You have a grindstone with a mass of 90.0 kg, 0.340-m radius, and is turning at 90.0 rpm. You press a steel ax against it, bringing it to a stop in 36.0 s. (a) What is the change in kinetic

40,885 results

Physics

You have a grindstone with a mass of 90.0 kg, 0.340-m radius, and is turning at 90.0 rpm. You press a steel ax against it, bringing it to a stop in 36.0 s. (a) What is the change in kinetic energy of the grindstone? (b) If the tangential force due to the

asked by Anonymous on June 19, 2014

Physics

You have a grindstone (a disk) that is 92.0 kg, has a 0.490-m radius, and is turning at 83.0 rpm, and you press a steel axe against it with a radial force of 25.0 N. (a) Assuming the kinetic coefficient of friction between steel and stone is 0.50,

asked by Haya on April 15, 2017

physics

A grindstone in the shape of a solid disk with diameter 0.520 and a mass of = 50.0 is rotating at = 860 . You press an ax against the rim with a normal force of = 250 (Figure 1) , and the grindstone comes to rest in 7.40 . Find the coefficient of friction

asked by amy on May 3, 2013

physics

An electric motor exerts a constant torque of 10N⋅m to the shaft of a grindstone with mass 16kg and radius 0.5m. If the system starts from rest, find (a) the rotational kinetic energy of the grindstone after 8s, (b) the work done by the motor during this

asked by joy on April 22, 2018

Physics

A constant torque of 27.2 N · m is applied to a grindstone for which the moment of inertia is 0.158 kg · m2. Find the angular speed after the grindstone has made 18 rev. Assume the grindstone starts from rest. Answer in units of rad/s

asked by Leah on November 11, 2011

Physics

The grindstone weighs 80.0 kg, and has a radius of 0.320 m. The coefficient of friction between the axe and the stone is mk = 0.620 m. The radial component of the force of the axe against the grindstone is closest to…

asked by Kelsey on May 3, 2012

Physics

The grindstone, in the shape of a solid cylinder, weighs 80.0 kg, and has a radius of 0.320 m. The coefficient of friction between the axe and the stone is mk = 0.620 m. The radial component of the force of the axe against the grindstone is closest to…

asked by Kelsey on May 3, 2012

Physics

A grindstone of radius 4.0m is initially spinning with an angular speed of 8.0 rad/s. The angular speed is then increased to 12 rad/s over 4.0s. Assume that the angular acceleration is constant. What is the average angular speed of grindstone?

asked by Natasha on April 2, 2012

Physics

A constant torque of 22.9 N·m is applied to a grindstone whose moment of inertia is 0.168 kg·m2. Using energy principles, and neglecting friction, find the angular speed after the grindstone has made 17.1 rev, assuming it started from rest. Answer in

asked by dallas on April 2, 2013

physics

A playground merry-go-round has a disk-shaped platform that rotates with negligible friction about a vertical axis. The disk has a mass of 240 kg and a radius of 1.4 m. A 33- kg child rides at the center of the merry-go-round while a playmate sets it

asked by kate on November 18, 2009

Physics

A playground merry-go-round has a disk-shaped platform that rotates with negligible friction about a vertical axis. The disk has a mass of 240 kg and a radius of 1.4 m. A 33- kg child rides at the center of the merry-go-round while a playmate sets it

asked by Rachel on November 19, 2009

physics

A playground merry-go-round has a disk-shaped platform that rotates with negligible friction about a vertical axis. The disk has a mass of 210 kg and a radius of 1.8 m. A 35- kg child rides at the center of the merry-go-round while a playmate sets it

asked by john on November 23, 2009

Physics

A 0.25 mass is located on the outer edge of a wheel of radius 0.75 m that is turning at a rate of 2 revs/s. Determine the following: 1) The period of the mass 2) The angular speed of the mass in rad/s c) The tangential speed of the mass d) The centripetal

asked by Monika on December 13, 2009

momentum

A playground merry-go-round has a disk-shaped platform that rotates with negligible friction about a vertical axis. The disk has a mass of 230 kg and a radius of 1.6 m. A 38- kg child rides at the center of the merry-go-round while a playmate sets it

asked by Rachel on November 20, 2009

Physics please help

While visiting Planet Physics, you toss a rock straight up at 13.6 m/s and catch it 3.50 s later. While you visit the surface, your cruise ship orbits at an altitude equal to the planet’s radius every 340.0 minutes. What is the radius (in m) of the planet?

