At the crest (antinode), constructive interference takes place. 82. ANS: Sound is produced by the vibration of an object. The vibrating object collides with nearby molecules transferring energy to them. These molecules collide with other molecules transferring the sound through the medium.
Potential Energy - Is the energy stored in an object due to its position in a force field or in a system due to its configuration. 4. Kinetic Energy - An object is the energy that it possesses due to its motion. 5. Friction - Is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.
2. "F = ma: the net force on an object is equal to the mass of the object multiplied by its acceleration." 3. "To every action there is an equal and opposite reaction." To prove the 1st law, you can see that the air released from the balloon disturbs the state of rest of the car and makes it move.
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.
Drops of Liquid on a Penny Introduction: This experiment demonstrates the intermolecular forces between molecules of a substance. These forces are responsible for the observed surface tension in liquids. Surface tension is the phenomenon where strong forces between molecules cause the surface of a liquid to contract. Intermolecular forces result from the types of atoms bonded together in the compound and the shape of the molecule. When two different atoms are bonded together, each attracts the electrons differently like a tug-of-war between two unequal teams, producing a dipole.
Certain biological tissues preferentially absorb distinct wavelength values of electromagnetic (EM) radiation than others. This is what drives the formation of contrast in PAT. When an EM pulse is used to irradiate the tissues, absorption of the EM energy generates heat and the subsequent expansion of the absorbing tissue. This expansion causes the emission of acoustic waves (2). The acoustic waves generated from the absorbing tissue reach the detectors in the transducer array at different times.
Jet engines move the airplane forward with a great force that is produced by a thrust and causes the plane to fly very fast. A jet engine operates on the application of Sir Isaac Newton's third law of physics which states that for every action there is an equal and opposite reaction and propulsion. Propulsion means to push forward or drive an object forward. A propulsion system is a machine that produces thrust to push an object forward. Thrust generated depends on the mass flow through the engine and the exit velocity of the gas This law is demonstrated in simple terms by releasing an inflated balloon and watching the escaping air propel the balloon in the opposite direction.
6. Traction- a action of pulling things over a surface. 7. Centrifugal Force- is a force that acts outward on a body moving around on center, arising from the body's inertia 8. Centripetal Force- a force that acts on a body moving in a circular path and is directed toward center around which the body is moving.
Mass movements can be caused by increases in shear stress, such as loading, lateral pressure, and transient forces. Alternatively, shear strength may be decreased by weathering, changes in pore water pressure, and organic material. This paper presents a review of different parameters of slope’s stability under blasting-induced vibration. Similarity of blasting vibrations to earthquake motions has produced a predictable transfer of analytical techniques from earthquake engineering. This transfer allows quantifying the influence of blasting waves on the rock mass of the slope and on soil slopes.
Also this lab teaches about measurement uncertainty can be calculated using the percent error equation. These are the purposes of the lab. My hypothesis of this experiment is that the velocity of an object, the ball rolling down a ramp or falling down, changes at a constant rate, thus uniform acceleration occurs. Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity over time. An object accelerates if its velocity is constantly changing, also known as speeding up or slowing down.