Quiz: Can You Ace This 12th Grade Physics Quiz?: HowStuffWorks
Can You Ace This 12th Grade Physics Quiz?
By: Lauren Lubas
7 Min Quiz
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What does the E in E=mc^2 stand for?
While the E stands for the amount of energy that is released, the m stands for mass, and the c stands for the speed of light. This is Albert Einstein's Theory of Special Relativity.
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How is "speed" defined in terms of physics?
Speed is often considered the distance that something travels over a period or unit of time. Keep in mind that distance can be how far someone falls to how far someone runs. While time can be measured in various ways including seconds and minutes.
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Do you know what a light-year measures?
A light-year is the distance light can travel through space without interruption in a single year. By comparison, if an object were traveling at the speed of light, it would take it one year to reach the distance of a light-year.
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When it comes to electricity, what is wood considered to be?
Electricity flows through conductors. However, wood doesn't allow electricity to flow through it, so it is considered an insulator. If the wood is wet, electricity can flow through the water, but not the wood itself.
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Which numbers describe the state of energy of an electron?
Quantum numbers can be used for a variety of things. They generally help determine an electron configuration within an atom, and they help estimate the location of those electrons within an atom.
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Where does a paperclip have to be in order to be attracted to a magnet?
The magnetic field of an object is the space around the magnet that attracts other magnetic objects. Stronger magnets have wider magnetic fields, and can attract objects of varying magnetic degrees.
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Do you remember Newton's first law of motion?
The idea of the first law of motion is that as long as something is not disturbed, it will either continue in uniform motion or at rest. Keep in mind that resistance from air or other objects is considered an external force that acts upon the object in question.
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Why is it so difficult to hold a beach ball under water?
Buoyant force is the upward force on an object that is immersed in any fluid. If the object is lighter than the fluid, it will move upward. An object as light as a beach ball has a lot of buoyant force compared to the water in your pool.
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Which of these elements creates energy?
According to the Law of Conservation of Energy, energy itself cannot be created or destroyed. It can only be transferred from one form to another. This means that you can't simply synthesize energy in a lab.
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When something is moving in a straight line, what kind of motion is it using?
Rectilinear motion simply refers to something moving in a straight line. It isn't being affected or interrupted by any other objects or forces. Denser objects are more likely to move rectilinearly, because they are less affected by lower forces.
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Can you tell us the collective name for protons and neutrons?
Nucleons can be used as a term that represents either protons or neutrons within the nucleus of an atom. The total number of nucleons in an atom determines the mass number of the isotope.
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On the periodic table, what does an element's atomic number represent?
Each element on the periodic table has a specific number assigned to it. These numbers represent the amount of protons a single atom of that element has in the nucleus. This number often affects the atomic weight of the atom.
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What is it called when a sound wave bounces off something and you hear an echo?
Reflection doesn't just occur with light or things that you see. Sound waves can also reflect. The most perfect example of this is an echo. When a wave of any sort bounces off a boundary, it is reflecting.
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What is absolute humidity?
Humidity is the amount of water in the air. To find absolute humidity, you have to take an air sample, and find out how much water vapor is in it. Once you know how much water vapor is in the sample, you can compare it the size of the sample. The resulting ratio is considered absolute humidity.
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A pascal measures what?
Pascals are units of pressure that are equal to one Newton acting consistently (uniformly) over a 1m^2 area. They are normally used to measure the internal pressure or stress on something.
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Do you know what periodic motion is?
Though the intervals in any given periodic motion might be different, the definition is the same. Even if we only see something happen once a year, it is still considered periodic motion, because it can be predicted.
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"Each planet moves in an elliptical orbit, with the sun located at one of the foci" is what kind of law?
There are three laws of planetary motion, and they dig deep into how plants move around the sun. One of them even states that, "The square of the period of a planet is directly proportional to the cube of the radius of the semi-major axis of the orbit."
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When you blow up a balloon and let the air out, it returns close to its original shape. How is that balloon behaving?
Elasticity in an object is important for all things physics. If you've ever had to create a contraption that allows you to drop an egg off a balcony without it cracking, you did a lot of experimentation with elasticity of various materials.
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If you watch a pendulum swing, what are you witnessing?
Oscillatory motion can only happen if the object in motion has an equilibrium or a mean position. This is the position the object would stand at rest at. When you think of a pendulum, you see that it sways, but doesn't bounce. This is because of the oscillatory motion.
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At what temperature does motion stop completely?
Absolute zero is the temperature at which all motion ceases and vanishes, and nothing can move, including ions. The temperature is -273.16 degrees F or -273.15 degrees C. This theoretical temperature is 0 on the Kelvin scale.
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In what state does an amorphous item exist?
While amorphous substances can be jelly-like, jelly is considered a solid. The term amorphous refers to the fact that this substance does not have a clear shape or form that can be defined.
