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Physics

What is a heat pump? Why does it need to put in external work? Help ASAP!

Kaitlin Dean

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The atmosphere is unaffected by changes in the geosphere.

Eric Morgan

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What is the porosity of the sand sample?(The sediment volume for each sample is 400ml.) a. 90.25% b. 72.00% c. 25.50% d. 16.75%

Ashley Howard

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Which is a challenge that is most likely unique to urban areas? a. power outages b. shortage of water c. population density d. lack of personal time?

Cynthia Baker

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Which property describes an electromagnetic wave and not a mechanical wave? a. transfers energy b. travels in a vacuum c. has frequency d. requires a medium

Curtis Rhodes

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Water at the top of a slope has potential energy. true or false

Chelsea Hayes

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Compared to the tropical rainforests, the temperate rainforests generally have __________.

Roger Moore

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Where are iron and aluminum often found?

Jeffrey Rodriguez

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In an ecosystem , energy that flows to tertiary consumers ultimately originates from the sun? true or false

Kristi Hammond

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What would the potential of a standard hydrogen electrode (s.h.e.) be under the given conditions? [h+]=0.46 mph2=1.9 atmt=298 k?

Kristi Hammond

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The term hierarchy refers to A. a situation in which higher species such as men will always be in control of lower species such as animals. B. a team in which everyone is equal and has to pull his or her own weight. C. a condition in which the weak must die so the strong can survive. D. a power structure in which each member knows his or her own place

Deborah Edwards

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What is the approximate weight of a 20-kg cannonball on earth

Jodi Brooks

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What is the passenger's apparent weight at t=1.0s?

Victoria Fowler

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_________ is the displacement of an object during a specific unit of time.

Rodney Fox

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The motor of a crane uses power p to lift a steel beam. by what factor must the motor's power increase to lift the beam twice as high in half the time?

Carlton Burgess

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The distances to nearby stars can be measured by using ____. a. absolute magnitude c. color b. temperature d. parallax

Alexa Spicer

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What accomplishment from the space industry benefits society? Developing a more powerful rocket booster The successful launch of communication satellites Zero-G toilets Better spacesuits

Timothy Norman

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Which of the following diagrams will give an erect image when completed. arrow before 2farrow at 2f arrow between 2f and f arrow at f arrow between f and lens

Eric Morgan

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Classify the following substance as diamagnetic or paramagnetic based on its magnetic properties. Drag the appropriate items to their respective bins. Download png

Theresa Perry

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The bent rod is supported at a, b, and c by smooth journal bearings. the rod is subjected to the force f = 980 n . the bearings are in proper alignment and exert only force reactions on the rod. determine the components of reaction at the bearing a using scalar notation.

Kristi Hammond

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Which type of cloud is often taken to be a sign of fair weather? A. Cumulus B. Altostratus C. Stratus D. Nimbostratus

Ronald Miller

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What increases as the temperature of a solid object rises? A. thermal energy B. potential energy C. volume D. mass

Jeffrey Rodriguez

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Which region of the Sun is typically about 6,000C? photosphere corona core radiative zone chromosphere convective zone

Kaitlin Dean

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The gravitational potential energy of an object Is always measured relative to the

Megan Page

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Is the following equation balanced? SO3 + 2H2O H2SO4 yes no

Carlton Burgess

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The only person who may ask questions during an employee performance review is the supervisor.

Jeffrey Rodriguez

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In the equation for the gravitational force between two objects, which quantity must be squared?

Jeremy Wood

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Which company has experienced censorship in China?

Zach Chandler

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Which of the following vectors is equal to r⃗ AB?

Deborah Edwards

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A ______ employs a weight and a wire to detect horizontal movement.

Timothy Norman

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Which one of the following types of training involves 10 to 30 minutes of high-intensity exercise? A. Anaerobic B. Long, steady distance C. Medium range D. Interval

Jessie Thompson

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A rock is dropped from a height of 2.5 meters. What is its velocity when it reaches the ground? a.3.5 meters/second b.7.0 meters/second c.12 meters/second d.14 meters/second e.49 meters/second

Alexa Spicer

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__________ reaction time is a stimulus response.

Tara Andrews

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The term angle of deviation is used in reference to A. a polarizer. B. a prism. C. a lens. D. an analyzer.

Samantha Barber

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Reducing access to waterways will lead to an increase in human impact on waterways. T/F

Nicholas Rivera

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Road rage is an aggressive driving incident where the driver has: Been insulted. De-escalated. Lost control. Nothing to lose.

Kristi Hammond

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What happens when solar energy heats a body of water?

Victoria Fowler

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The color of a mineral, such as fluorite, changes due to?

Theresa Perry

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Which of the following is an observation and not an inference?a.A cup with steam coming from it will be hot to the touch.b.Dark clouds in the sky will mean rain later in the afternoon.c.Bubbles form when two chemicals are mixed together.d.A plastic bag moving along the ground is being pushed by the wind.

Jeremy Wood

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Which of the following is not a way in which humans directly impact algal bloom production? a. industrial pollution b. wastewater discharge c. fertilizer in aquatic ecosystems d. fishing

Jessie Thompson

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Why does a light go out when you turn off the wall switch? A. The switch changes the direction of the flow of electrons. B. The switch causes a break in the circuit. C. The switch changes the circuit from series to parallel. D. The switch absorbs the electrical energy. would B be the correct answer?????????

Justin Parker

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Match the measurements to the correct number of significant figures A. 408.03 _1 B. 8.0 _2 C. 8.09 _3 D. 0.3 _4 E. 13.60 _5

Ronald Miller

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For what purpose are goods and services produced in a socialist economy? profits their usefulness to create demand to meet all consumer needs

Rodney Fox

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Velocity is the combination of which of the following? a. force & direction b. speed & direction c. gravity & direction d. speed & momentum

William Cain

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Write a description of how you know a chemical reaction is occurring.

Annie Barnes

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Which pair of properties apply to both sound and electromagnetic waves?

Jennifer Patterson

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How much heat is required to convert 0.3 kilogram of ice at 0°C to water at the same temperature? A. 100,375 J B. 450,759 J C. 334,584 J D. 167,292 J

Cynthia Baker

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Where do baymouth bars form across bays

Nicholas Rivera

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