Master Physics with Fun Quizzes & Brain Teasers!

Q1) The molar specific heat of a diatomic gas is measured at constant volume and found to be 29. 1 J/mol. K. The types of energy that are contributing to the molar specific heat are: (a) translation only (b) translation and rotation only (c) translation and vibration only (d) translation, rotation, and vibration. And why?
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You are participating in a fresh water fishing tournament with the goal of catching the heaviest fish. You are in the middle of the river when you finally get your catch; unfortunately, you realize that you left the spring scales in your car. All you have in the boat are the paddles, your 16 Oz coffee mug, some rope, measuring tape, and a plastic bag. Required:Estimate the mass of the fish (in kilograms) using these items
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A Helmholtz resonator is a simple cylindrical cavity that suppresses most frequencies and strongly amplifies a few resonant frequencies.
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Which one of the following instrument is most suitable for measuring thickness ofthe physics book?A. Meter rule B. Vernier calipers C. Measuring tape D. Screw gauge
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A person climbs to the top of the tallest mountain in South America. Since they are farther away from the center of the Earth, how does their weight compare to what it was at the base of the mountain?
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What is the absolute index of refraction of medium x?
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What affects the thermal conductivity of earth materials? (Ex: Water, Soil, Sand, Air, etc.)
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Estimate how long dr.mann went without human contact while on the ice planet: the lazarus mission was ___ years ago. it takes ____ years to get to saturn from earth. copper and dr. brand were on millers planet for approximately _____ years. this means that the total time dr. mann went without human contact is: _____ years.
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A cardboard box sits on top of an asphalt driveway. the coefficient of static friction is 0.7 and the coefficient of friction is 0.4 . the mass of the box is 10 kg and a horizontal force of 15 n is applied. what is the gravitational force?what is the frictional force?what is the acceleration?
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In 1992, residents of Arkansas consumed, on average, 11. 4 L of gasoline pervehicle per day. If this amount of gasoline burns completely in a pure combustionreaction, it will release 4. 3 * 10% J of energy. Suppose this amount of energy istransferred by heat from a quantity of gas confined in a very large cylinder. Thecylinder, however, is equipped with a piston, and shortly after the energy istransferred by heat from the cylinder, work is done on the gas. The magnitude ofthe energy transferred by work is equal to one-third the magnitude of theenergy transferred by heat. If the initial internal energy of the gas is 1. 00 x 10J,what is the final internal energy of the gas?
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Define critical inductance for an L-section filter.
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An electronic device requires a power of 15 w when connected to a 9.0-v battery. how much power is delivered to the device if it is connected to a 6.0-v battery
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A horizontal, uniform board of weight 125 n and length 4 m is supported by vertical chains at each ends. a person weighing 500 n is sitting on the board. the tension in the right chain is 125 n.what is the tension in the left chain
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Write an equation for the strength of the electrostatic force for two charges that are separated by 10 meters. Use the Gizmo to check your equation
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A boy is carrying a bucket of water of mass 5 kg. If he does 500 J of work to what height will raise it?
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How do you convert 1440 am (amplitude modulation) to hertz (hz)?
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Turn on the timer and click the green circular button to start a wave pulse. Stop the timer when the wave pulse first hits the end of the string (when the final bead first starts to move). Do this a couple times to get a precise measurement of the time it took the wave pulse to cross the string. What is the wave velocity
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A baby mouse 1.2 cm high is standing 4.0 cm from a converging mirror having a focal length of 30 cm.
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Why do expanding, aging stars become cooler and more luminous? an overproduction of energy causes the outer layers of gas to expand, whereby the energy is absorbed and the temperature increases. the resulting increase in radiated energy leads to increased luminosity. a decrease in energy causes the outer layers of gas to expand and the temperature to decrease. the resulting increase in radiated energy leads to increased luminosity. a decrease in energy causes the outer layers of gas to expand and the temperature to decrease, and the resulting increase in surface area leads to increased luminosity. an overproduction of energy causes the outer layers of gas to expand. when this happens, the surface area increases rapidly while the temperature decreases rather slowly, and therefore the luminosity increases.
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A 250g ball falls vertically downward, hitting the floor with a speed of 3.5m/s and rebounding upward with a speed of 2.5m/s (a) find the change in the balls velocity. (b) find the change in the balls momentum.
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X-ray pulses from cygnus x-1, a celestial x ray source, have been recorded during high-altitude rocket flight. the signals can be interpreted as originating when a blob of ionized matter orbits a black hole with a period of 4.81 ms if the blob were in a circular orbit about a black hole whose mass is 27.7 times the mass of the situ, what is the orbit radius? the value of the gravitational constant is 6.67259 x 10^-11 n .m^2/kg^2 and mass of the sun is 1.991 x 10^30 kg. answer n units of km.
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A wave travels with a speed of 78m/s in air and it has a frequency of 42hz. What is the wavelength of this wave?
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Information:A jet of steam at 100 is directed for a short time on to a large block of ice at 0. Some of the steam condenses to form water and some ice is melted. The condensed steam forms 0. 40 kg of water at 0. Questions:1. Calculate the heat given out by this steam in changing to water without change in temperature. [Take the specific latent heat of vaporization of water as 2 200 kJ/kg]. 2. Calculate the heat given out by this water as it cools to the temperature of the ice. [Take the specific heat capacity of water to be 4. 2 kJ/(kg K). ]
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3) if tom cruise (red bike rider) is more massive than the other actor, which person has more momentum in mid-air? explain.4) if the total momentum of both riders added together is 2400 kgm/s before they collide, what is their total momentum after they collide? explain how you know that?5) is this collision elastic or inelastic? explain how you know.6) if tom is more massive and stronger than the other actor, compare the forces that they exert on each other when they collide. explain.7) what would this scene look like if it were done in space? what would be the same? what would be different? be sure to answer using the appropriate physics word (see top of page)
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