Refraction occurs when waves change speed when changing media. Diffraction occurs when waves bend around a barrier. 81. ANS: At the node, destructive interference takes place. At the crest (antinode), constructive interference takes place.
A phrase of a waveform is the point where the wave is in its cycle. 2. What happens when two identical waves are in-phase? When two identical waves are in-phrase they build on one another, making higher amplitude. 3.
a. strain buildup only b. location of foci c. magnitude of P-waves [pic] d. reoccurrence rates of earthquakes in an area and the rate of strain buildup 2. What are most earthquakes associated with? a. rift valleys b. mid-ocean ridges c. divergent plate boundaries [pic] d. plate boundaries 3. At what point in the graph would a rock be permanently deformed? [pic] a. at the start of the stress [pic] b. past
He suggested that at the centre of oceans, molten material would rise from the Earth’s mantle, causing new sea floor to be created, pushing the ocean floor. He also suggested that there were ocean trenches where old sea floor would then go back into the mantle, and molten. He found that these ocean trenches, the deepest parts of the ocean, were very near continental plates. Hess theorized that the action of the sea floor spreading caused continents to move apart and so this being evidence for continental drift, showing why it happened. The evidence of sea floor spreading was further supported by Vine and Drummond, who studied the magnetic pattern of the sea floor.
The buoyancy force of the water pushing up on the block is Fbouyancy=PwaterAblock=ρwaterxgAblock=mdisplaced waterg. The weight of the water displaced by the block is equal to the buoyancy force upward on the block. Note, the volume of the water displaced by the bock is the volume of the block, which is under water. If not in motion, the buoyancy force upward on the block is balanced by the weight of the block. Using this information, we can calculate the amount of the block that should be underwater using the following, mblackg=Fbouyancy=mdisplaced waterg therefore, ρblockVblock=ρwaterVdisplaced water →ρblockh=ρwaterx.
* b) Know and understand that waves may be either transverse or longitudinal. * You need to understand that in a transverse wave the oscillations are perpendicular to the direction of energy transfer, but in a longitudinal wave the oscillations are parallel to the direction of energy transfer ie direction of forward wave movement. * Shaking a slinky spring from side to side produces a transverse wave, as ripples on water. * Pulling and pushing on a
Depending on the type of salt, this reaction can either release or absorb heat energy. When a reaction occurs that releases heat, it is referred to as an exothermic reaction (the prefix exo is Latin for “out of”).
Andrew Knapp Unit 7 Assignment 1. Refraction, Reflection, and Optics NT1310 2/18/2015 Refraction occurs when there is a change in direction of propagation of a wave due to a change in its transmission medium. Basically this is when light is bent due to the light waves passing through a substance such as water or glass. When this happens the light particles slow down or are absorbed into the material. A real life example of refraction would be when a pencil is placed halfway in a glass of water.
Convection is another method of heat transfer. This occurs when heat is transported through a large movement of heated molecules. The temperature of a liquid is relative to its density and this is when convection occurs. Cooler rocks higher in the mantle are denser than the hotter rocks below them and this is where gravity forces the colder rocks down, as they are heavier. Convection dominates the thermal conditions in the areas where large amounts of fluids, mostly being molten rocks, exist, and therefore it controls the transport of heat from the mantle and the fluid outer core.
I am going to find out whether the wave height and wave frequency determines the type of wave. There are two different types of waves and they are constructive waves and destructive waves. Constructive waves have a stronger swash and have a weaker backwash. Constructive waves deposits sediments and it forms the beach. Destructive waves have a stronger backwash and have a weaker swash.