A. also decrease
B. increase
C. remains constant
D. none of these
A. Rene Laennec
B. Steven Sasson
C. Martin Cooper
D. Dave Hyatt
The stethoscope was invented in France in 1816 by René Laennec at the Necker-Enfants Malades Hospital in Paris. It consisted of a wooden tube and was monaural. Laennec invented the stethoscope because he was not comfortable placing his ear directly onto a woman’s chest to listen to her heart.
A. 0°C
B. 4°C
C. 100°C
D. None of these
The vitamin Folate works together with __________ to produce new red blood cells?
A. Vitamin D
B. Vitamin A
C. Vitamin B-12
D. None of the above
A. Niels Bohr
B. Amedeo Avogadro
C. Joseph Black
D. None of Above
Joseph Black, a Scottish chemist and physician, first identified carbon dioxide in the 1750s. At room temperatures (20-25 oC), carbon dioxide is an odourless, colourless gas, which is faintly acidic and non-flammable. Carbon dioxide is a molecule with the molecular formula CO2.
A. In the Brain
B. In the Lung
C. In the Ear
D. In Stomach
Which from the following is true for “Sound”?