In which of the following media is the speed of sound the least?
Which of the following characteristics of waves can a ripple tank be used to demonstrate?
I. Reflection
II. Refraction
III. Diffraction
Which of the following graphs gives the correct relationship between energy and mass when mass is converted to energy.
An 800 kg car moving at 80 km hr\(^{-1}\) collides with a 1200 kg car moving at 40 km hr\(^{-1}\) in the same direction. If the cars stick together, calculate their common velocity.
The mass of a load is doubled while the force acting on it is halved. The resulting acceleration of the load is
