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A source of sound waves approaches a stationary observer through a uniform medium. Compared to the frequency and wavelength of the emitted sound, the observer would detect waves with a? A) Higher freq
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Lena would like to be able to know her exact location on a map as she travels across the country. Which technology would best help Lena? CB radio, because it uses HF radio waves. MRI, because it uses
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A motor boat travels east with a velocity of 4 meters/second relative to the water when it encounters a current with a velocity of 7.0 meters/second north relative to the shore. What is the resultant
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Which describes the difference between ionic and covalent bonds? A. An ionic bond forms when molecules of opposite charges are attracted to each other; covalent bonds are formed when nonmetal compoun
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I need a lab report please check the picture that i attached first. Thank you.
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Which of the following is a part of the geocentric model? All objects in the universe are perfect spheres. All objects in the universe move around the sun. All objects in the universe revolve around E
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Density involves the amount of a material in a certain volume. When a material changes phases, it changes in density in a predictable way as the amount of material stays the same but the molecules get
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The image below shows two opposite forces acting on a rope, what can we say is true about the affect of the forces on the rope? A) It cannot be determined without knowing which man is stronger. B) It
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I need a lab report please check the picture that i attached first. Thank you.
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Imagine you are examining a system that involves the development of more fuel efficient school buses. In the Universal Systems Model, the feedback step would include which of the following? a) Compari
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Jennifer regularly instructs her students to avoid believing age-old theories about the differences between men and women. “As it turns out”, she says, “men and women are far more alike than we
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Because parents are concerned that children are learning "wrong" science from TV, you have been asked to be a technical advisor for a science fiction cartoon show on Saturday morning. In the plot, a v
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A miner develops cancer of the esophagus. Ten years before, he had been exposed to radiation when he worked for a year in a mine. He had also smoked cigarettes for a number of years, but had quit five
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PLEASE HELP WILL GIVE BRAINLESS ANSWER Sea ice has decreased to 3.41 million square kilometers, which is about 50 percent smaller than it was in the year 2000. List two animals that will need to adap
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A child Twirls his yo-yo horizontally about his head rather than using it properly. the yo-yo has a mass of .2 kg and is attached to a string .8 m long. if the yo-yo makes a complete Revolution each s
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Determinate the phase difference between tow waves overlaping on an infinitely large screen placed at distance D from two point sources A and B as a function of the coordinate y where the waves overla
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A disc of radius r moving ion perfectly smooth surface at aspeed v collides elastically with an identical stationarydisc.Express the magnitude and direction of the velocity of each ofthe discs after t
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An astronaut in a spacecraft looks out her window and observes a comet travel in the opposite direction at a relative speed of 237 m/s. The velocity of the spacecraft is 114 m/s directly away from the
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Which change will cause the gravitational force between a baseball and a soccer ball to increase ? Check all that apply Moving the balls closer together Moving the balls further apart Wrapping the
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My teacher has asked me to keep an eye on Tiangong-1 because I am the only person in my class that she actually trusts not to prank her. If there is anyone out there that can help me monitor our star
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How boiling point and vapor pressure is related to each other Explain in detailHow boiling point and vapor pressure is related to each other Explain in detailHow boiling point and vapor pressure is re
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What is boiling point expplain clearly
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How boiling point and vapor pressure is related to each other Explain in detail
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A silver cube has sides that measure 2.5 meters. The cube is heated from 15°C to 30°C. What is the change in its volume?
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Eddie and Val observed the picture of an athlete running in a race. Eddie stated the picture shows potential energy being transformed to kinetic energy. Val stated that it shows chemical energy being
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Westinghouse and edison fought what was known as the war of the currents. Eventually, westinghouse triumped using Alternating current for power distribution. Alterning current is better for power gene
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Which aspect is similar in both chemical and nuclear reactions? A. Both involve nuclear fusion. B. Both involve nuclear fission. C. Both may release heat and light. D. Both involve the exchange of
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What is the maximum possible speed of an impact on the surface of earth for a faraway body initially at rest that falls to earth by virtue of earth's gravity only?
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Wet steam in a steam line at 2000 kpa is throttled to 100 kpa and 120 °c. what is the quality in the steam line prior to throttling?
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The electric motor of a model train accelerates the train from rest to 0.730 m/s in 23.5 ms. the total mass of the train is 875 g. (a) find the minimum power delivered to the train by electrical trans
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In a two-slit interference experiment, a viewing screen is placed 5 meters directly behind two slits separated by 4 µm. coherent, monochromatic light of wavelength λ = 700 nm emerges (in phase) from
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Consider a fish 1.2 m below the surface of a quiet lake. at approximately what angle from the horizontal would the fish look up to see a fisherman standing on a distant dock? (nwater = 1.33) a.
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A box of weight 74 N is sliding on a horizontal surface at a constant velocity due to an external force of magnitude 4.8 N. A normal force (n) and a friction force (f) also act on the box. After the m
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A region in a ferromagnetic material that has a large number of atoms with aligned magnetic fields is called a ____. A) magnetic domain B) magnetosphere C) magnetic declination D) ferromagnetic regi
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What is the concentration of H+ ions at a pH = 2? mol/L What is the concentration of OH– ions at a pH = 2? mol/L What is the ratio of H+ ions to OH– ions at a pH = 2? : 1
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A sound wave is passing by a student 250 times every second. What is the frequency of the sound wave? 25 s 1 second 250 Hz 1/250 Hz
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HELP PLEASE <3 According to Newton's Third Law, what is the equal and opposite force to the downward force of gravity pulling on a man standing on the beach?
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Read the excerpt from Bruno’s summary of Gulliver's Travels.When Gulliver tours the academy, he sees a man attempting to get sunbeams out of cucumbers and a man trying to turn ice into gunpowder.Thi
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You are learning about energy transformations in science class. Mel and Sam's built this set-up to see if light energy could be transformed into _________ energy.
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When the starter motor on a car is engaged, there is a 260 a current in the wires between the battery and the motor. suppose the wires are made of copper and have a total length of 1.4 m ?
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What would happen to the magnetic field inside this solenoid if you doubled the number of turns while simultaneously stretching the solenoid to twice the original length? assume the voltage applied wa
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What is the smallest capacitor needed in a computer power supply in order to produce at least 4.50 v for 0.74 seconds after the power goes off? assume that the resistance of all the components of the
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What is the electric potential vtot at the center of the square? make the usual assumption that the potential tends to zero far away from a charge what would be the kinetic energy k2q of charge 2q at
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Two identical capacitors are connected in parallel to an ac generator that has a frequency of 690 hz and produces a voltage of 24 v. the current in the circuit is 0.2 a. what is the capacitance of eac
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If the resistance in the coil is 5.0 Ï, what is the magnitude of the induced current in the coil while the field is changing?
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If he(g) has an average kinetic energy of 4990 j/mol under certain conditions, what is the root mean square speed of cl2(g) molecules under the same conditions?
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Which one of the following scenarios accurately describes a condition in which resonance can occur? A. A column of air has a height equal to 1⁄8 of the wavelength of the sound waves produced by a tu
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An 85,000 kg stunt plane performs a loop-the-loop, flying in a 260-m-diameter vertical circle. at the point where the plane is flying straight down, its speed is 55 m/s and it is speeding up at a rate
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HELP QUICK ! How would farmers help their neighbors keep their homes when they could not repay their bank loans? a. size b. charge c. temperature d. motion
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When a person does work on an object, the object gains energy. As a bicycle rider rides from the bottom of a hill up a hill, the energy from the work being can become which combination of types of ene
