Which statement explains why weather occurs more quickly in tropical rainforest? a. the dry conditions in tropical rain forests cause chemical weathering from blowing sand. b. the high moisture and humidity in tropical rain forests cause chemical weathering. c. the high, dry winds in tropical rain forests cause mechanical weathering. d. the high moisture and humidity in tropical rain forests cause mechanical weathering. this question isnt on here yet so im putting it up even though i already know the answer. do answer though so i doesnt get taken down and other k12 students can use it. oh sorry the answer was b.

Bone-strengthening physical activity done increases bone-mineral content and bone density in youth.

During physical science, ms. greene challenged her students to produce an energy transformation. james and jill wrapped a 4-inch nail with a coil of fifty turns of wire. they connected one end of the coil to one terminal of a knife switch. they connected the other terminal of the knife switch to the battery. finally, they connected the end of the coil to the other terminal of the battery. james held the tip of a 1-inch nail near the flat end of the 4-inch nail. jill closed the knife switch quickly and then opened it. the 1-inch nail was pulled toward the 4-inch nail. what is the best explanation of why the nail moved? a) electrical energy was converted to mechanical energy in the 1-inch nail. b) the 4-inch nail became an electromagnet and the magnetic force attracted the 1-inch nail. c) the electric current in the 4-inch nail was converted to mechanical energy in the 1-inch nail. d) the 4-inch nail had a positive charge and the 1-inch nail had a negative charge. opposites attracted.

Calculate the capacitance of a system that stores 2.0 x 10^-10c of charge at 100.0 v. use c=q/v. a. 2.0 x 10^-12 f b. 2.0 x 10^-8 f c. 5.0 x 10^11 f d. 5.0 x 10^7 f