How many bones are in Human Skull?
A. 22
B. 25
C. 26
D. None of these
A. 22
B. 25
C. 26
D. None of these
A. Tooth enamel
B. Skull
C. Knee cap
D. Rib
Enamel is the hardest substance in the human body and contains the highest percentage of minerals, 96%, with water and organic material composing the rest. The primary mineral is hydroxyapatite, which is a crystalline calcium phosphate
A. A binocular
B. A camera
C. An epidiascope
D. A stereoscope
The average speed of a moving object during a given interval of time is always:
A. the magnitude of its average velocity over the interval
B. the distance covered during the time interval divided by the time interval
C. one-half its speed at the end of the interval
D. its acceleration multiplied by the time interval
E. one-half its acceleration multiplied by the time interval
At what angle above the horizon must the sun be to create a rainbow?
A. 90 degrees
B. 60 degrees
C. 40 degrees
D. 65 degrees
A. Copper
B. Tin
C. Iron
D. None
A. Reflection
B. Total internal reflection
C. Refraction
D. None of these