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What device produces coherent light by emitting radiation?
While lasers were all the rage in movies in the 1980s and '90s, they served an even greater purpose in the field of physics. They help scientists from all branches conduct experiments with distance and light.
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Someone throws a beach ball at you. You hit it. The ball changes directions. What determines how fast the ball changes directions?
According to the second law of motion, the rate of change is always directly proportional to the amount of force that was applied. Depending on how hard you hit the ball, the directional change will coincide with it.
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Do you know what the difference between temperature and heat is?
In the world of physics, it's important to know the difference between heat and temperature. The temperature is a measurement of the internal energy in a system, element or body. On the other hand, heat is the measurement of energy that is transferred from one thing to another.
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How many joules are in one calorie?
Few realize that a calorie is actually a unit of heat. One calorie is equal to 4,184 joules. This is the energy that is required to raise the temperature of 1 gram of water by 1 degree C.
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Bruce Banner was hit by high-energy photons and can now turn into the Hulk. What are these photons called?
Radioactive decay causes a lot of different types of radiation and the release of several different types of particles. Gamma rays create penetrating electromagnetic radiation from the decay of atomic nuclei.
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Do you know what isotopes are?
When atoms of the same element have different mass, it is because they have different number of neutrons. However, all of the atoms will have the same number of protons in isotopes.
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Which of these is NOT a unit of heat?
There are many different ways to measure heat. In most sciences, the measurement for heat is in joules. However, heat can also be measured in calories and BTUs (which stands for British Thermal Units) in the metric system.
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In the equation, K = 1/2mv^2, what does the K stand for?
Kinetic energy is how much energy a body has based on its motion. In the equation K=1/2mv^2, the m represents the mass of the body (or object) and v represents the speed at which it is going.
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Who created the laws of planetary motion?
As early as 1609, Johannes Kepler started creating the laws of planetary motion. Based on his observations, he ended up with three laws of planetary motion by 1619. These laws are still used to study the stars today.
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How do you find the mass number of something?
It is important to remember that the mass number of an element is different from the atomic number. In order to find the mass number, you have to add the number of protons and neutrons.
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Which law states that pressure exerted on a liquid is transmitted equally in all directions?
Pascal's law is essential for fluid mechanics and hydraulics. This law states that any pressure put on a fluid will be dispersed equally across the fluid. This is because fluid is able to move and adjust to the pressure.
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Can you tell us what an electron emitted from a nucleus that is in radioactive decay is called?
Beta particles move very fast, and they are always emitted by the radioactive decay of a substance. This emission of particles was once called a ray, and these particles are also known as beta radiation.
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If light waves are all vibrating in the same plane, what is that light called?
Polarized light is when light waves vibrate on the same plane, while unpolarized light is when they are vibrating on different planes. You can transform unpolarized light into polarized light through polarization.
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Which of these is something that affects how a sound wave is reflected?
There are a few things that affect how sound reflects off surfaces (also known as boundaries). Sound waves can reflect at angles, much like light, and the sound can be distorted as well.
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Light shining through a prism and creating a rainbow is also called what?
Refraction is the bending of light when it is passed through something. This bending of light is sometimes visible to the naked eye, in that it creates a rainbow effect, as the different colors bend.
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The swings at the park all go back to their resting position at some point. What force is making that happen?
Restoring force is the force that works to bring oscillating objects (like a pendulum or swing) back to its mean position, or resting position. This is the position that the swing is in naturally, and when there aren't outside factors, it can rest rather quickly.
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If an object is unaltered by outside force, what is it called?
Rigid bodies tend to have a fixed size and shape. Outside forces do not change the structure of the body when applied. The ability to remain unaltered allows scientists to study it better.
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When air has a relative humidity of 100%, what is it called?
Saturated air is air that allows evaporation and condensation to exist in equilibrium. This happens when two unsaturated air masses mix or the air cools. It often happens in the atmosphere.
Most of us are introduced to physics (as a science) in high school. Although before we are introduced we are we know that if you kick a ball, it will go in the direction you kicked, we simply don't know why. Well, physics is the "why" in this situation and every situation, but it's so much more than that. Physics can tell you how far that ball you kicked traveled, and how much force was used to get the ball to travel that far, that fast. The science and math behind physics can get overwhelming, especially for those who don't consider themselves "naturals" in either of these subjects.
12th-grade physics is a little simpler and eases students in (as much as something can be eased into the world of physics). It might not be the easiest science in the world, but do you think you can take on a 12th-grader in this subject?
According to the laws of motion, "An object at rest will remain at rest until a second object exerts force." This quiz is all about you becoming that force and working your brain hard. Remember that every action has an equal and opposite reaction, so start this quiz to see how we'll react to your genius!
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