Related Questions

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
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 one of the following glasses is used in bullet proof screens?
A Soda glass
B Pyrex glass
C Jena glass
D Reinforced glass
Routers operate at layer _____. LAN switches operate at layer _____. Ethernet hubs operate at layer _____. Word processing operates at layer _____.
A 3, 3, 1, 7
B 3, 2, 1, none
C 3, 2, 1, 7
D 3, 3, 2, none
E All of the above
While investigating the site, a thick layer of fairly firm clay over a deep layer of soft clay is encountered. In such a situation, the following type of foundation is useful:
A Pile formation
B Raft foundation
C Grillage foundation
D None of these
Materials for rain proof coats and tents owe their water proof properties to
A Surface tension
B Viscosity
C Specific gravity
D Elasticity
কাগজের ভার হিসাবে ব্যবহৃত একটি পুরু কাচ (প্রতিসরাঙ্ক 1.5) খন্ডের উপর থেকে খাড়া নীচের দিকে তাকালে কাগজের উপর একটি দাগ কাচের উপর প্রান্ত থেকে 6 cm নীচে দেখা যায়। কাচ খন্ডতির পুরুত্ব কত? (When you look downward from the top of a thick glass (refractive index 1.5) slab used as a paper weight, a mark on the paper is seen 6 cm below from the top of the slab. What is the thickness of the glass slab?)
A 4 cm
B 6 cm
C 9 cm
D 12 cm
কাগজের ভার হিসাবে ব্যবহৃত একটি পুরু কাচ (প্রতিসরাঙ্ক 1.5) খণ্ডের উপর থেকে খাড়া নীচের দিকে তাকালে কাগজের উপর একটি দাগ কাচের উপর প্রান্ত থেকে 6 cm নীচে দেখা যায়। কাচ খন্ডটির পুরুত্ব কত? (When you look downward from the top of a thick glass (refractive index 1.5) slab used as a paper weight, a mark on the paper is seen 6 cm below from the top of the slab. What is the thickness of the glass slab?)
A 4 cm
B 6 cm
C 9 cm
D 12 cm
When hot liquid is poured into a thick glass tumbler, it cracks because glass :
A Is a bad conductor of heat so only inner surface expands
B Has high temperature coefficient of expansion
C Has a very low specific heat
D Has low temperature coefficient of expansion
The newest fiber-optic cables that carry telephone calls cross-country are made of glass so.......that a piece of 100 miles thick is clearer than a standard windowpane
A fragile
B immaculate
C tangible
D transparent

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