In a ripple tank experiment to demonstrate interference, two point sources having a common frequency of/6.0 HZ are used. The sources are 5.0 cm apart and are in phase. A
metre stick is placed above the water, parallel to the line joining the two sources. The first
nodal lines (one on either side of the central axis) cross the metre stick at the 35 cm and
55 cm marks. Each of the crossing points is 50 cm from the midpoint of the line joining
the two sources. Calculate the wavelength and speed of the waves.

e/c, where e is its total energy

answer a fan shaped mass of sediment deposited at the base of a mountain front do to an abrupt change in stream gradient;

the answer is false. this is because for ice to melt, it requires latent heat of melting. latent heat means heat energy required to change phase without any increase in temperatures. therefore, the ice will take energy from the environment to melt hence atmospheric temperatures will reduce.

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.