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Wigley Final

Physical Science Crovato

QuestionAnswer
The "Law of Inertia" is also known as ____________ Newton's 1st Law
What is a compound machine? a machine made up of 2 or more simple machines that operate together
What is power? rate of doing work
How many paths through which charge can flow would be shown in a circuit diagram of a series circuit? 1
A wet cell battery produces electrons from the chemical reaction between what 2 substances? sulfuric acid and lead
What is measured at a particular time? instantaneous speed
What are 2 examples of 2nd class levers? wheelbarrow and nutcracker
What does "milli" mean? 0.001
How many watts are in 1 HP? 746
What kind of friction occurs as a fish swims through water? fluid
According to Newton's second law of motion, the acceleration of an object equals the net force acting on the object divided by the object's______ mass
What type of current is produced by a battery? direct current
What law of motion describes action and reaction forces? Newton's 3rd law
An open parachute increases air resistance of a falling sky diver by __________ surface area increasing
What is work? transfer of energy
What is a drawback of solar energy? it depends on climate
What is an example describes constant acceleration due ONLY to a change in direction? traveling around a circular track
What type of graph is used to show how a part of something relates to the whole? circle graph
How are science and technology related? advances in science may lead to advances in technology and vice versa
What is a true statement about scientific theories? they may or may not ever be proven
What are 2 ways a machine can make work easier for you? by changing the direction of your force and by multiplying your force
What is a scientific law? a rule or principle that describes what happens in nature
What causes projectile motion? the downward force of gravity and an initial forward velocity
Reducing friction in a machine _______ its efficiency therefore producing more work output increases
What does "kilo" mean? 1000
Charges flow easily through what type of material? metal
How do wheels reduce the amount of friction? they reduce surface area between surfaces in contact
An electroscope is designed to detect an ______________ electric charge
What is the first step of the scientific method? state your problem
What type of energy is stored in gasoline? chemical eneregy
What is a system of knowledge and the methods used to find that knowledge? science
What would reduce the resistance of a metal wire? increasing it's thickness
What's the acceleration due to gravity of earth? 9.8 m/s/s
What would have high inertia? a jet plane sitting still on the runway
What the SI unit for temperature used in scientific measurement? kelvin
What are 3 factors that affect the amount of sliding friction between 2 objects? 1)weight of objects 2) type of surface 3) amount of lubrication on surfaces
What is resistance measured in? ohm
What's the SI unit of force? newton
If an object gains elections, it becomes __________ negatively charged
What devices are used to keep electrical circuits from overheating? circuit breakers and fuse
What is kinetic energy? energy of motion
Why is the gravitational potential energy of an object 1 meter above the moon's surface less than its potential energy 1 meter above Earth's surface? The object's acceleration due to gravity is less on the moon.
As you push a cereal box across a tabletop, the sliding friction acting on the cereal box __________________________________ in the direction opposite of motion
In the equation for acceleration, how can you describe acceleration if the numerator is negative? Slowing down or deceleration
As an astronaut travels far away from Earth, her weight decreases because ____ decreases gravity
Why might an orange roll off your cafeteria tray when you stop suddenly? because of the oranges inertia
What is an ax an example of ? wedge
Most circuits in your home are ______________ parallel circuits
Walking converts what type of energy into mechanical energy? chemical
A benefit of a hydrogen fuel cell is that its byproduct is __________ water
A machine is a device that can multiple ______ force
What the SI unit of power? watt
How can you tell if an object is accelerating? it speeds up, slows down or changes direction
A horizontal line on a distance-time graph means the object is _______ at rest
Created by: dcrovato