Related Questions

The change in length due to a tensile or compressive force acting on a body is given by (where P = Tensile or compressive force acting on the body, $$l$$ = Original length of the body, A = Cross-sectional area of the body and E = Young's modulus for the material of the body)
A $$\frac{{{\text{P}}l{\text{A}}}}{{\text{E}}}$$
B $$\frac{{{\text{P}}l}}{{{\text{AE}}}}$$
C $$\frac{{\text{E}}}{{{\text{P}}l{\text{A}}}}$$
D $$\frac{{{\text{AE}}}}{{{\text{P}}l}}$$
In a mercury arc rectifier positive ions are attracted towards
A anode
B cathode
C shell bottom
D mercury pool
The shear force at the center of a simply supported beam with a gradually varying load from zero at both ends to w per meter at the center, is
A Zero
B $$\frac{{{\text{w}}l}}{4}$$
C $$\frac{{{\text{w}}l}}{2}$$
D $$\frac{{{\text{w}}{l^2}}}{2}$$
The periodic time of a compound pendulum is __________ when the distance between the point of suspension and the center of gravity is equal to the radius of gyration of the body about its center of gravity.
A Zero
B Minimum
C Maximum
D None of these
পৃথিবী পৃষ্ঠে একটি ইটের ওজন 81 N. পৃথিবীর অর্ধেক বাসার্ধের সমান উচ্চতায় এবং অর্ধেক বাসার্ধের সমান গভীরতায় ইউটির উপরে পৃথিবীর অভিকর্ষ বলের মান কত হবে?(A brick weighs 81 N on the surface of the earth. What are the earth's gravitational forces act on it at a height of half of the radius of the earth and at a depth of half of the radius of earth, respectively?)
A 36 N and 81 N
B 36 N and 40.5 N
C 36 N and 20.25 N
D 98 and 40.5 N
E 81 N and 81 N
A body has a weight W on the surface of Earth. What is its weight on a planet whose mass is 15 times that of Earth and a radius that is 4 times that of the earth?
A 15\/4 W
B 16\/9 W
C 16\/7 W
D 16\/15 W
The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth's early life and solidified into hard rock's called
A granite
B basalt
C igneous rocks
D sedimentary rocks
A man travels 5 miles towards west, 2 miles towards south, then again 5 miles towards west. What is the direct distance of destination from the starting point?
A 8 miles
B 15 miles
C 12 miles
D 6 miles
Azman travels 20 kilometers towards north, then 30 kilometers towards east, and then 20 kilometers towards north. How many kilometers is he now from the starting point?
A 20.3
B 70
C 44.7
D 50
The center to center distance, between two consecutive rivets in a row, is called
A Margin
B Pitch
C Back pitch
D Diagonal pitch

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