asked by Anonymous on November 27, 2011

Physics help please!

While visiting Planet Physics, you toss a rock straight up at 13.6 m/s and catch it 3.50 s later. While you visit the surface, your cruise ship orbits at an altitude equal to the planet’s radius every 340.0 minutes. What is the radius (in m) of the planet?

asked by … on November 29, 2011

physics

Two charges q 1 = −3.20 nC and q2 = +8.96 nC are at a distance of 1.94 µm from each other. q 1 is fixed at its location while q 2 is released from rest. (a) What is the kinetic energy of the charge q 2 when it is 0.340 µm from q 1? J (b) The charge q 2

asked by mathew on April 1, 2015

physics

The force exerted by the wind on the sails of a sailboat is 340 N north. The water exerts a force of 150 N east. If the boat (including its crew) has a mass of 340 kg, what are the magnitude and direction of its acceleration?

asked by bobby on September 16, 2010

physic

calculate the centripetal acceleration and the forcw acting on an aero plane of mass 1750Kg turning on a circle 430m radius at a velovity of 420m/s

asked by nashath on December 22, 2013

Algebra

Which solid has one base that is a rectangle and four lateral surfaces that are triangles? A. triangular pyramid *** B. cone C. rectangular prism D. rectangular pyramid A solid with two parallel and congruent bases cannot be which of the following? A. cone

asked by AJo on March 22, 2018

physics

A bug that has a mass mb = 1 g walks from the center to the edge of a disk that is freely turning at 38 rpm. The disk has a mass of md = 11 g. If the radius of the disk is R = 30 cm, what is the new rate of spinning in rpm?

asked by katie on March 25, 2012

Pysics

A wooden bucket ﬁlled with water has a mass of 59 kg and is attached to a rope that is wound around a cylinder with a radius of 0.071 m. A crank with a turning radius of 0.29 m is attached to the end of the cylinder. What minimum force directed

asked by joshua on December 7, 2012

Physics help please

While visiting Planet Physics, you toss a rock straight up at 13.6 m/s and catch it 3.50 s later. While you visit the surface, your cruise ship orbits at an altitude equal to the planet’s radius every 340.0 minutes. What is the mass (in kg) of the planet?

asked by Me on November 29, 2011

Physics help please!

While visiting Planet Physics, you toss a rock straight up at 13.6 m/s and catch it 3.50 s later. While you visit the surface, your cruise ship orbits at an altitude equal to the planet’s radius every 340.0 minutes. What is the mass (in kg) of the planet?

asked by …. on November 30, 2011

physics

A rock is dropped from a sea cliff, and the sound of it striking the ocean is heard 3.2 s later. If the speed of sound is 340 m/s, how high is the cliff? vo= 0; s=340 m/s; t= 3.2s h=? t1+t2= 3.2 s t2= 3.2-t1 I used Eq: h= vo*t^1+1/2at^2 rearranged eq. h=

asked by Lya on May 29, 2014

Physics

A bat flying in a cave emits a sound and receives its echo 1 s later. How far away is the cave wall? is it 340.29 m? the speed of sound is 340.29 m/s i believe v = d/t d = (t)(v) d = (340.29)(1) Nope but thanks for trying 🙂

asked by Courtney on March 1, 2007

Math for Ms. Sue please!

