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Kinematics
Kinematics is the study of how a body moves. This includes linear motion, angular motion, and rotational motion.
3,459 Questions
What is Relation between temperature and kinetic energy?
In an ideal gas of monatomic particles, the average kinetic energy is
<K>=(3/2)*k*T
In a more general ideal gas, the average energy of each particle is
<K>=(d/2)*k*T
where d is the number of degrees of freedom. There isn't a clear distinction between kinetic and potential energy for general degrees of freedom.
For normal (non-negative) temperatures, as temperature increases, so does energy. The exact relation depends on the entropy of the system.
T=dU/dS, where d is the partial derivative.
http://en.wikipedia.org/wiki/Equipartition_theorem
http://en.wikipedia.org/wiki/Ideal_gas
Does the kinetic energy of a system change during a phase change?
This seems like a question from an electrical course, and is probably best answered by your course materials.
It's your test question, not ours, and there won't always be someone to ask the answer of. Earn your diploma.
Haha, whoever wrote that is Just mean.
He or she wrote it here because they didnt understand it and wanted to knowledge of our community we call earth (sharing is caring).
Anyhoo during a phase change (lets use the example of ice to water) ice to water is the phase change. When heat is added the particles move, but the energy isn't used for it for movement, instead its for breaking the bonds. And kinetic energy is energy from movement. Thus, nope its potential energy that is being changed.
Gl to all those kids/teens/adults that search this question! I was too pissed when i didnt come up with an answer for this question, and its mean ppl like the one above me who make it worst for us cram-last-minute people =)
Is frequency a scalar or vector quantity?
Frequency is a scalar quantity,now comes the question how to decide which one is scalar and which one is vector,scalar quantities are those which only have values and we can't assosciate any direction to them ,whereas,vector quantities are those which have values as well as directions assosciated with them.For example,time is a scalar quantity because we say its 10:30 pm we never say its 10:30 pm south-west,where as if we say the wind is blowing at 30 m/sec towards north(this particular thing is called velocity)then it is a vector quantity. some more examples:-300 degree celcius(scalar),76.8%(scalar),5 meters north(vector)
How do I convert kilometers per hour?
You didn't actually say what you wanted to convert the "kilometers per hour" to, but let's take a wild guess and say you wanted to convert them to MPH. The fastest calculation you can easily make in your head is multiply by 5, and then divide the result by 8. (It's a 1.6 ratio, give or take) So if I wanted to convert 80 kilometers per hour, I'd multiply that number by 5 to get 400, and divide by 8 to get 50MPH. Try converting 88 kilometers per hour and see if you can get it done in your head. :)
Is chemical energy important to us people?
Yes, chemical energy is important to humans as it is the energy stored in the bonds of chemical compounds and is released during chemical reactions, such as metabolism. This energy is essential for fueling our daily activities, providing us with the energy needed for growth, movement, and bodily functions.
What lab equipment is used to measure length?
There are many instruments to measure lengths. But selection of measuring device depends on the maximum length it can measure. For example a small ruler used in schools can measure maximum 15 centimeters (or 6 inches).
Here is a list of some measuring devices for measuring length:
1. Ruler (also known as scale) max 30cm
2. Meter Rod (that used by tailors or cloth sellers), max 100 cm
3. Measuring Tape (used by surveying engineers)
For measuring very large distances travelled,
In vehicles, speedometers also have distance measuring display. Ships use knots for measuring nautical miles.
What does a strike mean in bowling?
A strike is a thing they called by a umpier in history, a strike would be when someone stops work to get better pay, or shorter hours or to even force an employer to agree to meet some other demand.
The exciting force is the moment that follows the introduction (also called exposition or set-up) of a drama and initiates the rising action (also called development); it consists of a resolution on the part of the protagonist or the primary antagonist to accomplish some major goal, the pursuit of which constitutes the chief action of the play. It is to be distinguished from the exciting cause, which is that part of the introduction that provides the primary motivation for the exciting force.
