Match the following:
A. Morphine is a sedative and pain killer, so it matches with III.
B. Heroin is a depressant and slows down body functions, so it matches with I.
C. Cannabinoids have effects on the cardiovascular system, so they match with IV.
D. Cocaine produces a sense of euphoria and increased energy, so it matches with II.
Final Answer:
A - III, B - I, C - IV, D - II
The percentage error in the measurement of mass and velocity are 3% and 4% respectively. The percentage error in the measurement of kinetic energy is:
If \( L, M, N \) are the midpoints of the sides PQ, QR, and RP of triangle \( \Delta PQR \), then \( \overline{QM} + \overline{LN} + \overline{ML} + \overline{RN} - \overline{MN} - \overline{QL} = \):