Ultimate Physics Study Guide - Questions & Answers

a cellist tunes the c-string of her instrument to a fundamental frequency of 65.4 hz. the vibrating portion of the string is 0.615 m long and has a mass of 14.8 g .
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suppose 29.0 g of ice at -10.0c is placed into 300.0 g of water in a 200.0-g copper calorimeter. the final temperature of the water and copper calorimeter is 18.0c.
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assuming a frictionless massless pulley determine the acceleration of the blocks once they are released from rest
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which of the following types of radiation has the highest velocity? which of the following types of radiation has the highest velocity? x rays visible infrared ultraviolet all radiation has the same velocity.
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A certain electronic company supplies electricity to residential customers for a monthly charge of $10.00 plus 7.5 cents per kilowatt-hour for up to 1000 kilowatt-hours.a) Write a linear equation that relates the monthly charge C, in dollars, to the number x of kilowatt-hours used in a month, 0x1000.b) Sketch a graph of the equation.c) Determine the monthly charge for using 200 kilowatt-hours.d) Determine the monthly charge for using 500 kilowatt-hours.e) Interpret the slope of the line.
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A student received this anemometer as gift: He wants to try it out but the wind is not blowing outdoors He turns on an electric; fan and places the anemometer a constant 0.5 meter in front of the fan_ He sees these digital readings during 10 seconds: 9.62,9.61, 9.63,9.61,9.63,9.61 and 9.62 km/hr: These data are demonstrating which Ptype of experimental error intrinsic systematic error random error in measurement systematic error in measurement intrinsic random error
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A 15.0 kg stone slides down a snow-covered hill (the figure (Figure 1)), leaving point A with a speed of 10.0 m/s . There is no friction on the hill between points A and B, but there is friction on the level ground at the bottom of the hill, between B and the wall. After entering the rough horizontal region, the stone travels 100 m and then runs into a very long, light spring with force constant 2.30 N/m . The coefficients of kinetic and static friction between the stone and the horizontal ground are 0.20 and 0.80, respectively.a) What is the speed of the stone when it reaches point B?b) How far will the stone compress the spring?c) Will the stone move again after it has been stopped by the spring?
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the glass core of an optical fiber has an index of refraction 1.60. the index of refraction of the cladding is 1.49. you may want to review
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A long, thin solenoid has 900 turns per meter and radius 2.50 cm. The current in the solenoid isincreasing at a uniform rate of 60.0 A/s. What is the magnitude of the induced electric field at apoint near the center of the solenoid and (a) 0.500 cm from the axis of the solenoid; (b) 1.00 cmfrom the axis of the solenoid?
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Arteriosclerotic plaques forming on the inner walls of arteries can decrease the effective cross-sectional area of an artery. Even small changes in the effective area of an artery can lead to very large changes in the blood pressure in the artery and possibly to the collapse of the blood vessel.Imagine a healthy artery, with blood flow velocity of v0=0.14m/s and mass per unit volume of rho=1050kg/m3. The kinetic energy per unit volume of blood is given byK0=12rhov20.Imagine that plaque has narrowed an artery to one-fifth of its normal cross-sectional area (an 80% blockage).A) Compared to normal blood flow velocity, v0, what is the velocity of blood as it passes through this blockage? (Show your work)B) By what factor does the kinetic energy per unit of blood volume change as the blood passes through this blockage?C) As the blood passes through this blockage, what happens to the blood pressure?1. It increases by about 41 Pa2. It increases by about 250 Pa3. It stays the same4. It decreases by about 41 Pa5. It decreases by about 250 PaD) Relative to its initial, healthy state, by what factor does the velocity of blood increase as the blood passes through this blockage?E) By what factor does the kinetic energy per unit of blood volume increase as the blood passes through this blockage?F) What is the magnitude of the drop in blood pressure, p, as the blood passes through this blockage? Use K0 as the normal (i.e., unblocked) kinetic energy per unit volume of the blood. (Show your work)
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The velocity of the source is positive if the source is ______________. Note that this equation may not use the sign convention you are accustomed to. Think about the physical situation before answering.traveling away from the listener
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A driver in a moving car applies the brakes. The car slows to a final speed of 2.60 m/s over a distance of 40.0 m and a time interval of 8.45 s. The acceleration while braking is approximately constant.a) What is the car's original speed before braking?(b) What is its acceleration during this time? (The car's initial velocity is in the positive direction. Indicate the direction with the sign of your answer.)
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when an object of unknown mass is attached to an ideal spring with force constant 130 n/m, it is found to vibrate with a frequency of 7.25 hz.
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The choice of what goes into a map and what is left out, and arguably the most important and foundational form of cartographic abstraction and generalization is... ...selection. ...symbolization. ...simplification. ...classification.
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Which statement below best explains why the James Webb Space Telescope was optimized for infrared viewing in order to study early galaxy formation in the universe?The earliest galaxies were cooler than todays galaxies, so rather than emitting light in visible wavelengths they emitted mostly infrared light.It didnt actually need to be optimized for infrared viewing; this choice was the result of a global vote by astronomers based on their own preferences.The earliest galaxies were hotter than todays galaxies, so rather than emitting light in visible wavelengths they emitted mostly infrared light.The earliest galaxies are the most distant, and universal expansion has redshifted their spectra into infrared wavelengths.The details of how a galaxy formed are encoded in the infrared portion of its spectrum.
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Which of these statements are correct about laws and theories? Laws become theories after experimentation. Theories become laws after experimentation. Laws and theories are universal truths which cannot be verified. Theories cannot become laws and laws cannot become theories.
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a rectangular coil moving at a constant speed v enters a region of uniform magnetic field from the left. while the coil is entering the field, the direction of the magnetic force is
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A 5.45-m radius air balloon loaded with passengers and ballast is floating at a fixed altitude. Determine how much weight (ballast) must be dropped overboard to make the balloon rise 106 m in 21.5 s. Assume a constant value of 1.2 kg/m3 for the density of air. Ballast is weight of negligible volume that can be dropped overboard to make the balloon rise.
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which of these situations corresponds to n independent bernoulli trials having the same probability p of success?
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yoda and elf are cats. They both weigh the same. They start out chasing a mouse at the same speed, but Elf runs faster when she gets closer to the mouse and ended up catching the mouse. what is true about the kinetic energy of elf just before she catches the mouse?
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A hippo's body is 4.0 m long with front and rear feet located as in (Figure 1). The hippo carries 60% of its weight on its front feet. Figure
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A series RL circuit contains two resistors. The resistors are 60 and 30 . When calculating the circuit values, the total resistance used is _____.60 80 30 90
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if the magnetic field inside the inner solenoid (r
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differential equations many problems in physics require you to solve equations that depend on velocity or acceleration. take for example, that a functions velocity at a point depends on its displacement
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