- Name the solid with the description as a figure that has one base that is a rectangle and four lateral surfaces that are triangles. (1 point) triangular pyramid cone rectangular prism rectangular pyramid 2. A solid with two parallel and congruent bases

asked by Delilah on March 7, 2013

Physics

Suppose you exert a force of 180 N tangential to a 0.280-m-radius 75.0-kg grindstone (a solid disk). (a)What torque is exerted? (b) What is the angular acceleration assuming negligible opposing friction? (c) What is the angular acceleration if there is an

asked by Justin on July 14, 2013

Physics

1)The annoying sound from a mosquito is produced when it beats its wings at the average rate of 600 wingbeats per seconds. What is the wavelength? The speed sound in the air is 340 m/s. I am not sure if I have to divide 600 by 340 to get 1.76 or do I

asked by Hannah on December 20, 2009

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.

asked by Kristen on January 27, 2008

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.

asked by Kristen on January 27, 2008

MAth

I am working a percent change word problem- 340 employees total and 56 laid off.? percent of decrease in employees. 340-56= 284 284 divided by 340 = 0.835 = 83% the book has an answer of 16% what am I missing or is the book incorrect?

asked by Caroline on May 12, 2011

Physics

If a cow’s mass is 391 kg and a car’s mass is 425 kg. what is the difference of their weight? A. 340 N B. 325 N C. 318 N D. 333 N

asked by Anonymous on October 4, 2018

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

asked by taryn on October 16, 2012

Algebra..please check my work!!

At 3 p.m., Brunhilde headed north at 30 kilometers per hour. Two hours later Ludwig headed south at 40 kilometers per hour. At what time will they be 340 kilometers apart? I know that the distance from Brunhilde(Db) plus the distance from Ludwig(Dl) is

asked by Tim on December 7, 2007

College Physics

A bowling ball (mass = 4.4 kg, radius = 0.11 m) and a billiard ball (mass = 0.35 kg, radius = 0.028 m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational force that each can exert on the other? What equation should I

asked by Anonymous on March 14, 2012

Physics

The circular blade on a radial arm saw is turning at 293 rad/s at the instant the motor is turned off. In 17.9 s, the speed of the blade is reduced to 60 rad/s. Assume the blade to be a uniform solid disk of radius 0.17 m and mass 0.400 kg. Find the

asked by James on November 28, 2015

astronomy

“super earths” are known to have similar densities and compositions to earth but they have a mass 2-10x greater than earth. If one of these super earth’s had a mass 5x the mass of earth what would be the super earth’s radius ? a) 1.7x earth’s radius b)

asked by sally on October 26, 2018

Physics

The speed of sound is about 340 m/s. Assume that when the motion detector emits an ultrasonic pulse, it must detect the reflected pulse before it can emit its next pulse. Assuming that the length of the air track is about 2 meters, what is the maximum

asked by Priscilla on February 26, 2012

space/astronomy

Rank the objects based on the strength of the gravitational force that would be felt by a spacecraft traveling at a distance of 10 AU from the center of each of the objects, from weakest to strongest. 1)red giant mass: 1Msun radius: 100Rsun 2)sun 3)white

asked by zack on November 30, 2009

Maths again

For the transformation w=z^2, show that as z moves once round the circle centre O and radius 2, w moves twice round centre O radius 4. I am okay finding the radius and centre of the locus but how do I show it moves twice roundfor w for z turning once. See

asked by Jake on February 24, 2007

Science

Physics A scientific instrument weighing 98 pounds on the Earth is transported to another planet whose mass is 1.7 Earth masses and whose radius is 0.7 Earth radii. What does this instrument weigh on this planet? To be graded correctly, enter the new

asked by Erika on February 6, 2017

Physica

A 21.0-kg satellite has a circular orbit with a period of 2.37 h and a radius of 8.50×106 m around a planet of unknown mass. If the magnitude of the gravitational acceleration on the surface of the planet is 7.10 m/s2, what is the radius of the planet? I

asked by winterWX on February 17, 2007

Physics

What are the three longest wavelengths for standing sound waves in a 124-cm-long tube that is (a) open at both ends and (b) open at one end, closed at the other? I did 340/(4*1.24)=68.54 3*340/(4*1.24)=205.64 but i am confused

asked by SB on November 9, 2009

math

what is the centripetal force acting on each kilogram of an airplane that is turning at 200 m/s in a horizontal circle of radius 10,000m?

