10) Ecotourism involves which of the following? A. Development of folk art
B. Development of local irrigation and terracing systems
C. Travel with the desire to view, sustain, and support natural ecosystems and local
cultures.
D. Water purification by soils and wetland plants
E. Using the chemical nature of spider's silk to design strong, lightweight fibers

In a vernier instrument the main scale is in 1/2 mm divisions .vernier is made by redividing 19 such divisions into 20 equal parts. calculate the least count of the instrument.

How many hydrogen (h) atoms are in one molecule of sulfuric acid, h2so4? (1 points) 1 2 4 7

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.