What Is The Formula For Thermal Efficiency
The thermal efficiency of a heat engine is defined as the ratio of the amount of work done to the... View Article
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What Are The Principles Of Momentum
The law of conservation of momentum states that the total momentum of an isolated system of interacting particles is conserved.... View Article
Does Momentum Have A Direction
Momentum is given by the product of mass and velocity. Mass is a scalar and velocity is a vector. Vector... View Article
What Is The Difference Between Impulse And Momentum
The momentum of the object is given by the product of mass and velocity while the impulse is the change... View Article
What Produces A Magnetic Field
The magnetic field is produced by the moving electric charges and when a large number of unpaired electrons are aligned... View Article
Can A Concave Lens Produce A Real Image
The concave lens will not produce real images. Real images are not formed by a concave lens since the rays... View Article
How Do You Calculate Speed
Speed is the measure of how fast or how slow an object is moving. If the distance travelled by the... View Article
How Does The Doppler Effect Work
We are familiar with the apparent change in the pitch of the whistle of a fast-moving train as it passes... View Article
How Is Friction Harmful
The harmful effects of friction are listed below Friction reduces the speed of the moving objects and it even stops... View Article
Which Is The Best Material For Photoelectric Emission Why
Semiconductors like silicon, cadmium telluride, gallium arsenide and copper indium diselenide are the best material for photoelectric emission. Generally, for... View Article
Nine Hundred Distinct N Digit Numbers Are Formed Using Only 3 Digits 257 The Smallest Value Of N
1) 6 2) 7 3) 8 4) 9 Answer: (2) 7 Solution: With three digits, 2,5,7, the digits for n... View Article
If The Letters Of Word Sachin Are Arranged In All Possible Ways And These Words Are Written In Dictionary
1) 600 2) 601 3) 602 4) 603 Answer: (2) 601 Solution: Arranging the word SACHIN in alphabetical order: A,C,H,I,N,S... View Article
The Greatest Integer N Such That 42n Divides 2007 Is
1) 329 2) 330 3) 331 4) 332 Answer: (3) 331 Solution: 42 = 2 x 3 x 7 42n... View Article
The Number Of Positive Integral Solutions Of The Equation Is X99 X101 Is
1) 2500 2) 2499 3) 1729 4) 1440 Answer: (2) 2499 Solution: Suppose [x/99] = [x/101] = n Now, if... View Article
Five Digit Numbers Divisible By 3 Are Formed Using The Digits 01234567 Without Repetition
1) 936 2) 480 3) 600 4) 216 Answer: (3) 600 Solution: Given, 0,1,2,3,4,5,6, and 7 If the five digit... View Article
The Range Of Function Fx 7xpx3 Is
1) {1,2,3} 2) {1,2,3,4} 3) {1.2,3,4,5} 4) {1,2,3,4,5,6} Answer: (1) {1,2,3} Solution: Given, f(x) = 7-xPx-3 Then x-3≥0 x≥1 ……(i)... View Article
There Are 4 Balls Of Different Colours And 4 Boxes Of Colours Same As Those Of The Balls The No Of Ways
1) 5 2) 6 3) 9 4) 12 Answer: (3) 9 Solution: Given, there are 4 balls of different colours... View Article
A Round Table Conference Is To Be Held Among 20 Delegates Of 20 Countries The Number Of Ways Are
1) 17.18! 2) 18.19! 3) 20!/2 4) 19!.2 Answer: (1) 17.18! Solution:We have 20 delegates of 20 countries Number of... View Article
The Number Of Ways In Which Ten Candidates A1a2a10 Can Be Ranked If A1 Is Always Above A2 Is
1) 2.8! 2)9! 3) 10!/2 4) 10! Answer: (3) 10!/2 Solution: Total number of ways 10 candidates can be arranged... View Article
At An Election 3 Wards Of A Town Are Convassed By 45 And 8 Men Respectively If There Are 20 Volunteers
1) 20P4.20P5.20P8 2) 20C4.20C5.20C8 3) 20C4.16C5.11C8 4) 1/(3!).20C4.16C5.11C8 Answer: (3) 20C4.16C5.11C8 Solution: Let the three wards be A, B and... View Article
