A 129-kg horizontal platform is a uniform disk of radius 1.51 m and can rotate about the vertical axis through its center. A 67.5-kg person stands on the platform at a distance of 1.09 m from the center and a 25.3-kg dog sits on the platform near the person, 1.37 m from the center. Find the moment of inertia of this system, consisting of the platform and its population, with respect to the axis.

A microscope's objective lens produces an image of the target object that forms 165 mm from the eyepiece lens (on the near side of the lens). The eyepiece lens has a focal length of 210 mm. Where does the image appear, relative to the eyepiece lens, from the perspective of someone using the microscope?

In your work, don't just provide the numerical answer that Kudu wants. Interpret what this value actually means.

Which of the following statements is false concerning bonding?

(1) A H-Cl bond is an example of a polar covalent bond.

(2) The bond in HCl is formed by sharing electrons

(3) In general, chemical bonds form to minimize energy.

(4) In a N-O bond, electron density is greater near the N atom

(5) Elements with extremely different electronegativities tend to form ionic bonds with each other.

You digest a plasmid with a restriction enzyme that recognizes a single site on the plasmid. When you perform gel electrophoresis on the digestion product, you quickly realize that there are two bands; one at the expected size and one near the well. Which of the following best explains the outcome?

a.DNA was trapped in the agarose gel
b.Some plasmids were not digested
c.The presence of the chromosomal DNA
d.The some plasmids ligated together

Can you imagine living in the young America we are reading about? If you could visit the U.S. in this era (say, you would have to stay for one hundred days, but then you could come back to the present) would you do so? Why/why not? Time travel may not be possible, but "human wormholes" certainly are, and they can reveal just how near to us "history" remains.

A farsighted woman breaks her current eyeglasses and is using an old pair whose refractive power is 1.785 diopters. Since these eyeglasses do not completely correct her vision, she must hold a newspaper 42.00 cm from her eyes in order to read it. She wears the eyeglasses 2.00 cm from her eyes. How far is her near point from her eyes?

A chemist analyzes seawater samples for two heavy metals: lead and mercury. Past experience indicates that 38% of the samples taken from near the mouth of a river on which numerous industrial plants are located contain toxic levels of lead or mercury; 32% contain toxic levels of lead and 16% contain toxic levels of mercury

What is the probability that a randomly selected sample will not contain lead or will not contain mercury?