Momentum is given by the product of mass and velocity. Mass is a scalar and velocity is a vector. Vector times scalar is always a vector.... View Article
The momentum of the object is given by the product of mass and velocity while the impulse is the change of momentum when a large force is applied... View Article
The magnetic field is produced by the moving electric charges and when a large number of unpaired electrons are aligned with their spins in the... View Article
The concave lens will not produce real images. Real images are not formed by a concave lens since the rays passing through the concave lens... View Article
Speed is the measure of how fast or how slow an object is moving. If the distance travelled by the object and the time taken for travel is known,... View Article
We are familiar with the apparent change in the pitch of the whistle of a fast-moving train as it passes the station. The pitch of the whistle... View Article
The harmful effects of friction are listed below Friction reduces the speed of the moving objects and it even stops the motion of the object.... View Article
Semiconductors like silicon, cadmium telluride, gallium arsenide and copper indium diselenide are the best material for photoelectric emission.... View Article
1) 6 2) 7 3) 8 4) 9 Answer: (2) 7 Solution: With three digits, 2,5,7, the digits for n can be taken in 3! ways Total number of n digits... View Article
1) 2500 2) 2499 3) 1729 4) 1440 Answer: (2) 2499 Solution: Suppose [x/99] = [x/101] = n Now, if n = 0, then x = 0,1,2,3,4,...,98 If n =... View Article
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 numbers are divisible by 3, then the... View Article
1) Less then 500 2) At least 750 but less than 1000 3) At least 500 but less then 750 4) At least 1000 Answer: (4) At least 1000 Solution:... View Article
