PS Final Exam II Question Preview (ID: 47069)


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A coil of wire that has a soft iron core and that acts as a magnet when an electric current is in the coil is called a(n)
a) ferromagnet
b) electromagnet
c) permanent magnet
d) temporary magnet

Air rushes into your lungs when you inhale because
a) it contains oxygen
b) the pressure inside the lungs is higher than outside the body
c) a muscle moves upward and decreases the space in your chest
d) fluids flow from areas of high pressure to areas of low pressure

How does a ramp make lifting a heavy object easier?
a) The object is moved over a shorter distance
b) The ramp increases the amount of work you do
c) Less force is needed to move the object over a longer distance
d) More force is needed to move the object over a longer distance

Your house is an example of what type of circuit?
a) Series
b) Centripetal
c) Parallel
d) Magnetic

Mendeleev arranged the elements by
a) density
b) melting point
c) appearance
d) increasing atomic mass

Who first discovered naturally occuring magnetic rock?
a) Native Americans
b) Greeks
c) Chinese
d)

When two or more elements join together chemically,
a) a compound is formed
b) a mixture is formed
c)
d)

Which part of the atom has a positive charge?
a) positronium
b) electron
c) neutron
d) nucleus

When you wind a rubber band on a toy airplane what type of energy does the rubber band have?
a) kinetic energy
b) elastic potential energy
c)
d)

If a tennis bal, a solid rubber ball, and a solid steel ball were dropped at the same time from the same height with no air resistance, which would hit the ground first?
a) all at the same time
b) rubber ball
c) steel ball
d)

What do you call the energy of motion?
a) potential energy
b) kinetic energy
c)
d)

Greg applies a force of 100 N to move a box 5 meters. How much work did he do?
a) 100 J
b) 500 J
c) 5 J
d) 500 N

A book weighs 6 N. If the acceleration of gravity is 9.8 m/s/s what is the mass of the book in kilograms?
a) 6.1 kg
b) 59 kg
c) 1.6 kg
d) 0.61 kg

A construction worker is lifting a load of bricks onto a truck. He does 200 J of work in 40 seconds. What is his power output?
a) 50 J
b) 5 J
c) 50 W
d) 5 W

What is the voltage if the current is 4 A and the resistance is 10 ohms?
a) 4 V
b) 40 R
c) 10 V
d) 40 V

What is a device that makes work easier by changing the size or direction of the force?
a) power
b) watt
c) machine
d) force

What is the SI unit for pressure?
a) drag
b) bernoulli
c) pascal
d) archimedes

When a fluid flows from area A to area B, area A is an area of greater
a) temperature
b) maws
c) volume
d) pressure

When acids and bases come in contact with each other, they
a) explode
b) become bitter
c) make hydroxide
d) neutralize each other

If a spoonful of salt is mixed in a glass of water, what is the water called?
a) solute
b) solvent
c)
d)

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