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what are the two general types of energy that can be used to classify many fourms of energy? Kinetic energy and potential energy what is the most familiar form of electromagnetic energy? Visible light What evidence is there that energy is transferred as a golf club does work only golf ball? The kinetic energy of the golf ball suddenly increases as the club strikes it In what two ways can you increase the elastic potential energy of the spring? Stretch it or compress it Sled a with its riders has twice the mass of sled be with its riders if both sleds have the same kinetic energy which sled is moving faster. explain your answer? Lead B, it has less mass. Why can you model the thermal energy of an object as the mechanical energy of the particles that make it up? Because the thermal energy of an object is a kinetic and potential energy of its particles Describe one energy conversion that takes his place in a hydroelectric powerplant> The potential energy of stormwater is converted into kinetic energy as the wire moves the turbine blades( KE) What energy conservation takes place as an arrow is shot from a bow? The elastic potential energy of the bent bow and string is converted into kinetic energy of the arrow Identified two different types of nuclear reactions in which the equation E equals MC squared applies. Fission and fusion Explain how biomass energy depends on the sun. Biomass energy is the chemical energy stored in living things. The chemical energy is produced as plants converted sunlight in the form of electromagnetic energy and chemical energy. Why is a mechanical wave not always produced when the surface vibrates? The vibration has to carry energy through the medium What type of mechanical wave is produced by pushing sharply on the end of a Spring toy? A longitudinal wave When you shake that into the road to make a way, how can you increase the amplitude of the wave? Shake the rope with more force Consider the properties of away wave speed, amplitude, Whapley,., And frequency. Which two properties could you determine the numerical values of by using only the information given in figure 17 - one? Period And frequency How can you change the wavelength of a way in a row without changing the amplitude? Shake the rope faster or slower while using the same force as before How can you compare the energy carried in two different longitudinal waves. The wave with greater compression has more energy Consider a wave approaching a barrier with a small hole. What change is the wave likely to undergo as it encounters the barrier? The wave will bend or diffract Describe how a wave must in a new medium in order for refraction to occur. The wave must enter the new medium at an angle Waves X and y are passing through a whole. Wave X has a really really large wavelength compared to the hole. Wave y has a relatively small wavelength. Which wave will diffract more as it passes through the whole? Wave X Suppose to waves meet temporarily and cancel each other out. How would you describe the interference? It is distractive, troughs of one wave meet crest of the other wave What sounds can damage hearing? Sounds greater than 90 decibels, such as a jet plane her rocket concert How did the frequencies of ultrasound compared to the frequencies that people normally here? Ultrasound frequencies are higher than the sounds that people normally hear. What is the droppler affect? As the source of a sound approaches, you hear a higher frequency, and has a source moves away from me, you hear a lower frequency.