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The orbital angular momentum of a p-electron is given as:
A particle shows a distance-time curve as given in this figure. The maximum instantaneous velocity of the particle is around the point:
Which of the following options correctly represents the lung conditions in asthma and emphysema, respectively?
A car starts from rest and accelerates at $5 \text{ m/s}^2$. At $t=4 \text{ s}$, a ball is dropped out of a window by a person sitting in the car. What is the velocity and acceleration of the ball at $t=6 \text{ s}$? (Take $g=10 \text{ m/s}^2$)
A particle moving in a circle of radius $R$ with a uniform speed takes a time $T$ to complete one revolution. If this particle were projected with the same speed at an angle $\theta$ to the horizontal, the maximum height attained by it equals $4R$. The angle of projection, $\theta$ is then given by:
The graph that shows the correct variation of $\frac{1}{v}$ with $\frac{1}{u}$ for a concave mirror, where $u$ is the object distance and $v$ is the image distance, is:
A particle moves a distance x in time t according to equation x = (t + 5)⁻¹. The acceleration of the particle is proportional to:
The distance travelled by a particle starting from rest and moving with an acceleration 4/3 ms⁻², in the third second is
A particle covers half of its total distance with speed v₁ and the rest half distance with speed v₂. Its average speed during the complete journey is
A lift is going up. The total mass of the lift and the passenger is 1500 kg. The variation in the speed of the lift is as given in the graph. The height to which the lift takes the passenger is
A ball is dropped from a high rise platform at t = 0 starting from rest. After 6 s another ball is thrown downwards from the same platform with a speed v. The two balls meet at t = 18 s. What is the value of v? (take g = 10 ms⁻²)
Which of the following links amino acids together in a protein?
A bus is moving at a speed of 10 ms⁻¹ on a straight road. A scooterist wishes to overtake the bus in 100 s. If the bus is at a distance of 1 km from the scooterist, with what speed should the scooterist chase the bus?
A particle shows the distance-time curve as given in this figure. The maximum instantaneous velocity of the particle is around the point:
A person travelling in a straight line moves with a constant velocity v₁ for a certain distance x and with a constant velocity v₂ for the next equal distance. The average velocity v is given by the relation:
The x-t graph shown in figure represents
A ball is thrown vertically upwards. Which of the following graph/graphs represent velocity-time graph of the ball during its flight (air resistance is neglected)
The displacement-time graph of a moving particle is shown below. The instantaneous velocity of the particle is negative at the point
Velocity-time curve for a body projected vertically upwards is
The relation $3t = \sqrt{3x} + 6$ describes the displacement of a particle in one direction where $x$ is in metres and $t$ in seconds. The displacement, when velocity is zero, is: