Definitions
Define Scalar and Vector
A quantity that only has a magnitude. A quantity that has both magnitude and direction.
Which star is closest to the Earth?
The Sun.
The next closest star would be Proxima Centauri in the Alpha Centauri solar system that is actually a triple star system.
Which physicist is more famous for his imaginary cat than for his equation?
Erwin Schrodinger was a Nobel Prize-winning Austrian-Irish physicist who developed a number of fundamental results in quantum theory: the Schrödinger equation provides a way to calculate the wave function of a system and how it changes dynamically in time.
He also came up with a thought experiment involving a cat to explain the nature of quantum phenomena.
True or False
An object moving at constant speed must also have constant acceleration.
True, an object moving with a constant (unchanging) speed has a constant acceleration of 0 m/s/s
_____________ is the tendency of an object to keep moving or stay at rest.
Inertia (directly related to mass of the object)
List and define Newton's Three Laws
1 - Law of Inertia
2 - F=ma
3 - Equal and opposite reaction
What is the smallest country on Earth?
Vatican City
What name is given to the science of sound?
Acoustics is a branch of physics that deals with the study of mechanical waves in gases, liquids, and solids including topics such as vibration, sound, ultrasound and infrasound.
A car accelerates from rest at a rate of 8 m/s/s. How fast is the car going after 2.5 seconds?
20 m/s
What is the weight of an 80 kg person near the surface of the Earth?
784 Newtons
What is a force?
A push or a pull that may change an object's state of motion.
What is the primary factor that causes the Earth to have seasons?
The Earth is tilted on its axis by about 23 degrees.
If you mix all colors (frequencies) of visible light do you get black, white, brown, or rainbow?
White. Adding all colors of light together is called color addition, while adding all colors of paint together is called color subtraction. A rainbow happens because of light reflection, refraction and dispersion.
An object starts at 5 m/s and then speeds up to 15 m/s in a span of 8 seconds. What is the average speed of this object?
10 meters per second
According to Newton's Laws of Motion, how many different types of motion are there and what are they?
2 types: accelerated and non-accelerated motion.
Define the Normal Force
The force that appears when a surface is pushed on.
The force acts opposite to the pushing force and perpendicular to the surface being pushed on.
A baseball bat and a ball cost $1.10 together, and the bat costs $1.00 more than the ball, how much does the ball cost?
Ball must cost $0.05, and the bat must cost $1.05
Which of the following is not a form of energy and why?
Light, Friction, Heat or Sound.
Friction is a force – a push or a pull that can cause a mass to accelerate. A force is a way of transferring energy from one object to another or one state to another. In the case of friction, kinetic energy (the energy of motion) is transferred to molecules when two surfaces rub together, causing them to heat up.
A car travels a distance of 200 meters in 10 seconds. The car then travels at 10 m/s for the next 30 seconds. What is the average speed of the car?
12.5 meters per second
A single proton is pushed with a 1 Newton force. What is the acceleration experienced by the proton due to the force?
6x10^26 m/s/s
What is a frame of reference?
In physics and astronomy, a frame of reference is an abstract coordinate system whose origin, orientation, and scale are specified by a set of reference points―geometric points whose position is identified both mathematically and physically.
For example, the Cartesian coordinate system (x and y axis from math). Or latitude and longitude.
In your cellar there are three light switches in the OFF position. Each switch controls 1 of 3 light bulbs on the floor above.
You may move any of the switches any number of times but you may only go upstairs to inspect the bulbs one time. How can you find the switch for each bulb with one inspection?
Number the switches 1, 2 and 3.
Switch on number 1 for 1 minute, then switch it off. Switch on number 2. Go upstairs...
The light that is on is connected to switch 2. The light that is off and warm is connected to switch 1. The light that is off and cold is connected to switch 3!
Who is the only person to win a Nobel Prize in both physics and chemistry?
Marie Curie, the first-ever person and the only woman yet to receive two Nobel Prizes, is also the only person to receive the same for two different sciences. Marie won the 1903 Physics Nobel along with husband Pierre Curie for joint researches on radiation phenomena. She also won the Chemistry Nobel in 1911 for discovering and studying polonium and radium.
What is the final velocity of an object that is thrown vertically downwards with an initial speed of 2 m/s and falls for 5 spooky seconds?
About 52 meters per second, downward.
Two forces can produce a maximum net force of 143 Newtons together. The same two forces can produce a minimum net force of 33 Newtons.
What are the two forces?
55 Newtons and 88 Newtons.