Salt solution freezes at a temperature a few degrees below the freezing point of pure water. You have to investigate how the temperature of some salt solution changes as it is cooled from +20°C to -20°C. You are provided with an electronic thermometer and a freezer, which is set to give a temperature of -20°C. Describe in words and/or with a diagram how you would set about this task.

sonar - device which is used to find the submit submarines, sankalp ship. sonar waves consists of a transmitter and detector which are installed in the observation centre on board of a ship. the ultrasonic waves are sent into the sea at high frequency about 1000 khz in all direction.

the components of a vector are the parts of the vectors that are to each other.

b perpendicular

1 is a answer of a question