asked by andrew gonzalez on February 24, 2010

Fluid Mechanics

A sluice gate consists of a quadrant of a circle of radius 1.5m pivoted at its centre O. Its centre of gravity is at G, as Shown in fig 1. When the water is level with the pivot O, calculate the magnitude and direction of the resultant force on the gate

asked by Mahmoud shamallah on November 10, 2013

calculus-can someone please help me with this ques

Given the following polynomial find, a. zeros and the multiplicity of each b. number of turning points c. end behavior f(x)=(x-1)(x-5) a. the multiplicity of (x-1)(x-5) x=1 and x=5—-is this correct b. number of turning points I had f(x)-0 at turning

asked by Jimmy-can someone please help on December 18, 2012

maths plz help me

TOP electronics is a small business with five employees. the mena (average) wekkly salary for the five employess is $360. if the weekly salaries of four of he employees are $340 $340 $345and $425, what is the slary of the fifth employee?

asked by Anonymous on November 9, 2008

Physics

- A certain playground merry-go-round is essentially an 90-kg iron disk 2.0 m in radius. Two children, each with a mass of 46 kg, are originally standing on opposite sides of the disk near its outer edge. The merry-go-round is turning essentially without

asked by Jordan on May 6, 2011

physics – I don’t know what’s wrong

A spring with a force constant of 111 Nm is attached to the ceiling. When an unknown mass is attached it pulls the spring down 0.340m to its equilibrium position. The mass is then pulled 9cm below its equilibrium position and oscillates back and forth.

asked by anonymous on January 9, 2018

Physics

A mass of 0.475 kg, on a frictionless table, is attached to a string which passes through a hole in the table. The hole is at the center of a horizontal circle in which the mass moves with constant speed. The radius of the circle is 0.510 m and the speed

asked by CPhy on April 18, 2013

Physics

A 13 kg bucket of water is attached toa rope that is wound around a cylinder whose radius is 10.3 cm. A crank with a turning radius of 44.6 cm is attached to the cylinder. If the bucket accelerates upwards at a rate of 1.21 m/s^2, then how much tension is

asked by courtney on January 17, 2008

Math

Determine the maximum and minimum number of turning points for the function h(x) = -2x^4 – 8x^3 + 5x -6. Maximum:3 Minimum:1 Is this a valid reason: A quartic polynomial function has a 3 Turning points. The turning point is always 1 less than the degree.

asked by Melinda on December 9, 2011

precalculus

Determine the maximum and minimum number of turning points for the function h(x) = -2x^4 – 8x^3 + 5x -6. Maximum:3 Minimum:1 Is this a valid reason: A quartic polynomial function has a 3 Turning points. The turning point is always 1 less than the degree.

asked by Melinda on December 9, 2011

newtanion mechanics

Find the center of mass of a uniform circular ring of mass M and radius R? (R is your radius in metre)

asked by sai on February 11, 2016

physics

A 15.5-m length of hose is wound around a reel, which is initially at rest. The moment of inertia of the reel is 0.42 kg · m2, and its radius is 0.170 m. When the reel is turning, friction at the axle exerts a torque of magnitude 3.63 N · m on the reel.

