In the formula average velocity = (u + v)/2, u is the _________.
Initial velocity
For motion with uniform acceleration, the kinematic convention is:
\(u\) = initial velocity, \(v\) = final velocity, \(a\) = acceleration, \(s\) = displacement.
The formula \(\text{average velocity}=\dfrac{u+v}{2}\) is the arithmetic mean of the starting and ending velocities, so \(u\) denotes the initial velocity.
What is the colour of the light emitted by the Sun?
Who found an empirical relationship between the half-life of alpha decay and the energy of the emitted alpha particles in 1911?
Ozone at the higher level of the atmosphere is a product of ______ acting on oxygen molecules.
What is the name of the phenomena (driven by the scattering of light) in which mountain tops acquire a rosy or orange hue around sunrise and sunset ?
Which one of the following statements is INCORRECT?
1 horsepower = approximately _____ watts.
What is the name of the phenomena in physics and astronomy which involves the splitting of a spectral line into two or more components of slightly different frequencies when the light source is placed in a magnetic field?
The sliding friction is ________ than the static friction.
Which of the following device is used to measure humidity?
The first electron shell which is the nearest to the nucleus never holds more than 'n' electrons, where 'n' is equal to:
What is the colour of the light emitted by the Sun?
Lightning occur in the sky when two clouds:
With reference to street-lighting, how do sodium lamps differ from LED lamps?
1. Sodium lamps produce light in 360 degrees but it is not so in the case of LED lamps.
2. As street lights, sodium lamps have a longer life span than LED lamps.
3. The spectrum of visible light from sodium lamps is almost monochromatic while LED lamps offer significant colour advantages in street lighting.
Select the correct answer using the code given below.
Which one of the following is a reason why astronomical distances are measured in light-years?
In a pressure cooker, the temperature at which the food is cooked depends mainly upon which of the following?
1. Area of the hole in the lid
2. Temperature of the flame
3. Weight of the lid
Select the correct answer using the code given below.