Q1. This chart is used in clinical trials. It has a stepped shape, with each step representing an event (such as a relapse or a side-effect), making it easier to identify at what intervals certain events occur. It allows researchers to compare how well different treatments work, through a visual inspection. What is this chart called?
Ans. The Kaplan-Meier plot.
Q2. What is the study of the interaction of sliding surfaces, known as?
Ans. Tribology
Q3. What is the SI unit of luminous intensity?
Ans. Candela.
Q4. What is the best way to represent a subset?
Ans. Venn Diagram.
Q5. What is a set of numbers that jointly represent a point on a line graph known as?
Ans. Co-ordinate.
Q6. What is the most frequent value in a set of values known as?
Ans. Mode.
Q7. What is the exact reflection of a form on opposite sides of a line known as?
Ans. Symmetry.
Q8. What law applies to the working of hydraulic brakes in automobiles?
Ans. Pascal’s principle, also known as Pascal’s law, states that: in a fluid at rest in a closed container, a pressure change in one part is transmitted without loss to every portion of the fluid and to the walls of the container. The effect is used in such applications as hydraulic brakes.
Q9. In Roman numerals, what is represented by the letter C?
Ans. C which stands for centum or 100 in Latin.
Q10. What is the flow of electric charge that periodically reverses direction called?
Ans. Alternating current.
Q11. What did physicist J.J. Thomson discover in the 1890s when he analyzed cathode rays and concluded that they were made up of charged “corpuscles”?
Ans. Electrons.
Q12. The movie Enemy of the State (1998) showcased a technology that was not available then but is now used for surveillance. What technology is that?
Ans. Facial recognition.
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