asked by valem on April 7, 2011

Physics

A 1.4-kg object moves along the x axis, subject to the potential energy shown in the figure. If the object’s speed at point B is 1.70 m/s, what are the approximate locations of its turning points? ___________m (left-hand turning point) ___________m

asked by Anonymous on May 2, 2015

more CHEM proofreading

for this question A sample of air has a volume of 140.0 mL at 67 degrees celcius. At what temperature would its volume 50.0 mL at constant pressure I did 140.0 ml… 67+273=340 T2… 50.0 140.0=50.0 340=T2 340*50.0/140.0=121.4 This question i don’t get

asked by jerson on April 27, 2008

college general chemistry

calculate the lowest whole number ratio of Moles of Mg/moles of O average of Moles of Mg/Moles of O Trial 1 mass of empty crucible and lid= 36.560 mass of Mg=0.348 mass of crucible, lid, and product=38.229 Trail 2 mass of empty crucible and lid=32.221 mass

asked by Amber on February 25, 2013

Physics

I’ve been stuck on this equation for a while and I don’t know if i’m missing a key part to the equation.. i just need help! If the gravitational field strength at the top of Mount Everest is 9.772 N/kg, approximately how tall (in feet) is the mountain? F=

asked by Larry on January 21, 2013

chem

hemoglobin, the oxygen-carrying protein in red blood cells, has four iron atoms per molecule and contains .340 percent iron by mass. calculate the molar mass of hemoglobin! thanks! 🙂

asked by skye on August 16, 2012

Physics

A 13.6-m length of hose is wound around a reel, which is initially at rest. The moment of inertia of the reel is 0.40 kg · m2, and its radius is 0.151 m. When the reel is turning, friction at the axle exerts a torque of magnitude 3.42 N · m on the reel.

asked by Elizabeth on November 15, 2012

Physics

A 13.6-m length of hose is wound around a reel, which is initially at rest. The moment of inertia of the reel is 0.40 kg · m2, and its radius is 0.151 m. When the reel is turning, friction at the axle exerts a torque of magnitude 3.42 N · m on the reel.

asked by Elizabeth on November 16, 2012

physics

A mass m is attached to a cord passing through a small hole in a frictionless, horizontal surface. The mass is initially orbiting with speed vi in a circle of radius ri. The cord is then slowly pulled from below, and the radius of the circle decreases to

asked by Jessi on April 6, 2009

Physics 1

A cart with mass 340 g moving on a frictionless linear air track at an initial speed of 1.5 m/s undergoes an elastic collision with an initially stationary cart of unknown mass. After the collision, the first cart continues in its original direction at

asked by Alex on April 22, 2014

Physics

The radius of the moon is approximately one quarter of the earth’s radius,and its mass is on eightieth of the earth’s mass.Calculate the weight of a man with a mass of 80KG on the surface of the moon

asked by Zanele on February 15, 2014

Physics

a siren on top of the police car emits sound at frequency of 820 Hz. The car passed a bystander on a sidewalk and is receding at speed 142 km/h/ what is the frequency the bystander hears. assume the speed of sound in air to be 340 m/s. 142 km/h x 1000 /

asked by Maria on May 1, 2018

Precalculus

Number of possible turning points in the following equation f(x)=x^2(x-3)(x+4) are there 2 turning points or three turning points on the graph

asked by Arielt on March 11, 2010

physics

A mass of 0.04 kg is attached to a cord passing through a small hole in a frictionless, horizontal surface. The mass is initially orbiting with speed 4.9 m/s in a circle of radius 0.4 m. The cord is then slowly pulled from below, decreasing the radius of

asked by will on October 19, 2011

Physics

An electric motor exert a constant torque of 10Nm on a grindstone about the shaft is 2.0kg/m². If the system starts from rest, find the work done by the motor in 8sec.

