What is less dense water? The density of water is maximum at 3.98oC and has the least density at 0oC. When water freezes at 0oC, hydrogen-bonded... View Article
Why there is no backward wavefront? Energy flows from higher potential to lower potential. Similarly, the wave is a flow of energy through... View Article
What is a wave barrier? When the speed of the source is equal to the speed of the wave, a barrier wave is formed in front of the source as each... View Article
What is the significance of Fresnel Kirchhoff diffraction formula? It is used to calculate the pattern of diffraction when the waves pass through... View Article
Why is ionization dangerous? When the dose of the ionization is extremely high it can cause two types of harm to humans. It can cause tissue... View Article
What is reduced pressure in thermodynamics? The reduced pressure thermodynamics is defined as the ratio of the actual pressure of the system to... View Article
We are familiar with the term absolute zero. Absolute temperature is equal to -273.15 degrees and this is the lowest temperature that is achieved... View Article
What frequency is used to measure bridges? A metre bridge is used to measure a frequency range of 100 Hz to 100 kHz. The accuracy of a metre... View Article
Does any metal float? All metals can float in water if they are made into the right shape or size. For example, a boat. A boat or a metal floats... View Article
(cos p – 1) x2 + (cos p)x + sin p = 0 This is of the form ax2 + bx + c = 0, a = (cos p - 1), b = cos p, c = sin p The condition for real roots... View Article
Solution: (2) sin x – 3 sin 2x + sin 3x = cos x – 3 cos 2x + cos 3x (sin x + sin 3x) - 3 sin 2x = (cos x + cos 3x) - 3 cos 2x 2 sin 2x cos x... View Article
Solution: (3) Given, sin x + cos x = 1 Multiplying and dividing LHS by √2, √2[(sin x/√2) + (cos x/√2)] = 1 sin x sin π/4 + cos x cos π/4 =... View Article
Solution: (2) Given, tan θ = -4/3 We know that tan θ = Opposite/Adjacent and tan is negative in the second and fourth quadrants. sin is... View Article
Solution: (4) sin 36° sin 72° sin 108° sin 144° = sin 36° sin 72 sin (180° - 72°) sin (180° - 36°) = sin 36° sin 72° sin 72° sin 36° =... View Article
Edges are defined for three dimensional figures such as cube and cuboid. The volume of these shapes with the given fractional edges lengths is... View Article
