Model	Price	Amazon Rating	Type of Binding Machine	Method of Punching	Punching Capacity	Binding Capacity
Fellowes Pulsar 300	$100-200	4.4	Comb Binding	Manual	15 sheets	300 sheets with a 1-1/2" comb
GBC CombBind C20	$100-200	4.7	Comb Binding	Manual	20 sheets	330 sheets
Fellowes Pulsar E 300	$200-300	4.6	Comb Binding	Electric	15 sheets	300 sheets with a 1.5" comb
Akiles RubiCoil	$100-200	N/A	Coil Binding	Manual	10 sheets	N/A
GBC ProClick P50	$50-100	4.1	Wire Binding	Manual	6 sheets	100 sheets

Q&A: I NEED HELP ON SCIENCE PLEASE HELP ME?

Tuesday, September 7th, 2010 at 4:20 am

Question by spiderpig: I NEED HELP ON SCIENCE PLEASE HELP ME?
4. The energy that is released in motion of a system is called: (1 point)

potential energy
kinetic energy
translational energy
formational energy

For questions 8–11, identify which type of simple machine each of the following objects represents.

8. door on a hinge (1 point)

wheel and axle
pulley system
wedge
screw
lever

9. bottle opener (1 point)

wheel and axle
pulley system
wedge
screw
lever

10. roller skates (1 point)

wheel and axle
pulley system
wedge
screw
lever

11. screwdriver (1 point)
wheel and axle
pulley system
wedge
screw
lever

Sound is ___. (1 point)

a drop in air pressure
a vibration of molecules
an increase in temperature

17. Which part of the human ear vibrates to receive sound? (1 point)

outer cortex
inner canal
eardrum
cranial nerve

18. Which of the following statements is true about sound? (1 point)

it requires a medium
it can travel in a vacuum
it is not a wave
it does not have a frequency

19. Sound with a high frequency also has
(1 point)

a long wavelength
a short wavelength
a high amplitude
a low amplitude

20. Who is often credited for the discovery of electricity? (1 point)

Thomas Edison
Benjamin Franklin
Albert Einstein
Democritus

21. The term static in static electricity means (1 point)

flowing electrons
flowing protons
non-moving build up of charge
discharge of electrical build-up

22. Electricity is the flow of which subatomic particles? (1 point)

electrons
protons
neutrons

23. Static electricity causes socks to stick together in the dryer, and a charged balloon to stick to the wall. Why does this happen?
(1 point)

like charges attract
like charges repel
opposite charges repel
opposite charges attract

24. Which of these phrases best describes lightening? (1 point)

a discharge of protons that cools the surrounding air
a discharge of electrons that heats the surrounding air
a discharge of protons that heats the surrounding air
a discharge of electrons that cools the surrounding air

25. An electrical current will travel through a metal. Metals are ____. (1 point)

conductors
insulators
carbon grids
silicon chips

26. Rubbing your feet across the carpet or a balloon across your hair will transfer a charge. Which of these statements best explains why this takes place? (1 point)

protons are found in the outer areas of the atom and may be removed by rubbing materials together.
the highly charged electron remains tightly bound in the nucleus and provides a static charge
electrons are found in the outer areas of the atom and may be removed by rubbing materials together
protons of the nucleus are easily transferred between materials

27. A build up of negative electrical charge is (1 point)

AC power
DC power
nuclear electricity
static electricity

Best answer:

Answer by Leena Gill
4.) Kinetic
27.) Static
26.) Electrons are found
25.) Conductors