asked by Mjay on April 2, 2018

Physics

A uniform cylindrical spool of mass M and radius R unwinds an essentially massless rope under the weight of a mass m. If R = 12 cm, M = 400 gm and m = 50 gm, find the speed of m after it has descended 50 cm starting from rest. Solve the problem twice: once

asked by Nora on March 31, 2015

PHYSICS

A 15 M LENGTH OF HOSE IS WOUND AROUND A REEL WHICH IS INITIALLY AT REST. THE MOMENT OF INERTIA OF THE REEL OF 0.44KGM^2 AND ITS RADIUS IS 0.160M. WHEN THE REEL IS TURNING FRICTION AT THE AXLE EXERTS A TORQUE OF MAGNITUDE 3.40NM ON THE REEL. IF THE HOSE IS

asked by kassy on November 8, 2016

Physics

A 1.4-kg object moves along the x axis, subject to the potential energy shown in the figure. If the object’s speed at point B is 1.70 m/s, what are the approximate locations of its turning points? ___________m (left-hand turning point) ___________m

asked by Anonymous on May 2, 2015

science

The moon is the earth’s nearest neighbor in space the radius of the moon is approximately one quarter of the earth’s radius and it’s mass is one eightieth of the earth’s mass.(a)calculate the weight of an object with a mass of 50.0kg on the surface of the

asked by lebo on February 21, 2013

Science..physics

The moon is the Earth’s nearest neighbour in space. The radius of the moon is approximately one quarter of the Earth’s radius, and its mass is one eightieth of the Earth’s mass. a) Culculate the weight of a man with a mass of 80kg on the surface of the

asked by Melyn on April 24, 2013

Physics

Since moment of inertia is a scalar quantity, a compound object made up of several objects joined together has a moment of inertia which is the scalar sum of the individual moments of inertia. A) A wooden cylinder has mass m and radius R. To be used as a

asked by Anonymous on October 26, 2016

physics

A 0.5 kg mass is moving in a circle of radius 1.8 m on a flat frictionless table at the end of a string. The speed of the mass is 2.6 m/s. The string routes through a hole in the center of the table and is held by you underneath the table. What is the

asked by Anonymous on June 7, 2013

Physics

A 0.5 kg mass is moving in a circle of radius 1.8 m on a flat frictionless table at the end of a string. The speed of the mass is 2.6 m/s. The string routes through a hole in the center of the table and is held by you underneath the table. A.) What is the

asked by Dusty on June 7, 2013

physic

Neutron stars are extremely dense objects with a mass comparable to the mass of the sun but a radius of only several thousand meters. Consider a neutron star of mass M = 1.99e+030 kg and a radius of R = 10 km. g = 1.3279e12 m/s Assuming uniform density,

asked by x on May 23, 2007

Physics

I am having trouble with the last portion of this question. If someone can help me, I would sincerely appreciate it. A bicycle wheel has a radius R = 32.0 cm and a mass M = 1.82 kg which you may assume to be concentrated on the outside radius. A resistive

asked by Matt on July 7, 2011

Physics

A bowling ball (mass = 7.2 kg, radius = 0.14 m) and a billiard ball (mass = 0.40 kg, radius = 0.028 m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational force that each can exert on the other?

asked by Donald on October 3, 2012

physics

- A bowling ball (mass = 7.2 kg, radius = 0.13 m) and a billiard ball (mass = 0.45 kg, radius = 0.028 m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational force that each can exert on the other?

asked by sam on June 27, 2013

physics

A bowling ball (mass = 7.2 kg, radius = 0.12 m) and a billiard ball (mass = 0.31 kg, radius = 0.028 m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational force that each can exert on the other?

