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The unit of rate of a first order reaction is

A first-order reaction can be defined as a chemical reaction in which the reaction rate is linearly dependent on the concentration of only one... View Article

The electric field at a distance 3R/2 the centre of a charged conducting spherical shell of radius R is E. The electric field at a distance R/2 from the centre of the sphere is (a) zero (b) E (c) E/2 (d) E/3

The correct answer is (a) zero Gauss law states that According to the Gauss law, the total flux linked with a closed surface is... View Article

A car accelerates on a horizontal road due to the force exerted by (a) The engine of the car (b) The driver of the car (c) The earth (d) The road

The correct answer is (d) The road Frictional force refers to the force generated by two surfaces that contacts and slide against each other.... View Article

How to find concentration of solution?

A solution is a homogeneous mixture of two or more components in which the particle size is smaller than 1 nm. A solution concentration is a... View Article

Write the 999 table

A maths table is a multiplication table that includes a list of multiples of natural numbers. Multiplication helps in solving maths problems... View Article

A simple pendulum of length ‘l’ carries a bob of mass ‘m’. If the breaking strength of the string is 2mg. The maximum angular amplitude from the vertical can be:

Given Tmax=2 mg Length of pendulum =l Mass of bob = m Find out We have to determine the maximum angular amplitude from the... View Article

How to find divisors of a number?

A divisor is an integer that divides another integer to produce a result. The number which is divided is called the dividend and the result... View Article

If LCM of a and 18 is 36 and the HCF of a and 18 is 2, then the value of a is_________

Answer: a is 4 The Least Common Multiple (LCM) is a way of finding the smallest common multiple between any two numbers or more. A common... View Article

What is the change in momentum of a car weighing 1500 kg when its speed increases from 36 km/h to 72 km/h uniformly?

product of the mass of the object and its velocity. If both the objects are not experiencing any external forces, then the total momentum of the... View Article

A straight wire of diameter 0.5 mm, carrying a current of 1A is replaced by another wire of 1mm diameter carrying the same current. The strength of magnetic field far away is

When we move further away from the wire, the magnetic field decreases with the distance. Ampere's law is the equation gives the magnetic field at... View Article

The Coordination number of ccp is ____

Cubic Closed PackingIn cubic close packing, the spheres of the third layer are not aligned with those of either the first or the second layer. So... View Article

Express 45 in binary

A binary number system is one of the four types of the number system. In computer applications, where binary numbers are represented by only two... View Article

In an α-decay the kinetic energy of α particle is 48 MeV and Q-value of thereaction is 50 MeV. The mass number of the mother nucleus is______

Alpha decay is a nuclear decay process where an unstable nucleus changes to another element by shooting out a particle composed of two protons... View Article

Mention the difference between primitive and intensive subsistence farming

Agriculture is the name of this practice of crop cultivation. Agriculture is the art of growing food and cash crops for the basic... View Article

Is every rectangle a square?

Let us know about rectangles and squares. A rectangle is a type of quadrilateral, whose opposite sides are equal and parallel. It is a... View Article

Alternating current is transmitted to distant places at (a) high voltage and low current (b) high voltage and high current (c)low voltage and low current (d) low voltage and high current

The correct answer is (a) high voltage and low current An alternating current can be defined as a current that changes its magnitude and... View Article

47 factors are___

Factors A number is said to be a factor of any other second number, then the first number must divide the second number completely without... View Article

Few q charges are placed at the vertices of cube find electrostatic force. Determine the potential and electric field due to this charge array at the centre of the cube.

The space around an electric charge in which its influence can be felt is known as the electric field. The electric field intensity at... View Article

The energy equivalent of 0.5g of a substance is ___

This equivalence of mass and energy is a consequence of Einstein’s theory of special relativity. Which simply means that mass can be... View Article

Two parallel large thin metal sheets have equal surface charge densities (σ=26.4×10−12c/m2) of opposite signs. The electric field between these sheets is:

When two parallel plates are connected across a battery, the plates are charged and an electric field is established between them, and this setup... View Article

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