Related Questions

which one of the following glasses is used in bullet proof screens?
A Soda glass
B Pyrex glass
C Jena glass
D Reinforced glass
Which of the following is a valid assumption made in the viven argument?Premise I: People who wear glasses are smart.Premise II: John wears glasses.Conclusion: John is smart.
A All people who wear glasses are smart.
B Only people who wear glasses are smart
C John is the only person who wears glasses
D None of the above.
In a certain class 40% of the students are girls, and 20% of the girls wear glasses. What percent of students in the class are girls who wear glasses.
A 6%
B 8%
C 20%
At a symposium , 20 % of the professors are psychologists , 60% are biologists , and the remaining 12 professors are economists . If 20 of the professors were glasses , what present of the professors do not wear glasses ?
A 20%
B 33.1/3%
C 50%
D 66.2/3%
At a symposium, 20% of the professors are psychologists , 60% are biologists and the remaining 12 professors are economist. If 20 of the professors wear glasses, what percent of the professors do not wear glasses?
A 20%
B 331/3%
C 50%
D 66.2/3%
At a symposium 20% of the professors are psychologist, 60% are biologist and the remaining 12 professors are economist. If 20 of the professors wear glasses, what percent of the professors do not glasses?
A 20%
B 331/3%
C 50%
D 66.2/3%
A bullet is fired from a rifle which recoils after firing. The ratio of kinetic energy of the rifle to that of the bullet is
A Zero
B One
C Less than one
D More than one
Bullet proof glass is made of thick glass sheet sandwiched by a layer of
A Steel
B Stainless steel
C High test plastic
D Chromium plate
Materials for rain proof coats and tents owe their water proof properties to
A Surface tension
B Viscosity
C Specific gravity
D Elasticity
Which one of the following is used for sun glasses ?
A Pyrex glass
B Flint glass
C Crooks glass
D Crystal glass

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