A spring gun of spring constant 90 is compressed 12 cm by a ball of mass 16 g. If the trigger is pulled, the velocity of the ball is

The minimum velocity (in ) with which a car driver must traverse a flat curve of radius 150 m and coefficient of friction 0.6 to avoid skidding is

Read the two reaction A and B given below and select the correct option accordingly
A) ADP + Pi ATP
B) ATP ADP + Pi

Therefore the correct option is choice 1

A parallel plate capacitor of area A, plate separation d and capacitance is filled with three different dielectric materials having dielectric constants as shown. If a single dieletric material is to be used to have the same capacitance is this capacitors, then its dielectric constant is given by

A body weight 8 g when placed in one pan and 18 g when placed on the other pan of a false balance. If the beam is horizontal when both the pans are empty. The true weight of the body is

If a body of mass is carried by a lift moving with an upward acceleration , then the forces acting on the body are (i) the reaction on the floor of the lift upwards (ii) the weight of the body acting vertically downwards. The equation of motion will be given by

The equation of motion of a particle moving along a straight line is , where the units of s and t are cm and sec. The acceleration of the particle will be zero after

Assertion : First law of thermodynamics is not adequate in predicting the direction of a process
Reason : Total energy of universe is constant.

Which one of the following pairs is mismatched?

Statement 1: Libriformfibres are true fibres.
Statement 2: Libriformfibres develop from non-functional tracheids by reduction.

Statement 1: In collateral vascular bundles, the phloem is situated towards inner side.
Statement 2:In monocot stem, cambium is present.

Statement 1: Many organs of aquatic plants float in water.
Statement 2: Large air gaps are present in the collenchyma tissues of lotus leaf.

Statement 1: Apical and intercalary meristems contribute to the growth in length while the lateral meristems bring an increase in girth in maize.
Statement 2: Apical and intercalary meristems always increase the height of plants.

Statement 1: All the endodermal cells of the root do not contain Casparian thickenings on their radial and transverse walls.
Statement 2: Passage cells are found in the root endodermis.

Statement 1: The quiescent centre acts as a reservoir of relatively resistant cells, which constitute a permanent source of active initials.
Statement 2: The cells of the inactive region of the quiescent centre become active when the previous active initials get damaged.

Statement 1: In a vessel, septa among the adjoining cells get dissolved.
Statement 2: Companion cells are a component of phloem.