Mechanics

-- speeding up, by flooring the gas-pedal

-- slowing down, by touching the brake

-- curving, by turning the steering wheel, but maintaining the same speed

One mole of photons would contain approximately 6.022 x 10^23 photons. This number is known as Avogadro's number and represents the number of particles in one mole of any substance. Each photon carries energy and has characteristics of both particles and waves.

The buoyant force of air would be greatest for a hot air balloon because it relies on the principle of buoyancy to stay aloft. The heated air inside the balloon is less dense than the surrounding air, creating a greater buoyant force to lift the balloon. A bird and an airplane rely on aerodynamic lift generated by their wings to stay airborne, rather than buoyancy.

They're equivalent. 1 J is equal to 1 Newton*1 meter (N*m), and a Newton is equal to a kilogram times a meter per second squared (kg m/s2). Therefore, substituting kg m/s2 for the Newton, and multiplying it by a meter, a Joule is a kg m2/s2. If it's Joules per kg, then it's (kg m2/s2)/kg, and the kg unit on the top and the bottom cancel each other out. You're left with m2/s2!

If the high frequency sound is within hearing range, you can hear it as a high-pitched sound. If it's out of the hearing range you can't hear it, of course.

Unbalanced forces are forces that do not cancel each other out, resulting in a net force that causes an object to accelerate in the direction of the greater force. This can lead to a change in the object's speed, direction, or both.

Scientific research, measuring and experiments are carried out in a controlled environment called a laboratory or lab for short. Chances are that we've all been inside a lab at least once in our lives. Either for education or as a hobby, I think you'll agree that chemistry is truly an interesting branch of science.

With cooking, a chef needs various knives, pans and other tools to cook his "Piece de resistance". Painters need different brushes and paints to create their masterpieces. This is also the same for scientists at laboratories. Laboratory apparatus are different tools and equipment used by scientists to perform their tasks.

The basic types of laboratory apparatus are the glassware, the stands, burners and evaporation equipment. Depending on the experiments and research done in a lab, there could be more equipment. Laboratory apparatus like the beaker, test tubes and flasks fall under glassware lab equipment. These are often used for containing, measuring and observing of liquid chemicals or compounds used in an experiment.

The specific ones that can be used for storing are test tubes with corks or stoppers and glass reagent bottles. Others like the graduated cylinder, graduated beakers and flasks are used to measure liquids. If a liquid needs to be transferred from one vessel to another, the graduated glass pipette, graduated cylinder or a graduated glass dropper can be used depending on the amount of liquid.

Other laboratory apparatus falling under the category of glassware can be used like pans over a lab burner. The evaporating dish for example is a circular piece of glass, sort of like a giant clear contact lens used to evaporate chemicals. A similar looking laboratory apparatus is the Petri dish, often used by biologists to culture cells. The flat-bottomed Erlenmeyer flask was also designed for heating liquids over a burner. The gradual narrowing of the neck is designed to keep more heat from the burner.

Stands and clamps are tools used to hold and stabilize other laboratory apparatus. Examples are the test tube rack, test tube holder and the tripod. A stand and clamp is often used with a flask glass bottom or a test tube. Because the bases of these are curved, the stand and clamp is used to achieve a stable upright position. The tripod is often used with a burner under it.

Bunsen burners are heating devises that function as little stoves in the lab. These are used to provide concentrated heat to evaporate or heat certain liquid solid chemicals. Bunsen burners are fueled by gas often supplied by a gas line installed inside the lab. Modern electronic hot plates can also be used for heating. Some electronic hot plates have curved bases that mold with the shape of a round bottom flask. This not only reduces the risk for spillage, it also rids scientists of gas leak worries.

These are only some of the myriads of laboratory apparatus used in by scientists today. The various fields of science are wide and complex. Knowing the basic laboratory apparatus and their uses is just the tip of the iceberg.

acceleration according to Newton's second law of motion, F=ma. The object will accelerate in the direction of the net force applied.

Relative Humidity can be measured with a psychrometer. A psychrometer has two thermometers, a wet-bulb and dry-bulb. The wet-bulb has a wet cloth on one end. If the wet-bulb is colder than the dry-bulb, than you apply the information to a psychrometer chart, which tells you the relative humidity, from which you can determine "high" or "low".

http://andrewslog.files.wordpress.com/2008/04/48d16354-752c-4965-9c43-024073c31186.jpg

We can reduce friction by oiling ("lubricating") the surfaces. This means that the surfaces no longer rub directly on each other, but slide past on a layer of oil. It's now much easier to move them.

Friction acts in the opposite direction to the motion of an object, so it reduces the net force acting on the object. This reduction in net force can impact the acceleration or deceleration of the object. The net force is the sum of all forces acting on an object, including friction.

Yes, but the net force is ZERO! If an object is moving at constant velocity, the sum of the forces acting upon it is zero. When an object is motionless, its constant velocity is zero. If at any time the sum of the forces -- sometimes called the net force -- is non-zero, the object will accelerate in the direction of the resultant force.

It actually determines the direction of movement that is going to be caused in it.Net forcealso determines that magnitude of which force is greater when a body is subjected to two or more forces in different directions.

Momentum refers to the quantity of motion an object has. It is calculated by multiplying an object's mass by its velocity. In physics, momentum is a vector quantity, meaning it has both magnitude and direction.

As a falling object accelerates through air, its speed increases and air resistance increases. While gravity pulls the object down, we find that air resistance is trying to limit the object's speed. Air resistance reduces the acceleration of a falling object. It would accelerate faster if it was falling in a vacuum.

sound waves are compression waves, or longitudinal waves. sounds that we hear are actually just compressions and rarefactions of air particles, meaning the air particles move closer together for a time period then spread apart farther then they normally would rarefaction)

Blood is a homogeneous mixture because it is the same everywhere in one's body. A homogeneous mixture is like a cup of coffee. In the cup, the sugar, creme, and coffee are evenly mixed. A heterogeneous mixture is like a bowl of Fruit Loops. The different colors of the cereal are not mixed with each other. Homogeneous mixtures are the same throughout, and heterogeneous mixtures are different throughout.

ACTUALLY THAT IS WRONG I JUST TOOK AN EXAM THE ANSWER IS HETEROGENEOUS MIXTURE BECAUSE ITS NOT EVENLY THROUGHOUT BUT HAS DIFFERENT COMPOSITIONS

The product of an object's mass and velocity is known as momentum. Momentum is defined as mass times velocity and is a vector quantity, meaning it has both magnitude and direction. It is often denoted by the symbol "p."

Mechanical equilibrium occurs when the forces acting on an object are balanced, resulting in no net force on the object. This means the object will remain at rest or move at a constant velocity. It can be achieved by balancing forces in various directions.

Because you are generally sitting down with your feet off the floor or ground when you are swinging your legs, and your legs just naturally bend at the knees when you are sitting down. It is impossible to swing your legs back and forth standing on your feet.

The coefficient of kinetic friction can be calculated using the formula: coefficient of kinetic friction = force of kinetic friction / normal force. The force of kinetic friction can be found using the formula: force of kinetic friction = coefficient of kinetic friction * normal force. Given the force of 31N and normal force equal to the weight of the crate (mg), you can calculate the coefficient of kinetic friction.

The coefficient of friction for talcum powder can vary depending on the surfaces it is in contact with. On average, talcum powder has a low coefficient of friction due to its fine, powdery texture. It is commonly used to reduce friction between surfaces.