A parsec, a unit of distance used to measure the distance related to the stars in the sky, is equal to

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