In a passive transport across a membrane, when two protein molecules move in opposite direction arid independent of each other,it is called as__________

Fraction between two bodies in contact when one body just moves or tends to move over the other is called as

Why two boats moving in parallel directions close to each other get attracted?

If two streams of proton move parallel to each other in the same direction, then they

How do neutral solutes move across the plasma membrane? Can the polar molecules also move across it in the same way? If not, then how are these transported across the membrane?

Explain superposition of two pulses of equal amplitude and opposite phase moving towards each other.

Two particles are simultaneously projected in the horizontal direction from a point P at a certain height. The initial velocities of the particles are oppositely directed to each other and have magnitude v each. The separation between the particles at a time when their position vectors (drawn from the point P are mutually perpendicular, is

The frequency of a whistle of the engine of an express train moving with 20 m/s appears as 500 Hz to a car driver moving with the velocity 15 m/s. The velocity of the sound in air is 335 m/s. If the train and car are moving in opposite directions towards each other, then the frequency of the whistle is

Choose the correct options Consider following pair of forces of equal magnitude and opposite directions: (p) Gravitational forces exerted on each other by two point masses separted by a distance. (Q) Couple of forces used to rotate a water tap. ( R ) Gravitional force and normal force experienced by an object kept on a table. For which of these pair//pairs the two forces do NOT cancel each others's translational effect?

Two particles are oscillating along the same line with the same frequency and same amplitude. They meet each other at a point mid-way between the mean position and extreme position while going in opposite direction. The phase difference between their motions of

Two identical discs of same radius R are rotating about their axes in opposite directions with the same constant angular speed omega . The discs are in the same horizontal plane. At time t-0, the points P and Q are facing each other as shown in the figure. The relative speed between the two points P and Q is v_r , As a function of time, it is best represented by