Force & Motion
The distance an object travels during a specific time can be defined as?
Speed
If an object is in free fall, what is the only force that is acting upon that object?
Gravity
What is the study of sound is known as?
Acoustics
What is Thermal Capacity?
The energy required for an object to raise its temperature by 1 C / 1 K
What is the symbol for Silver on the periodic table of elements?
Ag
True or False: You must touch an object to apply a force to it?
False
What is the Law of Conservation of Energy?
Energy can neither be created nor destroyed, but only transferred and transformed.
Where does sound travel faster; water or air?
Water
Define specific heat capacity
The energy required for an object to raise its temperature of a unit of mass by 1 C / 1K
What is the estimated age of the universe?
13.8 billion years old
What is the name of the force pulling towards the center when an object travels in a circular motino?
Centripetal Force
Which famous physicist created the Universal Law of Gravitation?
Sir Isaac Newton
If you mix all of the colors of light together, do you get black, white, or a rainbow?
White light
What is Boyle's Law
Boyle's Law states that for a gas at a constant temperature, pressure × volume is also constant.
How does Newton discover about gravity?
he first thought of this system of gravitation which he hit upon by observing an apple fall from a tree
State Hooke's Law
Extension is directly proportional to the force/load up to the limit of proportionality
In a vacuum, which would hit the ground first if they were dropped from the same height and at the same time: a feather or a bowling ball?
They would hit at the same time
What travels at the fastest speed possible?
Speed of Light
Describe 3 types of thermal energy transfer
Conduction
Convection
Radiation
Which land animal is capable of covering the most distance in the least amount of time?
Cheetah
A spring, which obeys Hooke's Law, has an unstrentched length of 10 cm. A load of 20 N is suspended from the spring.
The new length of the spring is 36 cm.
What is the spring constant, k of the spring?
0.77 N/cm
Describe about 3 energy resources that is not derived from the Sun.
Geothermal
Nuclear
Tidal
Describe the application of Total Internal Reflection in a fiber optics
Fiber optics in telecommunications
Medical - endoscopy
Describe how vacuum flasks are used to keep hot drinks cool
(Material used, specifications for a vacuum flask)
Material - glass because good insulator
Air removed from the gap between walls- to reduce loss by convection and convection
silver coating - reduce loss by radiation
stopper - made of plastic - prevent loss by convection and evaporation
If the Earth could turn off gravity, what would the moon do?
Travel in a straight line