Class 11th

Explain the concept of chemical bonding.

In Chemical bonding, what are the four types of bonds?

A 10 N force is applied on a body produce in it an acceleration of 1 m/s². The mass of the body is

Two blocks of masses 6 kg and 4 kg are connected by a rope of mass 2 kg are resting on a frictionless floor as shown in the following figure. If a constant force of 60 N$$ is applied to 6 kg block, then the tension in the rope at points A,B$$ and C$$ are, respectively, given by

Determine the energy required to launch a satellite of mass m from the surface of a planet of mass M and radius R in a circular orbit at an altitude of 3R

The surface are frictionless, the ratio of T$$ l and $T_2$ ${}_{}$ is 

Suppose the gravitational force varies inversely as the $n^{th}$ power of distance. Then, time period of a planet in circular orbit of radius R around the sum will be proportional to

A metal wire of uniform mass is used as simple pendulum. If the temperature of metal wire is increases by   $10°C$ and coefficient of linear expansion of the wire is 2 * 10^-6   $°C^{-1},$ the time period of pendulum will increase by

The equation of a wave traveling on a string is y = 10sin $\left[\pi \left(5t-\frac{x}{4}\right)\right],$  where x, y are in cm and t is in second. The velocity of wave is

An observer moves towards a stationary source of sound with a velocity one-fourth of the velocity of sound. What is the percentage increase in the apparent frequency?