* In Antigone, the exciting cause is Creon's announcement that anyone who buries Polyneices will be put to death; the exciting force is Antigone's resolution to bury her brother. * In Hamlet, the exciting cause is the Ghost's announcement of his murder to Hamlet, followed by a command to take revenge; the exciting force is Hamlet's resolution to avenge his father's murder. In a five-act play, the exciting force usually occurs at or near the end of the first act, or sometimes at the beginning of the second act. If there are any subplots, each individual subordinate action will have its own exciting force.
What is an example of balanced forces?
See if you can make one:
A force is a push or a pull. A force can give energy to an object causing the object to start moving, stop moving, or change its motion.
Forces occur in pairs and can be either balanced or unbalanced. Balanced forces do notcause a change in motion. They are equal in size and opposite in direction.
Have you ever had an arm wrestling competition with someone? If you compete against someone who is just about as strong as you are, there will probably be a time when both of you are pushing as hard as you can, but your arms stay in the same place. This is an example of balanced forces. The force exerted by each person is equal, but they are pushing in opposite directions, in this case together. It would look something like this.
Because the force that each of you is exerting is equal, the two forces cancel each other out and the resulting force is zero. Therefore, there is no change in motion.
Another great place to see balanced forces in action is in a tug of war. This is similar to an arm wrestling match, only in this case the forces are moving away from each other. Just like in arm wrestling, if the two teams have equal strength, or force, the rope will stay pretty much in the same place. It would look like this.
Again the resulting force is zero and there is no change in motion.
Unlike balanced forces, unbalanced forces always cause a change in motion. They are not equal and opposite.
When two unbalanced forces are exerted in opposite directions, their combined force is equal to the difference between the two forces and is exerted in the direction of the larger force. Look at the following examples to help make this more clear.
Think again about the arm wrestling match. Only this time imagine that you are competing against a world famous body builder. Chances are that his force will be much greater than yours. Your arms will move in the direction he is pushing with a force that is equal to his force minus your force. It will look like this.
Or imagine that you and your friends are having a tug of war with the U.S. olympic weight lifting team. Again their force will probably be a little larger than yours. You will move in the direction they are pulling with a force that is equal to their force minus your force. It will look like this.
Unbalanced forces can also be exerted in the same direction. For example, imagine that your family's car breaks down on the road and you have to push it into a parking lot. If you and your brother or sister both push on the car, the resulting force on the car will be the sum of your forces and of course be in the direction that you are applying the force. The figure below shows how this would work.
Two important things to remember when working with balanced and unbalanced forces are 1) forces in the same direction combine by addition, and 2) forces in oppositedirections combine by subtraction.
Try these problems to test your knowledge about balanced and unbalanced forces.
1.Two tugboats are moving a barge. Tugboat A exerts a force of 3000 newtons on the barge. Tugboat B exerts a force of 5000 newtons in the same direction. What is the combined force on the barge?
2.Draw arrows showing the individual and combined forces of the tugboats in #1.
3.Now suppose that Tugboat A exerts a force of 2000 newtons on the barge and Tugboat B exerts a force of 4000 newtons in the opposite direction. What is the combined force on the barge?
4.Draw arrows showing the individual and combined forces of the tugboats in #3.
5.Could there ever be a case when Tugboat A and Tugboat B are both exerting a force on the barge but the barge doesn't move? Draw arrows showing the individual and combined forces in such a situation.
Velocity: the rate of change of position. Force:what causes a mass to accelerate 7 types of force:strong, electromagnetic,weak, and gravitational
In this context "conserved" means the total kinetic energy of all the objects is the same after the collision as before the collision. Note, the TOTAL is the same but the individual kinetic energies of each object may be different before and after. When two or more objects are about to collide they have a certain total kinetic energy. It is common that during the collision some of the kinetic energy is transformed into heat. So after the collision the total kinetic energy is less then before the collision. This is a non-elastic collision. There are some collisions, however, in which none of the kinetic energy is changed to heat. These are called ELASTIC collisions. So the total kinetic energy doesn't change, or is "conserved". There is another possible non-elastic collision. If during the collision there is an explosion, then its possible for the objects to have a larger total kinetic energy after the collision as they aquire some of the explosive energy. Finally note, that in all collisions the TOTAL vector momentum is the same just before and just after the collision. So in a collision momentum is always conserved.
Do molecules in a liquid have the same kinetic energy as a gas?
