Concept explainers
There are two important isotopes of uranium,
Want to see the full answer?
Check out a sample textbook solutionChapter 2 Solutions
University Physics Volume 2
Additional Science Textbook Solutions
Conceptual Integrated Science
Modern Physics
Essential University Physics (3rd Edition)
Glencoe Physical Science 2012 Student Edition (Glencoe Science) (McGraw-Hill Education)
Physics for Scientists and Engineers with Modern Physics
Lecture- Tutorials for Introductory Astronomy
- A gas bottle contains 4.64×10²³ Hydrogen molecules at a temperature of 384.0 K. What is the thermal energy of the gas? (You might need to know Boltzmann's constant: kg = 1.38×10-23 J/K.) Submit Answer Tries 0/12 How much energy is stored in ONE degree of freedom for the whole system? Tries 0/12 What is the average energy of a single molecule? Submit Answer Tries 0/12 On average how much energy is stored by ONE degree of freedom for ONE single molecule? Submit Answer Tries 0/12 Submit Answerarrow_forwardA person taking a reading of the temperature in a freezer in Celsius makes two mistakes: first omitting the negative sign and then thinking the temperature is Fahrenheit. That is, the person reads – x °C as x °F . Oddly enough, the result is the correct Fahrenheit temperature. What is the original Celsius reading? Round your answer to three significant figures.arrow_forwardA container filled with an ideal gas is connected to a reservoir of the same gas so that the number of moles in the container can change. If the pressure and volume of the container are each doubled while the temperature is held constant, what is the ratio of the final to the initial number of moles in the container?arrow_forward
- In a gas that is a mixture of water (two H and one O) and carbon dioxide (one C and two O), if the water has average velocity of 347 m/s, what is the average velocity of the carbon dioxide molecule? Give your answer as number in units of m/s without entering the units.arrow_forwardCephalopods, such as octopi and squids, can use a form of jet propulsion to move quickly through the water. This technique of locomotion is useful in providing short bursts of speed to catch prey and to avoid predators, and it gives them the title of fastest marine invertebrates. Oxygenated water is taken in by the cephalopod and then expelled by muscular contraction through an opening called the hyponome. Assume a 5.0 kg squid draws in 0.44 kg of water and then quickly (in 0.12 s) expels this water at a speed of 10.1 m/s. What is the recoil speed of the squid just after the water is expelled?arrow_forwardA gas expands from I to F in the figure below. The energy added to the gas by heat is 276 J when the gas goes from I to F along the diagonal path. A pressure-volume graph consists of points and line segments plotted on a coordinate plane, where the horizontal axis is V (liters)and the vertical axis is P (atm). Three points are plotted: point I at (2, 4) point A at (4, 4) point F at (4, 1) Line segments connect the three points to form a triangle. Arrows along the line segments point from I to A, from A to F, and from I to F. (a) What is the change in internal energy of the gas? J (b) How much energy must be added to the gas by heat along the indirect path IAF?arrow_forward
- A 2 cm diameter spherical fishing lure is cast into a pond and, though it submerges, it does not sink to the bottom but “floats” wherever it is placed (this is called neutral buoyancy). How many grams is this lure?arrow_forwardA gas chamber is to be designed to separate two gases with the following specifications: Hot gas temperature 1145°C Cold gas temperature 45°C Hot gas heat transfer coefficient 230 W/m² K Cold gas heat transfer coefficient 290 W/m² K Metal wall thermal conductivity 115 W/m K If the maximum temperature of the wall on the hot side does not exceed 545°C, using thermal resistance concept, what thickness should the metal wall between the hot gas and cold gas be in mm?arrow_forwardA gas bottle contains 4.15×1023 Nitrogen molecules at a temperature of 354.0 K. What is the thermal energy of the gas? (You might need to know Boltzmann's constant: kg = 1.38x10-23 J/K.) 3041 J Submit Answer Incorrect. Tries 1/20 Previous Tries How much energy is stored in ONE degree of freedom for the whole system? 1.01x103 J are correct. Your receipt no. is 159-4121 O Previous Tries What is the average energy of a single molecule? 7.33x10^-21 J Submit Answer Incorrect. Tries 1/20 Previous Tries On average how much energy is stored by ONE degree of freedom for ONE single molecule? 2.44x10-21 j are correct. Your receipt no. is 159-1592 0 Previous Triesarrow_forward
- Archimedes tells us the lifting power of a balloon (how much mass it can lift) is equal to the difference between the mass of the balloon and the mass of the air it displaces. That is, if the balloon occupies the same volume as 10kg of air, but the balloon only weighs 2kg , then the balloon can lift 8kg . Airships have sometimes been filled with hydrogen ( H2 ), but hydrogen is very flammable, and after the Hindenburg caught fire and crashed in 1937 with serious loss of life airships have nearly always been filled with helium ( He ) instead. gas density H2 0.090kgm3 He 0.18kgm3 air 1.23kgm3 Suppose a new airship Star of Balogna will have the shape of a cylinder 100.m long, with a radius of 15.0m , and will weigh 9100.kg without any gas inside it. Suppose also the average passenger weighs 81kg . Calculate how many passengers the Balogna could carry if it were filled with hydrogen, and also if it were filled with…arrow_forwardIf you launch a projectile upward with a high enough speed, its kinetic energy is sufficient to allow it to escape the earth’s gravity— it will go up and not come back down. Given enough time, hydrogen and helium gas atoms in the earth’s atmosphere will escape, so these elements are not present in our atmosphere. Explain why hydrogen and helium atoms have the necessary speed to escape but why other elements, such as oxygen and nitrogen, do not.arrow_forwardThere are two important isotopes of uranium- 235 U and 238 U; these isotopes are nearly identical chemically but have different atomic masses. Only 235 U is very useful in nuclear reactors. One of the techniques for separating them (gas diffusion) is based on the different average velocities Vrms of uranium hexafluoride gas. UF6. (a) The molecular masses for 235 U UF6 and 238 U UF6 are 349.0 g/mol and 352.0 g/mol, respectively. What is the ratio of their average velocities?arrow_forward
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning