify each of the following by the type of solid if forms: a. LiCl b. BaCl2 c. BCl3 d. CCl4 e. NCl3 I have four different types of solids to guess from like Metallic solid, ionic solid, molecular solid, covalent network solid and i dont know which goes with what element
February 4, 2008 by Lauren

AP Physics
A uniform spherical shell of mass M and radius R rotates about a vertical axiss on frictionless bearings. A massless cord passes around the equator of the shell, over a pulley of rotational inertia I and radius r, and is attached to a small object mass m. There's not friction ...
January 27, 2008 by Kristen

AP physics
A uniform spherical shell of mass M and radius R rotates about a vertical axiss on frictionless bearings. A massless cord passes around the equator of the shell, over a pulley of rotational inertia I and radius r, and is attached to a small object mass m. There's not friction ...
January 27, 2008 by Kristen

Science
The galaxies in the universe are all flying away from each other. The speeds of nearby galaxies are proportional to the distance the galaxy is away from us. This relation, v=Hd is known as Hubble's law and the constant H is known as Hubble's constant. The evolution of our ...
May 20, 2013 by Abhishek Ranjan

physics
A large plane having uniform charge density has an electric field just outside the plane that points directly toward the plane with magnitude 1.25104N/C . What is the surface charge density? Express your answer with the appropriate units.
February 4, 2014 by jrfannin

gen chem
suppose a compound could point in any of the three directions in the solid and still have the same energy. how many molecules would there be if the total entropy of a solid sample of this compound was 3.48x10^-9 j/k
May 9, 2010 by chemistry

maths
three spheres of diameter 2,3 & 4cms formed into a single sphere.Find the diameter of the new sphere assuming that the volume of a sphere is proportional to the cube of diameter.
November 17, 2015 by parth

Physics
A laser that emits pulses of UV lasting 2.95 ns has a beam diameter of 4.05 mm. If each burst contains an energy of 4.60 J, what is the length in space of each pulse? What is the average energy per unit volume (the energy density) in one of these pulses?
October 16, 2014 by Ashton

physics
A laser that emits pulses of UV lasting 2.95 ns has a beam diameter of 4.05 mm. If each burst contains an energy of 4.60 J, what is the length in space of each pulse? What is the average energy per unit volume (the energy density) in one of these pulses?
October 17, 2014 by Ashton

electrc field inside charged solid
how can electric field exist inside a uniform charge solid... when by gauss law electric field is zero inside a conductor
September 5, 2007 by sumit

Physics
Suppose the density of the Earth was somehow reduced from its actual value to 1300 kg/m3. What would be the value of g, the acceleration due to gravity, on this new planet? Assume the radius does not change. I know that density = mass/volume & the volume of a sphere = 4/3pir^3...
September 20, 2011 by Anon14

Physics
Biomedical measurements show that the arms and hands together typically make up 13.0% of a person's mass, while the legs and feet together account for 37.0% . For a rough (but reasonable) calculation, we can model the arms and legs as thin uniform bars pivoting about the ...
February 23, 2012 by john

Physics
the dimensions of torque are the same as those of energy. Why it would nevertheless be inappropriate to measure torque in joules. Energy is force x distance, where distance is the distance in the direction of force. Torque is force x distance perpenduclar to force. Joules is a...
February 26, 2007 by Ishani

physics
The galaxies in the universe are all flying away from each other. The speeds of nearby galaxies are proportional to the distance the galaxy is away from us. This relation, v=Hd is known as Hubble's law and the constant H is known as Hubble's constant. The evolution of our ...
May 23, 2013 by hrdcvrdcv

Physics
A solid of mass 400g in air and when partly is immersed in a certain liquid it has a mass 320g. Given that the relative density is 0.8. Calculate the volume of the solid immersed in the liquid.
January 16, 2011 by Asamoah

Chemistry
Which method increases the surface of a solid, allowing it to dissolve faster? A)changing the state of the solid B)adding gas to the solid C)heating the solid D)reducing the size of the solid ****Please help!!!!******* I think the answer is C but i am not completely sure. If ...
January 11, 2011 by AHS

math
1. Sphere C(-2,1,-3), radius=7. T plane at (4,-2,-1)=? (a) 6x-3y+2z=0 (b) r.(6,3,2)=28 (c) 5x-3y-2z=28 (d) r.(6/7,-3/7,2/7) 2. Sphere (x-1)+(y-5)+(z-2)=49 and planr r.(-2,-6,-3)=0 form which circle?(a) (x-1)+(y-5)+(z-2)=19.53 (b) C(0,0,0), radius=4.42 (c) radius=4.42, C...
March 11, 2010 by Anonymous

maths
1. Sphere C(-2,1,-3), radius=7. T plane at (4,-2,-1)=? (a) 6x-3y+2z=0 (b) r.(6,3,2)=28 (c) 5x-3y-2z=28 (d) r.(6/7,-3/7,2/7) 2. Sphere (x-1)+(y-5)+(z-2)=49 and planr r.(-2,-6,-3)=0 form which circle?(a) (x-1)+(y-5)+(z-2)=19.53 (b) C(0,0,0), radius=4.42 (c) radius=4.42, C...
March 12, 2010 by Anonymous

Science
1) Instead of using the word "random",is it acceptable to say particles in a liquid move about in "different" directions? 2) Why does ice have a higher density than water vapour? Is it because ice has a greater mass in a fixed volume? 3) The statement "Particles in a gas are ...
January 26, 2009 by anne

Physics help please!!!
Biomedical measurements show that the arms and hands together typically make up 13.0% of a person's mass, while the legs and feet together account for 37.0% . For a rough (but reasonable) calculation, we can model the arms and legs as thin uniform bars pivoting about the ...
February 23, 2012 by john

thermodynamics
A volume of gas V at temperature T1 and pressure P is enclosed in a sphere. If is connected to another sphere of volume V/2 by a tube and stop cork. This second sphere was initially evacuated and the stop cork is closed. If the stop cork is now opened and the temperature of ...
March 31, 2012 by frank fred

physics
sphere A has a mass of 4.2*10^-2 kg and is tethered to a wall by a thin thread. Sphere a has an excess of 1.2 *10^12 electrons. Sphere B has a deficit of 3.5*10^12 electrons and is o.23 m from sphere A a) determine the angle between the thread and the wall b) determine the ...
January 12, 2013 by ali

physics
sphere A has a mass of 4.2*10^-2 kg and is tethered to a wall by a thin thread. Sphere a has an excess of 1.2 *10^12 electrons. Sphere B has a deficit of 3.5*10^12 electrons and is o.23 m from sphere A a) determine the angle between the thread and the wall b) determine the ...
January 13, 2013 by josh

Physics
A merry-go-round in the park has a radius of 1.8 m and a rotational inertia of 900 kgm^2. A child pushes the merry-go-round with a constant force of 80 N applied at the edge and parallel to the edge. A frictional torque of 12 Nm acts at the axle of the merry-go-round. a. What ...
January 20, 2010 by Bell

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