A student is trying to design an artificial eardrum for their science fair project. They made their eardrum hollow to cut down on cost and weight. When they tested how long it took their test subject to hear a beep, they found that their control eardrum made out of wood did better than their created one. The temperature that day was 98°F. Determine which statement supports the student’s findings. A.
The created eardrum did not perform well because sound travels faster in solids due to the large distance between the particles.

B.
The created eardrum did not perform well because sound travels faster in solids due to the small distance between the particles.

C.
The created eardrum did not perform well because sound travels slower through the air in high temperatures due to the particles moving slower.

D.
The created eardrum did not perform well because sound travels slower in the air due to the small distance between the particles.

Which of the following changes to a pipe would increase the conductance by a factor of 12? 1.quadrupling the length and tripling the radius.2.reducing the length by a factor of and doubling the radius.3.tripling the length and reducing the radius by a factor of .4.reducing the length but a factor of and doubling the radius.

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.

Classify each possible hypothesis about a medicinal aloe vera plant as falsifiable or non-falsifiable. aloe vera gel is the best natural skin moisturizer. aloe vera gel can heal wounds by boosting cell renewal. aloe vera juice tastes better than carrot juice. drinking aloe juice can reduce the risk of lung cancer.