No, molecules in a liquid have lower kinetic energy compared to a gas. In a liquid, the molecules are closer together and have weaker kinetic energy as they move more slowly. In contrast, molecules in a gas have higher kinetic energy because they are more spread out and move faster.
What is the result of friction?
A result of friction is heat. Anytime friction occurs between two pieces of matter, some sort of heat is cretated. Rub your hands together with force, and you will notice that they become warm. This is because the kinetic energy of the moving mass is not lost when the object slows down due to friction. Instead, it is converted to heat.
Another result can be the creation of a charge of static electricity. For example rubbing a glass rod with a silk cloth will do this.
Where did the rotational kinetic energy of the Earth come from?
The solar system formed from a massive cloud of gas and dust, which was slowly rotating. As the cloud collapsed under its own gravitational pull, the cloud started to spin faster, just as an ice skater pulling his arms in will spin faster. Because all of the material that accreted to form the planet was rotating, the planet was rotating as well.
To describe velocity you need to know?
Speed is a function of distance and time. For example we refer to 'miles per hour' or 'kilometres per hour' or 'feet per second'' or metres per minute' etc.
To determine speed, you need to know the distance travelled and the time it took to travel that distance.
How far will a brick fall from rest in 2.5 seconds?
The distance a brick falls can be calculated using the equation for free fall: d = (1/2)gt^2, where g is the acceleration due to gravity (9.8 m/s^2) and t is the time (2.5 seconds). Plugging in the values, we get d = (1/2)(9.8)(2.5)^2 = 30.625 meters. Therefore, the brick will fall approximately 30.625 meters in 2.5 seconds.
Friction is needed in various situations, such as for walking and driving to prevent slipping, and for stopping or slowing down moving objects. It also plays a crucial role in machinery and equipment to ensure proper function and efficiency. In general, friction is essential for tasks that require traction, control, or resistance to motion.
What is the top speed for a 1996 impala ss with the LT4 conversion?
I have one and most of the folks on the Impala SS forum believe the speed to be 145. I've personally had mine to 144 and that was all of it. I have a few mods on mine as well. I hope this helps I had an 94' caprice LT-1 w/tow pack , Took off the top speed limiter in the pcm''STOCK'' w/catback exhaust .Went 145mph and was still going! Don't think it would do 150mph. But could hit 147-148mph if I stayed on it . I think any good running94-96 SS can run over 140+mph
What is an example of constant speed with changing velocity?
Velocity is a vector, thus it has a direction. Therefore, you can change the velocity by changing direction. A great example of this is a ball on a string spinning at a constant speed, but it is continually changing direction, therefore, even though the speed is constant the velocity changes at every instant.
The total kinetic energy of all the particles in a substance is called?
The total kinetic energy of all the particles in a substance is called thermal energy. Thermal energy is measured in joules.
How can a person regain energy after becoming dehydrated?
It's best to drink plenty of water or sports drink and rest for a couple hours in a cool place. If you're dehydrated from sweating then you've lost electrolytes, so drinking some GatorAid or some other sports drink will help replace them.
AnswerThe first thing a person should do after becoming dehydrated is to consult a physician who will then decide on the best way to replace the fluids that the dehydrated person's body has lost.
AnswerI disagree. If you are still well enough to find and consult a doctor, then the doctor will just recommend what I said originally. Going to a doctor would only waste your money, and would cause more damage to your body since you aren't replacing the fluids right away.What is the kinetic energy of the moving particles in a substance or object?
Thermal Energy. Heat in the substance is measured by temperature. The movement causes it to give off heat.
Ex. The TV is on too long. You touch it. It feels warm.
The electric energy inside is giving off thermal energy. It's giving off heat.
Is momentum conserved in inelastic collision?
The energy of the momentum in a collision is conserved through the following occurrences; movement of vehicle(s) after impact, deformation of the vehicle(s) or objects hit, heat and sound.
Can a body have acceleration without velocity?
Yes, a body can have acceleration without velocity. This can occur if the body is changing its direction or speed while its velocity is zero at a particular moment. For example, a car at rest that suddenly accelerates forward experiences acceleration without velocity initially.
