something in the 7th grade area
2006-12-07 13:47:10 · 7 answers · asked by Rob M 1 in Education & Reference ➔ Homework Help
I once did this cool little experiment with two yard sticks and two funnels stuck together. I put the two yardsticks at an incline in a V shape. The open V side is on the upper side of the incline. Then, you glue to funnels together at the large opening. Use large funnels - like the kind you would use for changing the oil in a car. For the incline, use 2 thick books. Once the funnels are stuck together, you put them at the closed end of the two yardsticks (the point) and watch the funnels travel up the yardsticks. Its pretty cool.
Also, you can do this one... try to figure the center of gravity for an odd figure. Draw any kind of figure that you want. Cut it out. You might want to make it out of card board or poster board. It can be a blob shape if you want it to be. Then you get a string with a heavy object. Pin the blob shape to the wall and the piece of string with the heavy object to an upper side of the shape. Trace with a pencil where the string is hanging. Then turn the shape and do the same thing. Do this with several turns of the shape. As you do this, you can see where the lines intersect - this is the center of gravity for the odd shape that you have drawn.
Hope this helps! I LOOOOOOVE science! :o)
2006-12-07 14:04:07 · answer #1 · answered by cristabel80 2 · 0⤊ 0⤋
build a small motor
150cm coil of wire (copper coated?)
1 field pole
1 base plate
2 armature halves
1 pc insulating tubing 4cm longcut into 4 equal pcs
1 moter shaft 6.5 cm long
2 communicator insulators black 1 cm diameter with three holes
2 brushes bent at 90 degree angles
2 shaft supports
10 paper fasteners
1 sturdy cardboard approx 2 1/2 inches by about 4 inches
1 1/2 volt dry cell
sharp knife or razor blade needed
2006-12-07 14:30:15 · answer #2 · answered by I-o-d-tiger 6 · 0⤊ 0⤋
what is the effect of salt on the freezing time of water
take two identical cups
fill one with 8 oz. distilled water
fill one with 8 oz. salt water
put both cups in the freezer
time which one freezes faster
2006-12-07 13:54:42 · answer #3 · answered by Christie 3 · 0⤊ 0⤋
go to the library or something they have books on science fair topics or just do your project on something that is of intrest to you
2006-12-07 13:55:02 · answer #4 · answered by Emma 1 · 0⤊ 0⤋
Rob M You are on newspaper!
http://www.osoq.com/funstuff/extra/extra01.asp?strName=Rob_M
2006-12-07 14:03:49 · answer #5 · answered by emc g 1 · 0⤊ 0⤋
how bout plant cell molecules? or the effects of a vegan diet in modern society
2006-12-07 13:55:58 · answer #6 · answered by cha cha pop 2 · 0⤊ 0⤋
lemon powered lightbulb
2006-12-07 13:55:48 · answer #7 · answered by Dennis D 2 · 0⤊ 0⤋