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Physics

What does apparent movement of a star used to measure its distance from Earth

Eric Morgan

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Which of the following would be considered basic science questions? A. How can cars be made safer? B. What is the best way to improve a gas engine? C. Why do many birds have colorful feathers? D. What are the stages in the life cycle of a star?

Rodney Fox

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A tariff is another name for

Timothy Norman

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Which statements about acceleration are true? check all that apply. a. the si units of acceleration are m/s2. b. for acceleration, you must have a number, a unit, and a direction. c. to calculate acceleration, divide the change in speed by the change in time. d. the symbol for acceleration is .

Tara Andrews

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Which best describes the first law of thermodynamics as compared to the second law of thermodynamics?

Jessie Thompson

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Which would cause the greatest increase in the acceleration of a satellite?a decrease in the radius and the tangential speedan increase in the radius and the tangential speeda decrease in the radius and an increase in the tangential speedan increase in the radius and a decrease in the tangential speed

Ronald Miller

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Photons travel outward from a light bulb in

Eric Morgan

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When light hits the boundary between two different materials, it can undergo when light hits the boundary between two different materials, it can undergo both reflection and refraction. refraction. reflection?

Ross Pratt

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Determined by the distance between objects and the difference in mass between the objects

Curtis Rhodes

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The area of a circular trampoline is 108.94 square feet. What is the radius of the trampoline? Round to the nearest hundredth. A. 10.44 feet B. 5.89 feet C. 34.68 feet D. 3.32 feet

Caroline Campbell

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Which liquid is the most viscous? syrup water milk apple juice

Kathy Robinson

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When electromagnetic fields interact with charged particles, they become stronger because they gain protons. they become weaker because they gain electrons. electromagnetic force will occur. electromagnetic forces are canceled.

James Washington

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What lever has resistance between the axis (fulcrum) and the force (effort)? a. first b. second c. third d. fourth

Kaitlin Dean

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An endothermic reaction is one that uses which form of energy?Nuclear FusionElectrical EnergyChemical EngerySound Energy

Jeremy Wood

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If the temperature of a substance increases, what can you conclude about the value of q? A. It must be less than 1. B. It must be negative. C. It must be positive. D. It must be greater than 1. Please help! I need to answer this question right to pass!

Megan Page

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Niobium has a density of 8.57 g/cm3 and crystallizes with the body-centered cubic unit cell. Calculate the radius of a niobium atom.

Caroline Campbell

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The uterus gets ready to nurture a fertilized egg by

Samantha Barber

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Hoover believed that the private sector would pull the United States out of the Depression. true false

Whitney Matthews

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Figure 1 shows a wave movement during one second. What is the frequency of the wave A)2 hertz B)2 meters/second C)0.5 second D)1 hertz Download png

Jeremy Wood

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One major cause of floods is A. rapid spring snowmelt. B. light rain over a large area. C. a decrease in stream discharge. D. increased capacity of stream channels.

Timothy Norman

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Calculate the frequency of each wavelength of electromagnetic radiation:12.24 cm (wavelength of microwave oven)

Theresa Perry

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What is the wavelength of a 100-mhz ("fm 100") radio signal?

Ashley Howard

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Why is it difficult to test the efficacy of biofeedback using experimental techniques? A. It is difficult to devise a control treatment that replicates biofeedback. B. Biofeedback cannot be subjected to testing because it is pseudoscience. C. The principles of biofeedback are not entirely understood. D. Biofeedback is not concerned with any scientific subject

Melissa Norris

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What is the speed of a wave with a frequency of 2 Hz and a wavelength of 87 m? 0.023 m/s

Alexa Spicer

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Without the force of friction, people would not be able to walk. please select the best answer from the choices provided. t f

Ralph Lopez

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The wavelength of some green light is 530.0 nm. what is the frequency of this green light?

Jeffrey Rodriguez

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An fm radio station broadcasts at a frequency of 101.3 mhz. what is the wavelength?

Whitney Matthews

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Which of the following best describes a plane? A. A curve in a road B. The surface of a flat table C. The edge of a desk D. The point of intersection of two walls

Jessie Thompson

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Which of the following is the best reason to rest muscle groups between workouts? a. it allows the muscle to store energy b. it allows you to focus on other muscle groups c. it allows the muscles to heal d. it allows the muscles to properly overload

Karen Wright

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What is Freud's term for the primitive, biological side of personality?

Zach Chandler

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Which reaction would produce a solution that conducts electricity extremely well? Please help Download png

Dana Keller

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Gasoline and propane fumes are most likely to accumulate in what part of the boat

Bethany Evans

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The three leading causes of fatal collisions are

Mindee Nelson

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When nuclear fission occurs some mass is lost where does that mass go

Blair Lewis

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A process that modifies light waves so they vibrate in a single plane is referred to as

Roger Moore

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Which of the following instruments is used to measure air pressure

Brandon Scott

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Where did Barbara make an error in placement of a nutrient?

Ronald Miller

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To what is amplitude related? (1 pointthe amount of energy carried by the wave the maximum displacement from the rest position neither of the above both the first and the second choices above amplitude is related to both the amount of energy carried by the wave and the maximum displacement from the rest position . [ ] [ [ ] ]

Kathy Robinson

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Surface winds on Earth are primarily caused by differences in A) Air density due to unequal heating of Earth's surface. B) Distances from the Sun during the year. C) Rotational speeds of Earth's surface at various latitudes. D) Ocean wave heights during the tidal cycle. Explain pls

James Washington

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Communities of organisms coexist in organized, balanced _____? A-ranges B-territories C-ecosystems D-populations

Jodi Brooks

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Which statement describes a major drawback of the Bohr model that caused scientists to replace it? A) It worked only for helium and larger atoms. B) It did not identify the distance between an electron and the nucleus. C) It contradicted the Heisenberg uncertainty principle. D) It stated that spectral lines of atoms are similar.

Jeffrey Rodriguez

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The position of a 2.75×105n training helicopter under test is given by r⃗ =(0.020m/s3)t3i^+(2.2m/s)tj^−(0.060m/s2)t2k^. part a find the net force on the helicopter at t=5.0s.

Justin Parker

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An electron is located in an electric field of magnitude 600. newtons per coulomb. what is the magnitude of the electrostatic force acting on the electron?

Timothy Norman

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A kayaker needs to paddle north across a 100-m-wide harbor. the tide is going out, creating a tidal current that flows to the east at 2.0 m/s.the kayaker can paddle with a speed of 3.0 m/s. a. in which direction should he paddle in order to travel straight across the harbor? b. how long will it take him to cross?

Samantha Barber

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Which of the following reactions involves the transfer of electrons? a. synthesis c. combustion b. decomposition d. reduction-oxidation

Donald Ward

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What is the atomic number z of 73li?

Dana Keller

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Calculate the displacement of the volleyball in sample problem 2f when teh volleyballs final velocity is 1.1 m/s upward

Melissa Norris

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What is the length of an aluminum rod at 65°C if its length at 15°C is 1.2 meters?

Heather Maxwell

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