Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Science Final
| Question | Answer |
|---|---|
| Why can you fill a balloon with air by blowing in it? | Because particles of a fluid always fill out to fill their container |
| ()'s Principle explains how a hydraulic lift works | Pascal's |
| () Law explains why heavy objects can float if they displace enough water. | Archimedes |
| The SI unit of pressure is named after the scientist who discovered that pressure is | Transmitted equally throughout an enclosed fluid |
| Ice floats on water because water has: | Greater Density |
| The ability of a fluid to exert upward force on objects placed in the fluid is known as: | Bouyancy |
| The buoyant force acting on an object in the fluid equals the: | Weight of the fluid displaced by the object |
| Newton's first law of motion is called the law of: | Inertia |
| If you run into a curb on your bike, you might fly over the handlebars because of: | Intertia |
| Inertia causes a stationary object to: | Remain Stationary |
| Which if the following is an example of a third-class lever: | Hockey stick |
| The ideal mechanical advantage of a pulley equals the: | Number of rope segments lifting up the object |
| Which of the following is the best definition for deceleration? | Negative acceleration |
| An object at rest will stay at rest, so long as the net force acting on it is: | Zero |
| Why do ball bearings reduce friction in a wheel? | Rolling friction is less than sliding friction |
| Newton's law of universal gravitation states that gravity: | (ALL OF THEM) |
| The SI unit for pressure is called the: | Pascal |
| What type of friction do you use when you use when you put the brakes on to stop a bike? | Sliding friction |
| The SI unit for weight is: | Newton |
| Why is force a vector? | It has size and direction |
| On earth, a mass of one kilogram exerts a downward force due to gravity of about: | Ten Newtons |
| It is harder for people to breathe adequate amounts of oxygen at high altitudes because: | Air pressure is lower at higher altitudes |
| If the ideal mechanical advantage of a machine equals one, then the actual mechanical advantage must equal: | Less than one |
| If two forces act on an object in the same direction: | The net force equals the sum of the two forces |
| If motion is represented by an arrow, what does the head of the arrow show: | Direction |
| One newton is defined as the amount of force that causes: | A mass of one kilogram to excel to one meter per second squared |
| Frame of reference is: | Something that affects perception of motion. |
| The only reason a leaf falls to a ground slowly is because: | It has more air resistance |
| Assume you apply ten pascals of pressure to the head of a thumbtack, how much pressure is applied to the cork-board? | More than ten Pa |
| If you apply 20 N of force to the handle end of a canoe paddle, how much force might the paddle end apply to the water? | 10 N |
| Simple machines in a pair of scissors include | two levers and two wedges |
| One horsepower is about equal to: | 745 Watts |
| Which of the following is a second class lever? | a wheelbarrow |
| Compound machines include all of the following except a: | Chisel |
| A compound machine tends to be less efficient than a simple machine because a compound machine: | has more moving parts and thus, more friction |
Created by:
aestes