This is the 12 section from Everyday Science. These questions and answers will be from Frequency, Vitamin B, Heart Beat, Electricity, Airport and Chemical.
Ques No.1: Mirage is an example of __________
Ans: Reflection of Light
Ques No.2: Frequency of audible sound is ____________.
Ans: 20-20,000 Hz
Ques No.3: The age of a tree can be determined by counting ____________
Ans: Rings of stem
Ques No.4: Deficiency of vitamin B causes _________.
Ques No.5: In a normal resting man, the rate of heart beat is _____________
Ans: 72 per minute
Ques No.6: Cheapest source of producing electricity is ________.
Ques No.7: In Pakistan copper is found in_________
Ques No.8: The smallest unit of measurement of wave-length is _________.
Ques No.9: __________ is the first winged space ship to orbit and return to airport landing.
Ans: American space shuttle Mercury Atlas-6
Ques No.10: The chemical generally used in refrigerator is ________.