Longitudinal wave The vibrations of the object set particles in the surrounding medium in vibrational motion, thus transporting energy through the medium. For a sound wave traveling through air, the vibrations of the particles are best described as longitudinal. Longitudinal waves are waves in which the motion of the individual particles of the medium is in a direction that is parallel to the direction of energy transport. Sound waves in air (and any fluid medium) are longitudinal waves because particles of the medium through which the sound is transported vibrate parallel to the direction that the sound wave moves. As the vibrating string moves in the forward direction, it begins to push upon surrounding air molecules, moving them to the right towards their nearest neighbor.
The air rises, then spreads horizontally to the north and south. Eventually the now cool air sinks and flows along the surface to replace the rising air at the equator, forming a circulation cell or a Hadley cell. It tends to sink at about 30° north and 30° south latitude. As the air sinks it warms and dries. Not only can sinking air not produce rain, but when it reaches the ground it absorbs water from the soil and vegetation, creating even more arid conditions.
The cold water is brought when the surface current flows westward in a process known as upwelling. Now, the trade winds for El Nino are weakened causing a reduction in the westward flow and upwelling is reduced. Rainfall follows the warm water to the east. The rainfall causes flooding in Peru and droughts in Australia and Indonesia. So, now in North America El Nino causes the hurricane season to diminish and the tornado season to be active.
Terminal Velocity and the Effects of Viscosity Introduction: (Purpose, Background Information and Research Questions) The main purpose of this investigation is to find out how terminal velocity is affected by the viscosity of a variety of liquids. Some questions I had to ask myself was not just how viscosity would affect terminal velocity, but also what other factors can act on terminal velocity to create a change. These questions were: * Does the mass of the object affect terminal velocity? * Does the shape or the aerodynamics of the object affect terminal velocity? * Does the drag applied affect the terminal velocity of the object?
Due to the increase in greenhouse gases less solar energy is reflected back into space and more solar radiation is absorbed by the Earth causing the increase in ice and snow melting (Main & Ahlenius, 2011). With this background information the change of climate conditions such as, snow, rain, winds, and temperature is continuously happening all around the world and will continue to worsen in the future. A good indication of climate change is to look at the melting of glaciers and the Polar Regions as the Arctic is one of the fastest warming regions of the world. However, since the Polar Regions are so big and cold it would be impracticable for humans to live and carry out research there. Therefore, by using applications of remote sensing we can easily observe inaccessible areas from satellites to effectively monitor and map snow and ice cover in Polar
The position of two wings should be relative to each other as if they were very close then the resultant force will be in opposite direction and thus cancel each other. Two wings produce more down force as the lift coefficient increases and the drag decreases. Table 1. Calculated value of Air Resistance Determination of Air Resistance Air resistance is the resistance offered by air to the movement of a vehicle. The air resistance has an influence on the performance, ride and stability of the vehicle and depends upon the size and shape of the body of the vehicle, its speed and the wind velocity.
When the sun and moon are at a right angle, the pulls fight each other and cause a smaller difference between high and low tides called neap tides. Another type of motion is waves. Everything in the water causes waves, but the most common thing is wind. When wind passes over the surface of the water, friction causes it to ripple. The strength, distance, and length of the wind gusts determine how big the ripples become.
Together these things work to create ocean currents that help in the overall vitality on our earth dynamic surface. Wind is one of the largest indicators for ocean currents. It works by circulating differential heating around the world helped by our equators warm belt, our poles cold points, and the Corialis effect. The Corioles effect is the deflection of moving objects when they are viewed in a rotating reference frame. Our rotating reference frame is the earth, and its large mass and slow rotations the force is quite small.
Rising air currents take water, as vapor, up into the atmosphere; with the water form of "evapotranspiration," which is water transpired or from plants and that has evaporated from the soil. The cooler temperatures in the atmosphere cause it to condense in the clouds, which float around in the air until they fall from the sky as precipitation. Some precipitation falls as snow and can accumulate as hail, where it can stay, as ice crystals, for thousands of years. In warmer climates, snow melts, then warmer spring and summer months, and that water flows into streams and rivers, which eventually return it to the ocean, or into the groundwater, which eventually reach underground purifiers. Over time, the water continues to flow, some to return to the ocean, where the water cycle renews itself.
The amount of air pressure depends on how often these particles collide. For a balloon to fly, the air pressure needs to be high, at least as high as the outside air pressure otherwise it would crush it. There are a few ways to increase air pressure including adding more gas particles to increase the frequency of collisions or raising the temperature of the air to speed up the particles which in turn would result in more collisions and greater air pressure. Since it is important that the air is heated up, it also helps if the outside air is cooler so that there does not have to be as many gas particles to create the same high air pressure. Overall, buoyancy and air pressure