asked by cody on February 10, 2012

Math

Frank has $20 less than Tracy. John has twice as much as Frank. Patty has three times as much as John. Together they have $340. How much does each person have? I tried multiple different numbers but they were either more or less then $340

asked by Natasha on February 2, 2017

physics

A newly-discovered plant, “Cosmo”, has a mass that is 4 times the mass of the Earth. The radius of the Earth is Re. The gravitational field strength at the surface of Cosmo is equal to that at the surface of the Earth if the radius of Cosmo is equal to…

asked by Hannah on January 19, 2008

Mathematics

A right circular cone of base radius r cm and height h cm fits exactly into a sphere of internal radius 12cm. a)Express r in terms of h. b)If the volume of the cone is Vcm cube, show that V=8¶h^2 – 1/3¶h^3 c)Find the value of r for which V has a turning

asked by Riley on June 19, 2009

physics

First off, thanks a lot for your help. Secondly, will you do it again? A bicyclist traveling with speed v = 3.2m/s on a flat toad is making a turn with radius r = 2.8 m. The forces acting on the cyclist and cycle are the normal force (N) and friction force

asked by dear drwls on April 13, 2008

Algebra ii

The pulley attached to the turning knob of a radio has a radius of 35 mm. How far will the needle move if the knob is turned a quarter of a revolution?

asked by Arielle on November 3, 2011

physics

Two objects of equal mass are on a turning wheel. Mass 1 is located at the rim of the wheel while mass 2 is located halfway between the rim and the axis of rotation. The wheel is rotating with a non-zero angular acceleration. For each of the following

asked by Sue on September 22, 2013

Physics

1) Planet Zero has a mass of 5.0*10^23 kg and a radius of 2.0*10^6 meters. What is the acceleration of gravity on planet zero? 2)Phobos, a satellite of Mars, has a radius of 11km and a mass of 10^16 kg. Its a bit lumpy, but let’s assume its spherical to

asked by Charlie on December 6, 2014

math

One cubic meter (1.00 m3) of aluminum has a mass of 2.70E+3kg, and 1.00m3 of silver has a mass of 1.05E+4kg. Find the radius of an aluminum sphere whose mass is the same as that of an silver sphere of radius 1.07cm.

asked by andy on September 7, 2014

physics

a woman who weighs 150 lb. on earth would weigh 340 lb. on another planet, what is her mass on earth, what is her mass on the other planet, what is the magnitude of the gravitational field on the other planet

asked by Brad on August 11, 2016

physics

A cart of mass 340 g moving on a frictionless linear air track at an initial speed of 1.2 m/s undergoes an elastic collision with an initially stationary cart of unknown mass. After the collision the first cart continues in its original direction at

asked by Chris on March 3, 2007

Math – Simple rational functions (check)

Consider the function f(x) = x/(x-1) Are there any turning points? Explain how this could help you graph f(x) for large values of x? Ans: turning points is another word for checking the concavity, and therefore i find the second derivative and equate it to

asked by Anonymous on October 29, 2010

MATH!!!

(1)TOP Electronics is a small business with five employees.The mean(avergae) weekly salary for the five emplyees is $360. If the weekly salaries of four of the employees are $340,$340,$345, and $425, what is the salary if the fifth employee?

asked by megan on March 11, 2007

trig

A gear with a radius of 32 centimeters is turning at pi/9 radians/sec. What is the linear speed (velocity) at a point on the outer edge of the gear?

asked by Chris on March 15, 2015

Physics

What is the centripetal acceleration in meters per second squared of a point on the rim of a circle with a radius of 0.45 meters and turning at a rate of 1200 rpm?

asked by George on March 12, 2015

science

a mass being spun horizontally on a string of radius 1.2 m makes 100 revolutions is 45s. a) find the speed of the mass b) find the centripetal acceleration of the mass. a) to find velocity would i use v = (2 pi r)/ T but I am not sure what the (T) period

asked by randy on November 2, 2006

physics

An object rests on the surface of planet y. Its mass is unknown. Find the acceleration due to gravity near the surface of planet y. Answer in m/s/s. G=6.673×10^-23 radius of planet y=2439700m mass of planet y=3.302×10^23kg radius of planet x=71492000m mass

asked by camille on April 10, 2011

Physics

A 1500 kg car is turning around an arc of radius 20 m at a constant speed of 30 mph without slipping. What is the friction force the ground exerts on the car?

asked by James on March 21, 2011