So you see, Newton's 3rd law can explain your balloon powered car. air shoots out the back at high speed and the car moves forwards (more or less) at low speed. So the force used to accelerate all that air backwards has an opposite force on the balloon (reaction) which is tied to the car so pushes in the opposite direction. Well the air's coming out fast in the beginning but thats when the car is only just moving, it takes a while to speed up and it takes even longer if you have a heavy car. So you may be able to argue it shows that f is proportional to Mass x acceleration (but to be honest I think that would be stronging it a bit - balloons don't seem to give very constant thrust.
Be sure to address the concepts of center of pressure and aerodynamic center, as well as any pitching moments occurring on the airfoils Lift is the force that directly opposes the weight of the airplane. The first theorem addressing lift is Bernoulli’s principle. The airfoil travels through the air the shape of the airfoil creates a lower pressure above the wing and a higher pressure below the wing. This pressure differential causes the airfoil to be pushed upward and lift is a result. The second theorem is simply Newton’s third law where air is forced downward so there is a reaction of the airfoil being pushed upward (lift).
As the jets of gas shoot backward, the engine and the aircraft are thrust forward. These gases exert equal force in all directions, providing forward thrust as they escape to the rear. Engine thrust may be increased by the addition of an afterburner section in which extra fuel is sprayed into the exhausting gases.In a turboprop engine, the exhaust gases are also used to rotate a propeller attached to the turbine shaft for increased fuel economy at lower altitudes. For typical jet engines overall efficiency ranges from 20 to 40%. A very tiny fraction of a percent goes to generate noise.
Diffusion is where particles move from where they are in an area of high concentration to where they are in an area of low concentration. Ficks law of diffusion states that: . This shows that the greater the surface area of the diffusion surface the greater the rate of diffusion will be. This is because there is a greater are for the particles to diffuse across if the is a concentration gradient. A good example of where a large surface area is used for a fast rate of diffusion is in the alveoli of the lungs.
The energy in the radiator is transferred to the air. Explain the factors that affect the rate of energy transfer in the engine and radiator. • The rate of energy transfer depends on the temperature difference between the system and the surroundings • Bigger the temperature differences between the radiator and the air, faster the rate of energy transfer. • Radiator contains water which has a very high specific heat capacity. So it can absorb a large amount of heat from the engine • Both the radiator and engines are made of metal which makes both of them good conductors of heat.
There would be a slower rate of combustion which leads to inefficient burning and less heat would be produced in the process. For very high precision work, discuss the major corrections that have to be applied to the calorimeter procedure and included in the calculation of the calorific value. For higher precision, the bomb should be evacuated so as to ensure that there is vacuum in the bomb prior to pumping in pressurised oxygen. This is to ensure that there would be pure oxygen in the bomb, thereby increasing the efficiency. Moreover, as heat would be absorbed by the bomb calorimeter during
FOR A MOMENT, THINK OF AN AIRPLANE MOVING FROM LEFT TO RIGHT AND THE FLOW OF AIR MOVING FROM RIGHT TO LEFT. THE WEIGHT OR FORCE DUE TO GRAVITY PULLS DOWN ON THE PLANE OPPOSING THE LIFT CREATED BY AIR FLOWING OVER THE WING. THRUST IS GENERATED BY THE PROPELLER AND OPPOSES DRAG CAUSED BY AIR RESISTANCE TO THE AIRPLANE. DURING TAKE OFF, THRUST MUST BE GREATER THAN DRAG AND LIFT MUST BE GREATER THAN WEIGHT SO THAT THE AIRPLANE CAN BECOME AIRBORNE. FOR LANDING THRUST MUST BE LESS THAN DRAG, AND LIFT MUST BE LESS THAN WEIGHT.
The molecules of gas have a comparatively large space between them. Conduction occurs only in solids which have closely packed molecules whose motion is restricted to vibration in the same position within the solid mass. The addition of heat energy, due to this compactness, is translated to Kinetic Energy (greater vibrational motion) which is immediately transferred to neighbouring molecules and the Heat Transfer by Conduction is Achieved. Conduction is the fastest form of Heat transfer. Convection, heat transfer in fluids (Liquids and Gases) is due to rising currents of fluid due to decrease in Density.
With too many greenhouse gasses in the air, the earth’s atmosphere traps too much heat and light and eventually the earth get too hot and the temperature rises. This process of collective heat from the sun is called the greenhouse effect. Sometimes the temperature can change in a way that helps us. The greenhouse effect makes the earth appropriate for people to live on it. Without it, the earth would be freezing, or the earth would be extremely hot.
1. Temperature: As the inlet air temperature increases the drying rate also increases and vice versa. This approach to increase the drying rate can not be used always because some materials are sensitive to high temperature, e.g. Ibuprofen get liquefy above 60°C temperature of inlet air should be optimized without harming product quality. If temperature is higher, it leads to blistering.