Thursday
April 24, 2014

Posts by Laticia


Total # Posts: 8

Conceptual Physical Science
When we breathe we inhale oxygen, O2, plus water vapor, O2, and exhale carbon dioxide, CO2, plus water vapor, H2O. Which likely has more mass, the air that we inhale or the same volume of air we exhale? Does breathing cause you to lose or gain weight?

Conceptual Physical Science
What is the approximate mass of an oxygen atom in atomic mass units? What is the approximate mass of two oxygen atoms? How about an oxygen molecule?

Conceptual Physical Science
On a keyboard, you strike a note having a frequency of 256 Hz. (a) Show that the period of one vibration of this tone is 0.00391s. (b) As the sound leaves the instrument at a speed of 340 m/s, show that its wavelength in air is 1.33m.

Conceptual Physical Science
A bat flying in a cave emits a sound and receives its echo 0.1s later. Show that the distance to the wall of the cave is 17m. Thanks!

Conceptual Physical Science
A nurse counts 72 heartbeats in 1 min. Show that the period and frequency of the heartbeats are 0.83 and 1.2 Hz, respectively.

Ethics
Should we use genetic information to help produce more healthy humans?... to produce more intelligent humans? Should insurance companies use genetic information in their determination of whose insurable and at what cost? Explain. Thanks!

Ethics
How sound are Pojman's responses to the objections to capital punishment? (pp.144-149) This is a discussion for my Life and Death Ethics class

Conceptual Physical Science
At the stands of a racetrack, you notice smoke from the starter’s gun before you hear it fire. Explain.

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