Warm Hands by Friction: Temperature Increase Calculation

Chemistry 11
The speed of sound in air at room temperature is about 343 m/s. Calculate this speed in miles per hour. (1 mi = 1609 m.)

Chemistry 11
The reaction between aluminum and iron(III) oxide can generate temperatures approaching \(3000^{\circ} \mathrm{C}\) and is used in welding metals: \(2 \mathrm{Al}+\mathrm{Fe}_{2} \mathrm{O}_{3} \longrightarrow \mathrm{Al}_{2} \mathrm{

Anatomy & Physiology 1
Humans have the most urgent need for a continuous supply of ________. a. food b. nitrogen c. oxygen d. water

Anatomy & Physiology 1
In which direction would an MRI scanner move to produce sequential images of the body in the frontal plane, and in which direction would an MRI scanner move to produce sequential images of the body in the sagittal plane?

Campbell Biology: Concepts & Connections 7
Prokaryotes reproduce by binary fission. Prokaryotic cells reproduce asexually by cell division. As the cell replicates its single chromosome, the copies move apart; the growing membrane then divides the cell.

Essentials of Human Anatomy & Physiology 11
Is a bald man really hairless? Explain.

Human Anatomy & Physiology 9
Lymphocytes that develop immunocompetence in the bone marrow are (a) T lymphocytes, (b) B lymphocytes, (c) NK cells, (d) B and T lymphocytes.

Biochemistry 9
Beriberi is a disease caused by a deficiency of vitamin \(\mathrm{B}_{1}\) (thiamine) in the diet. Thiamine is the precursor of thiamine pyrophosphate. In view of what you have learned in this chapter, why is it not surprising that alcoholics tend to develop this disease?