Ultimate Physics Study Guide - Questions & Answers

at what time does the particle have a velocity of 20 mys? (b) at what time is the acceleration 0? what is the significance of this value of t?
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if 8 different amplitudes are used, how many bits can be transmitted with each amplitude change? if 16 different frequencies are used, how many bits can be transmitted with each frequency change?
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determine the energy levels and the corresponding eigenstates for a par- ticle of mass m, subject to a potential energy v (x) g
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to meet a u.s. postal service requirement, footwear must have a coefficient of static friction of 0.525 or more on a specified tile surface. a typical athletic shoe has a coefficient of 0.785. in an emergency, what is the minimum time interval in which a person starting from rest can move 2.85 m on a tile surface if she is wearing the following footwear?
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a wall of a small house is 3 meters by 3 meters and is insulated using material that is similar to styrofoam (see table above). the styrofoam is about 2.5 cm thick. a heater inside the house keeps the temperature at 25 c while it is 0 c outside the shed. how much power in watts does the heater use just to make up for the heat lost through this one wall.
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the middle-c hammer of a piano hits two strings, producing beats of 1.25 hz. one of the strings is turned to 240.00 hz. what frequencies (in hz) could the other string have? (answer to the nearest 0.1 hz.)
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if a typical family of four uses electric energy at an average rate of 700 w , how many kwh would their electric bill show for one month (30 days)?
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a baseball is thrown by a pitcher at 95 mph through standard air. the diameter of the baseball is 2.82 in. estimate the drag force on the baseball
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find the magnitude and direction of the weakest magnetic field required to levitate a wire of length 5.30 cm and mass 1.80 g, carrying a current of 8.16 a.
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in the above problem involving 1200 kg car a moving at 70 km/h rear ending 900 kg car b moving at 60 km/h, when car b accelerates to 70 km/h, what fraction of ke is lost by car a?
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a block of known mass m is on a disk that rotates about its center, as shown above. the block does not slip on the disk, and travels at a constant tangential speed v when at a distance r from the center with a centripetal force of magnitude f exerted on it. which of the following statements about other quantities that might be determined is correct?
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a hypodermic syringe (see fig. p5.30) is used to apply a vaccine. if the plunger is moved forward at the steady rate of 20 mm/s and if vaccine leaks past the plunger at 0.1 of the volume flowrate out the needle opening, calculate the average velocity of the needle exit flow. the inside diameters of the syringe and the needle are 20 mm and 0.7 mm.
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when the distance between two masses doubles, the strength of the gravitational force between them
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what is the equation describing the motion of a mass on the end of a spring which is stretched 8.8 cm from equilibrium and then released from rest, and whose period is 0.66 s ? assume that the displacement at the start of the motion is positive.
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a spaceship is traveling through space. suddenly, its speed increases. what can you say about the kinetic energy of the spaceship?
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assuming the oligopeptide alphahelicks forms one continuous -helix, the carbonyl oxygen of the glutamic acid residue is hydrogen bonded to the amide nitrogen of
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rugged cabin co. provides pre-made materials to build cabins. to ensure materials are in supply and ready for quick delivery, the company offers cabins in only three sizes. each cabin has rectangular floor plan where the length is equal to 5 feet more than twice the width. which expression represents the area, in square feet, for each cabin size?
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what are the correct coefficients if the law of conservation of mass is applied to the decomposition of solid ammonium nitrite to nitrogen gas and liquid water?
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Based on the equation for momentum, if both the soccer ball and the beach balls are rolling at the samevelocity, which one will have more momentum?A. Soccer ballB. Beach ball
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The water heater in a home uses 150 V of electrical charge on a 40 A circuit. What is the water heater's electrical power? 0.27 W 3.75 W 6,000 W 60,000 W
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The elevator descends with an acceleration of 0.9 m/s. Find how much a 95 kg person weighs in it at the moment of descent.
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alice and bob stand on the roof of a building, each with a soccer ball. alice kicks her ball perfectly horizontally, giving it some velocity in the x-direction. bob instead drops his ball straight down from the edge of the roof. if they do so at exactly the same time, which ball hits the ground first?
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a 15.0 kg plate head explodes into three pieces a 6.0 kg chunk flies off at 12.0 m/s 15o n of w and a 5.0 kg chunk sails at 8.0 m/s 35o e of s. what is the velocity of the final piece?
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a bullet hits a block at rest, the resulting kinetic energy if 6 j what is the bullet starting speed
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