Physics, 23.07.2019 04:50, steven123pink

Three cubes, of side l0 , 2l0 , and 3l0 , are placed next to one another (in contact) with their centers along a straight line as shown in fig. 7–38. what is the position, along this line, of the cm of this system? assume the cubes are made of the same uniform material.

Answers: 1

Show answers

Answers

The CM is 61.66568509 units away from the center of the 310 cube in the direction of the center of the 210 cube. First, let's model each cube as a single point around it's center with all of the mass concentrated there. For convenience, I'll place each center on the x-axis with the center of the 310 cube at 0. So we have: For the 210 cube, it's center will be at the sum of half the length of the 310 cube's side plus half of the 210 cube's side. So x = 310/2 + 210/2 = 155+105 = 260. For the 10 cube. The location will be half of the 210 cube's side plus half of the 10 cube's side, plus the center of the 210 cube. So x = 260 + 210/2 + 10/2 = 260 + 105 + 5 = 370 x = 0 Mass 310*310*310 = 29791000 x = 260 Mass 210*210*210 = 9261000 x = 370 Mass 10*10*10 = 1000 Now the center of mass for a collection of objects is CM = sum(Mi*Ri)/M where CM = Location of center of mass Mi = Mass for object i Ri = Coordinates for object i M = Total mass of all objects So let's plug in the values and determine where the center of mass is: CM=(0*29791000 + 260*9261000 + 370*1000)/(29791000 + 9261000 + 1000) CM=(0 + 2407860000 + 370000)/39053000 CM=2408230000/39053000 CM=61.66568509 So the center of mass of the 3 cubes is 61.66568509 units from the center of the 310 cube towards the 210 cube. To demonstrate that the actual location doesn't matter for where the 310 cube is located, let's repeat using 155 as the cube's center location. So all three cubes get shifted over by 155 units, giving centers of 155, 415, and 525. So: CM=(155*29791000 + 415*9261000 + 525*1000)/(29791000 + 9261000 + 1000) CM=(4617605000 + 3843315000 + 525000)/39053000 CM=8461445000/39053000 CM=216.6656851 And if you subtract the location of the 310 cube, you get 216.6656851 - 155 = 61.66568509 which is in the same relative location from the center of the 310 cube.

answered: Guest

i think the answer is b

answered: Guest

relativism, roughly put, is the view that truth and falsity, right and wrong, standards of reasoning, and procedures of justification are products of differing conventions and frameworks of assessment and that their authority is confined to the context giving rise to them. more precisely, “relativism” covers views which maintain that—at a high level of abstraction—at least some class of things have the properties they have (e.g., beautiful, morally good, epistemically justified) not simpliciter, but only relative to a given framework of assessment (e.g., local cultural norms, individual standards), and correspondingly, that the truth of claims attributing these properties holds only once the relevant framework of assessment is specified or supplied. relativists characteristically insist, furthermore, that if something is only relatively so, then there can be no framework-independent vantage point from which the matter of whether the thing in question is so can be established.

relativism has been, in its various guises, both one of the most popular and most reviled philosophical doctrines of our time. defenders see it as a harbinger of tolerance and the only ethical and epistemic stance worthy of the open-minded and tolerant. detractors dismiss it for its alleged incoherence and uncritical intellectual permissiveness. debates about relativism permeate the whole spectrum of philosophical sub-disciplines. from ethics to epistemology, science to religion, political theory to ontology, theories of meaning and even logic, philosophy has felt the need to respond to this heady and seemingly subversive idea. discussions of relativism often also invoke considerations relevant to the very nature and methodology of philosophy and to the division between the so-called “analytic and continental” camps in philosophy. and yet, despite a long history of debate going back to plato and an increasingly large body of writing, it is still difficult to come to an agreed definition of what, at its core, relativism is, and what philosophical import it has. this entry attempts to provide a broad account of the many ways in which “relativism” has been defined, explained, defended and criticized.

explanation:

Other questions on the subject: Physics

Physics, 22.06.2019 19:30, CalCDanG

Assume that two of the electrons at the negative terminal have attached themselves to a nearby neutral atom. there is now a negative ion with a charge -2e at this terminal. what are the electric potential and electric potential energy of the negative ion relative to the electron? the electric potential and the electric potential energy are both twice as much. the electric potential is twice as much and the electric potential energy is the same. the electric potential is the same and the electric potential energy is twice as much. the electric potential and the electric potential energy are both the same. the electric potential is the same and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron. the electric potential is twice as much and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron.

Answers: 3

continue

Physics, 22.06.2019 19:50, naidaisha18

Ahuge (essentially infinite) horizontal nonconducting sheet 10.0 cm thick has charge uniformly spread over both faces. the upper face carries +95.0 nc/m2 while the lower face carries -25.0 nc/ m2. what is the magnitude of the electric field at a point within the sheet 2.00 cm below the upper face? (ε0 = 8.85 × 10-12 c2/n · m2)

Answers: 1

continue

Physics, 23.06.2019 08:30, keasiabrown25

Acertain half-reaction has a standard reduction potential e_red^0 = -0.94 v. an engineer proposes using this half-reaction at the cathode of a galvanic cell that e must provide at least 1.00 v of electrical power. the cell will operate under standard conditions. a. is there a minimum standard reduction potential that the half-reaction used at the anode of this cell can have? b. is there a maximum standard reduction potential that the half-reaction used at the anode of this cell can have?

Answers: 1

continue

Physics, 23.06.2019 08:40, arilions

Ascientist is working with a new kind of quantum dot to make a dye. he is applying newton’s laws to the particle, but it seems to be breaking these laws of physics. which action will most likely the scientist study the particle’s motion? a. he needs to remember that the particle is too large for quantum analysis. b. he must continue to use newtonian mechanics, but he needs to learn more about the particle. c. he needs to use quantum mechanics, not newtonian mechanics, because this is a nanotechnology product. d. he must determine new physical laws that only apply to quantum dots.

Answers: 1

continue

Do you know the correct answer?

Three cubes, of side l0 , 2l0 , and 3l0 , are placed next to one another (in contact) with their cen...