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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
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Bertha has a mass of 50kg. abdul has a mass of 75kg. abdul and bertha stand 20m apart on the dance floor. they feel a (gravitational) attraction to each other. what is the magnitude of the force of at
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The ISS orbits the earth at an altitude of 400km (400000m). what is the earths gravitational field at that height?
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Ever tried to stop a 10 pound(68 kg) cannonball fired towards you at 30 mph(48 km/hr.)? no, probably not. but you may have tried to brace yourself in a car collision. how are the two situations simila
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Kepler and Newton studied the movement of planets. Kepler studied the speed of the planets while Newton studied the forces that kept the planets in place. Which of these statements best explains why t
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Pria's radio produces 80 useful energy units for every 100 units of electricity used. The efficiency of the radio is _____. 0.80 percent 20 percent 80 percent 100 percent
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A common theory about influenza is that it is a disease occurring primarily in cold weather. Doctors report incidences of illness such as influenza to the Centers for Disease Control (CDC). The graph
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In addition to the distance from a charged particle, what other factor determines the magnitude of the electric potential?
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The tungsten filament of a light bulb has a resistance of 0.09 ω. if the filament is 16 cm long, what is its diameter?
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In terms of r and c , determine the time required for the charge on the capacitor to rise to 50% of its final value.
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If the maximum force that any member can support is 8 kn in tension and 6 kn in compression, determine the maximum force p that can be supported at joint d. solution method of joints: in this case, th
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The gravitational force between the sun mass is 1.99 times 10 to 30 power kg and mercury mass 3.30 times 10 to 22rd power kg is 8.99 times 10 to 21st powerN how far is mercury from the sun
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A stuffed toy with a mass of 0.900 kilograms sits on the edge of a bed at a height of 0.830 if the toy falls off the bed what will it mechanical energy be at a height of 0.500 meters
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What is a common theme in H.G. Dell's works "The Island of Dr. Korean and The Invisible Man?"A.) danger of scientific advancement with out ethics.B.) danger of class different between upper and lower
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A and B are two points 50 meters apart on a straight path inclined at an angle α to the horizontal, where sin α = 0.05, with A above the level of B. A block of mass 16 kg is pulled down the path fro
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Explain these science review terms: Doppler Effect vs Doppler Radar ie Doppler Shift Mechanical Waves Particle nature of Light Wave nature of Light Electromagnetism Spectrum waves Compare/contra
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A 2.5 x 10^5 is used for 26.4 s to pull a boat straight toward shore how far does the boat move toward shore if a force of 4.2 x 10^4 is applied by the motor
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PLEASE HELP & HURRY!!! You have decided to do a science fair project involvong plants. which of the following represents a well- stated hypothesis? A. if I vary the amount of sunlight then the plant w
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Gloria wants to search for a website on home decor. What can Gloria type on her web browsers address line
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The region where warm and cold air masses meet is called a a. pocket. c. front. b. cloud. d. nimbus.
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You are working out on a rowing machine. each time you pull the rowing bar (which simulates the oars) toward you, it moves a distance of 1.1 m in a time of 1.3 s. the readout on the display indicates
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What will a spring scale read for the weight of a 50-kg woman in an elevator that moves upward with constant speed 5.0 m/s?
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A fire ant, searching for hot sauce in a picnic area, goes through three displacements along level ground: d1 for 0.40m southwest (that is, at 45° from directly south and from west), d2 for 0.50m due
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The turntable of a record player has an angular velocity of 6.1 rad/s when it is turned off. the turntable comes to rest 4.4 s after being turned off. through how many radians does the turntable rotat
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Tarzan, in one tree, sights jane in another tree. he grabs the end of a vine with length 28 m that makes an angle of 46° with the vertical, steps off his tree limb, and swings down and then up to jan