Data Interface Between The Information System

A cubical block of wood 10 cm on a side floats at the interface between oil and water with its lower surface horizontal and 4 cm below the interface. The density of oil is 0.6 gcm^(-3) . The mass of block is

A cubical block of wood 10cm on a side floats at the interface between oil and water, as in fig. with its lower face 2 cm below the interface. The intensity of the oli is 0.6 g cm^(-3) . The mass of the block is

Two soap bubble of radii 3 mm and 4 mm are in contact radius of curvature of interface between those two bubbles is

When light suffers reflection at the interface between water and glass, the change of phase in the reflected wave is

Which of the following is contained on chip connected to the system board and is holding area for data instruction and information? (processed data waiting to be output to secondary storage)