Where did agriculture probably first begin?

a. middle east

b. america's

c. australia

d. canada

A pulley stems has an efficiency of 65.1%. If you perform 350 J of work, how much useful work does the pulley perform? A. 350 J B. 301 J C. 228 J D. 122 J

What happens to the resource when competition for it increases

R1=3 ohms R2=6 ohms R4=18 ohms R5 = 15 ohms R5=9 ohms 90 volts What is the current running through the entire circuit?

A battery is used to?

C) Does the mass of an object affect its air resistance? Why or why not?

The tip of a triangle is held 12.0 cm above the surface of a flat pool of water. A submerged swimmer in the pool sees the tip of the triangle at what distance above the water? Let the indices of refraction nwater = 1.33 and nair = 1.00.

What is a lever used for?

What did the romans build as a step toward environment management

Accelerations are produced by equal forces or unequal forces?

A wave travels through a medium. As the wave passes, the particles of the medium vibrate in a direction perpendicular to the direction of the wave's motion. The wave is a. longitudinal. c. electromagnetic. b. a pulse. d. transverse.