What is measured with the Nephometer?

 

An echo is returned in 3 s. What is the distance of the reflecting surface from the source, considering the speed of sound as 342 ms-1?

A 5 kg object is raised through a height of 4 m. The work done by the force of gravity acting on the object is (take g = 10 m/s2)

Any body kept in a fluid experiences an upward force called _____________.

Find the resistance (in mega Ω) of a wire of length 10 m, cross sectional area 1 cm2 and made of a material of resistivity 100 Ωm.

A charge of 2 C passes from one point to the other in a circuit. If the potential difference between the two points is 5 V, the amount of work done is

An object is placed at the centre of curvature of a concave mirror. Its image is formed at

The energy released at the end of digestion is in the form of

Which of the following physical quantities changes or tends to change the state of rest or of uniform motion of a body in a straight line?