Mindblown: a blog about philosophy.

Use the data from Luis’ bike ride in question 7 to answer the following questions: a. What was Luis’ speed (in meters per second) for the entire ride, from 0 to 150 seconds? b. What was Luis’ speed (in meters per second) between 60 and 90 seconds? c. During which 30 second interval did Luis…

What volumes of 0.50 M HNO2 and 0.50 M NaNO2 must be mixed to prepare 1.00 L of a solution buffered a pH =3.55?

Consider a solution of an unknown salt having the general formula BHCl, where B is one of the weak bases in Table 14.3. A 0.10 M solution of the unknown salt has a pH of 5.82. What is the actual formula of the salt?

Monochloroacetic acid, HC2H2ClO2, is a skin irritant that is used in “chemical peels” intended to remove the top layer of dead skin from the face and ultimately improve the complexion. The value of Ka for monochloroacetic acid is 1.35x 10^-3 . Calculate the pH of a 0.10 M solution of monochloroacetic acid.

A column of liquid is found to expand linearly on heating 5.25 cm for a 10.0F rise in temperature. If the initial temperature of the liquid is 98.6F, what will the final temperature be in C if the liquid has expanded by 18.5 cm?

Why does the passage of a ray of light through a parallel-sided transparent medium result in the lateral displacement of a ray?

Find the refractive index of a material where the angle of incidence is 56° and the angle of refraction is 34°.

a) Name the type of logic gate shown in a Figure 5.88a. Write down its truth table. b) Show that when its two inputs are joined together as in Figure 5.88b it will act as a NOT gate.

a)  What size current will be drawn from the battery in Figure 5.41? Give your reasoning. b) If the battery is turned round, what size current will it now supply? Explain. (Assume the diode is an ideal one, so it requires zero voltage in the forward direction and possesses infinite resistance in the reverse direction.)

1. Two holes 2. One electron 3. Two electrons 4. One hole Answer:- 2. One electron When Arsenic is doped to Silicon, this forms four covalent bonds with the four valence electrons of Silicon. This results in the electron that is the fifth valence electron of Arsenic. Consequently, for every atom of Arsenic added to Silicon,…