Which device is used in submarines to see things above the level of the sea?

A. power B. heat C. light D. distance

A. Weight and Velocity B. Weight and Force C. Weight and Mass D. Weight and Acceleration

A. cannot be measured B. can be expressed in the form of law C. can be represented completely by its magnitude and unit D. Both B and C

A. a-2, b-3, c-1, d-4 B. a-2, b-3, c-4, d-1 C. a-1, b-3, c-4, d-2 D. a-4, b-3, c-2, d-1