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Which material is ideal for an office door that allows light to pass through, but maintains privacy? A. clear glass B. wood C. frosted glass D. metal

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What happens to light that shines on an object but is not transmitted? A. It is scattered or refracted. B. It is polarized or absorbed. C. It is reflected or refracted. D. It is reflected or absorbed.

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High frequency X-rays have _____ wavelengths compared to visible light. a) long b) very long c) average d) short

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A mirage is created when light is refracted _____. A. as it travels from air to water, making objects appear to break at the surface of the water B. as it travels from air to water, making underwater objects appear closer and larger C. through layers of hot air surrounding a surface, making objects at the surface appear to break D. through layers of hot air just above a surface, causing it to follow a curved path

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A material that can scatter light is considered _____. A. transparent B. translucent C. opaque

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Is it possibly to make special swords made out of light that can cute through anything like in the movie star wars?

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People working in nuclear plants wear special monitoring devices to track their exposure to radiation. Radioactive materials used in plants emit particles but they also emit high energy waves that are potentially lethal to human life. These waves are ______ waves.

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Please choose the answer that describes the scientific notation for 5,098,000. A. 5.098 × 108 B. 5.098 × 107 C. 5.098 × 7577 D. 5.098 × 106

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A ray of light passes from air into water with an angle of incidence of 30 o. Which of the following quantities does not change as the light enters the water. . a) Wavelength b) frequency c) speed of propagation d) direction of propagation.

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Calculate the energy of the orange light emitted, per photon, by a neon sign with a frequency of 4.89 × 1014 hz.

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Lenses are described as convergent or divergent depending on how they refract light. what is the difference between these two types of lenses? based on what you have learned, do you think the cornea and the eye lens act together as a convergent or divergent lens? explain.

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Will Upvote!! In which situation is the object experiencing unbalanced forces? A) A box resting on a horizontal floor. B) A car slowing as it reaches a traffic light. C) A car with its cruise control set to 30 km/h. D) A penny at terminal velocity after falling off of a building.

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A car is traveling at a constant velocity of 60 km/h for 4 hours. Choose the correct statement about the acceleration of the car. A) The acceleration of this car is zero. B) The acceleration of this car is positive. C) The acceleration of this car is negative. D) The acceleration of this car is 15 m/s

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What colors of light are reflected by the color magenta?

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Molecules of two solid substances actually collide with each other to transfer energy in this method of heat transfer. A) conduction B) convection C) insulation D) radiation 14) By now, you know that sound is produced by vibrations. These vibrations can travel through solids, liquids, and gases, but not through ______________. A) empty space B) granite rock C) living objects D) the center of the earth 15) Sound waves are mechanical waves in which the particles in the medium vibrate in a direction parallel to the direction of energy transport. Identify another name for this type of wave motion. A) transverse waves B) pressure waves C) longitudinal waves D) electromagnetic waves 16) Which type of energy transformation does NOT describe potential energy being changed into kinetic energy? A) Compressing a spring. B) A ball falling off a shelf. C) A bike coasting down a hill. D) Releasing a stretched rubber band. 17) An ice cube is placed into your hand. Over time, the ice cube begins to melt. Why does the ice cube melt? A) The ice cube is losing energy (heat) to your hand. B) Your hand is gaining energy (heat) from the ice cube. C) The ice cube is gaining energy (heat) from your hand. D) A chemical reaction occurs from your sweat that makes the ice cube melt. 18) Which object below involves two energy transformations when used? A) A radio plugged into an electrical outlet. B) A toaster C) A battery-operated remote control car D) A blender 19) speed of sound Material speed of sound in m/s air 331 helium 972 tap water 1493 sea water 1533 aluminum 5100 Based on the table and your knowledge of sound, what might be the best explanation of why sound travels faster in saltwater than fresh water? A) Less dense objects allow sound to travel faster. B) Saltwater has two compounds and fresh water only one. C) Closer packed or more dense media will have higher speed of sound. D) Saltwater has both solid and liquid, so it will be the average of the components. 20) What do we call the distance labeled from A to B and what could we do to the note played on an instrument to change that distance? A) From A to B is known as the wavelength and changing the pitch of the note will change its length. B) From A to B is known as the amplitude and changing the loudness of the note will change its length. C) From A to B is known as the wavelength and changing the amplitude of the note will change its length. D) From A to B is known as the wave height and changing the amplitude of the note will change its length.

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Does the temperature of a material always increase as it is heated? Explain briefly.

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A negatively charged rod is placed near two neutral metal spheres, as shown below. Which statements describe the charging method shown? Check all that apply. The spheres develop opposite charges. The spheres develop the same charge. Electrons move from the rod to Sphere A. Electrons move from Sphere A to Sphere B. The spheres are charged through conduction. The spheres are charged through friction. The spheres are charged through induction.

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Which of the following statements describes a compound machine? A. It has movement in only one direction. B. It can only be acted on by one force. C. It is made up of more than one simple machine. D. It makes work more difficult.

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Can you differentiate between the wavelength of visible light and the wavelength of a moving soccer ball

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Which is not a primary color of light? a) green b) blue c) yellow d) red

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What term describes thermal energy that is not converted into work by a heat engine? A. radiation B. transferred heat C. waste heat

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Identify the person who made the correct statement. Juan said fossils deposits always contain only one type of organism. Christina said fossils deposits never contain one type of organism. A. Juan is correct. B. Christina is correct. C. Neither Juan nor Christina are correct. D. Both Juan and Christina are correct.

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Indicate whether the statement is true or false. an astronaut weighs the same on earth as in space. a. true b. false

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Which of the following statements about planetary satellites is true? all planetary satellites are as large as our moon or bigger. all planetary satellites are relatively small, typically having a radius of no more than 20 kilometers. planetary satellites vary greatly in size, but none are larger than any of the planets in the solar system. planetary satellites vary greatly in size, from very small, to some that are larger than some planets.

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Mixtures occur when two or more materials are combined and each material keeps its own properties. All of the following are mixtures EXCEPT A) Salad B) Pizza C) Water D) Chocolate milk

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What are the top three materials by weight in a computer

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The _______ the object, the _______ effect a force will have on its motion. A. softer; less B. harder; less C. lighter; less D. heavier; less

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What physical properties of nylon and leather make them good materials to use for shoelaces? A. high density and low conductivity B. durability and flexibility C. hardness and durability D. low viscosity and flexibility

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An experiment measures the breaking point of identical strips of wood made from different trees. The procedure must contain which of the following instructions? A. performing the experiment outside B. disposing of the broken wood strips C. cleaning up the scattered pieces of wood D. performing the experiment in a safe manner

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Which is not a property of displacement?A= it includes a directionB= it is a scalar measurement C= the units can be in meters D= it describes the change in position of an abject from one point in time to another

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