To see from submarine and the ship at the surface of water, we use:
Telescope
Microscope
Periscope
Prism
The displacement produced in the spring is directly proportional to force is called:
Hook’s law
Boyle’s law
Newton’s law
Joule’s law
Which of the following devices can be used to produce both a transverse and longitudinal waves:
A string
A ripple tank
A helical spring (slinky)
A tuning fork
The phenomena used in capacitor is:
electrostatic induction
induced current
electric field
electroscope
