PHIL 1000 Lecture Notes - Hylas, Hypokeimenon, General Idea

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olivepig175

17 Nov 2011

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We haven"t had a problem with that since september. There must be a perceiver for a sound and taste. In order for them to be, they must be perceived. If you don"t perceive colour, there is no colour. There may be something causing us to see the colour, but it only exists in things as perceived by us. Hylas first suggests that there is this distinguish between the primary and secondary. Philinous takes him through those steps, he tried to show him that those qualities are also mind dependent. We saw philonous" mistakes and so did hylas. Extension, size and shape in general are mind dependent. Page 32 distinguish between absolute and sensible extension there is extension in general that is independent according to hylas the next suggestion that philonous makes or challenge that he gives to hylas. He challanges him to come up with an abstract general idea of a motion independent of an object moving.

Related Questions

A ball of mass m is attached to a string of length L. It is swungin a vertical circle with enough speed to keep the string tautthroughout the motion. Assume the ball travels freely in the circlewith negligible loss of mechanical energy. Determine if thefollowing six statements are true or false.

1. The acceleration of the ball at the top of the circle isdirected `up'.
2. The tension in the string at the top of the circle can begreater, equal, or less than the weight of the ball, depending onthe speed of the ball.
3. The magnitude of the difference between the kinetic energy ofthe ball at the top and the bottom of the circle is 2mgL.
4. mvb2/L = Tb+mg, where vb and Tb are the speed of the ball andthe tension of the string at the bottom of the circle.
5. The tension in the string is less at the top of the circle thanat the bottom of the circle.
6. The difference between the tensions at the top and at the bottomof the circle is independent of the speed of the ball.

Let us define:
FE = electric force on the pith ball
m = mass of the pith ball
T = tension in the string

Draw the free-body diagram and write Newtonâs second law for thepith ball. You should have two equations, one in the horizontaldirection and one in the vertical direction:
T sin? = FE and T cos? = mg

Using these equations, you can obtain an expression for theelectric force FE in terms of m and ?. Write the angle ? in termsof distances y and z.

On the other hand, according to Coulombâs law,

Then set this expression for the force equal to the one obtainedfrom part 2.

At the end, we can write the deflection y in terms of the distancebetween the rod and the pith ball, x. This dependence is of theform y = (constant) xa. What is the value of the exponent a?

The measure of oneâs ability to perceive spatial differencesbetween objects is termed visual acuity. For this problem, assumethe center-to-center cone spacing in the human fovea is 2.5 Âµm, andthat the focal length of the eye is 24.3 mm (the distance from thefront of the eye to the retina).

(a) If the criterion for the eye to distinguish between two pointobjects in space is that there must be one unstimulated cone lyingbetween the two cones stimulated by the light from the pointobjects, what is the acuity of the eye in arc-minutes?

(b) Measurements have shown that an emmetropic eye has about 1arc-min of visual
acuity. Does this agree with the result you computed in part (a)?If not, give some
reasons why this might be.

(c) Imagine that you are designing a freeway traffic sign. Theletters should be clearly
readable by a person with normal vision from a quarter-mile away.What is the
smallest linewidth that the letters can have?

(d) During a long drive to Las Vegas, Patrick is sitting in thefront passenger seat, trying to read the reversed numbers on thefront license plate of the car behind him by viewing them throughthe passenger-side rear-view mirror, which reads, âObjects in themirror are closer than they appear.â Patrick is famous for hisknowledge of trivial facts, so he happens to know that a commonfocal length for these mirrors is 1350 mm in magnitude and that thelinewidth of the numbers on a license plate is 9 mm. If the car isapproaching from behind and one lane to the right, at what distancecan he start to clearly read the numbers on the license plate?

PHIL 1000 Lecture Notes - Hylas, Hypokeimenon, General Idea

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