Jackline98

100 g of liquid nitrogen at its boiling point of 77 K is stirred into a beaker containing 500 g of 15°C water. If the nitrogen leaves the solution as soon as it turns to gas, how much water freezes? The heat of vaporization of nitrogen is 48 cal/g and that of water is 80 cal/g. - ️️none A metal bar is used to conduct heat. When the temperature at one end is 100°C and at the other is 20°C, heat is transferred at a rate of 16 J/s. If the temperature of the hotter end is reduced to 80°C, w...

Which of the following is not true? A. Engineering activities require students to apply science knowledge and ideas. B. Engineering activities allow students to make predications about how things work and see what happens. C. Engineering activities can elicit students ideas about science. D.Engineering activities allow students to develop their understanding of engineering design, a way of thinking about engineering problems. E. Engineering activities help students learn to carefully ...

A 0.20-kg mass is oscillating on a spring over a horizontal frictionless surface. When it is at a displacement of 2.3 cm for equilibrium it has a kinetic energy of 1.5 J and a spring potential energy of 2.3 J. What is the maximum speed of the mass during its oscillation? - ️️6.2 m/s The air in a tube open at both ends is sent into its fundamental resonance. One end of the tube is then closed and the air column is again set into its fundamental resonance. The resonant frequency ____ after th...

At which planet can the pole remain in darkness for 42 years, then have 42 years of constant daylight? - ️️Uranus Compare the atmospheres of Mars and Venus. - ️️Both are chiefly carbon dioxide, but at Mars it can freeze as dry ice. Compared with Earth's orbit, the orbit of Jupiter is approximately - ️️5 times larger. Consider the orbiting system around Saturn. Within close proximity to Saturn are rings of material that are composed of hundreds of thousands of small particles. O...

Which skater, if either, has the greater momentum after the push-off? Which skater, if either, has the greater speed after the push-off? - ️️A: Both have the same momentum B: Paula Two men, Joel and Jerry, push against a wall. Jerry stops after 10 min, while Joel is able to push for 5.0 min longer. Compare the work they do. - ️️Neither does any work - no distance covered You drop a ball from a high balcony and it falls freely. Part A Does the ball's kinetic energy increase b...

Which one of the following statements is true concerning the spacing of the electric field lines in the vicinity of two point charges of equal magnitude and opposite sign? A) The spacing indicates the direction of the electric field. B) The spacing does not depend on the magnitude of the charges. C) The spacing is large when the magnitude of the charges is large. D) The spacing indicates the relative magnitude of the electric field. E) The spacing is small when the magnitude of the charge...

Suppose you are compressing a gas with a piston. Both the gas cylinder and piston are heavily insulated. In Stop to Think 19.4 (p. 525), which first-law bar chart describes this process? a) Chart A b) Chart B c) Chart C d) Chart D - ️️a) Chart A You and your classmates are asked to consider what would happen to you if Earth's gravity was suddenly turned off. One of your classmates says that you would be pushed off Earth into space by the centrifugal force exerted on you by Earth's...

Which situation most closely aligns with Puritan Calvinist princples? - ️️Ellie works at a bakery. She rises before dawn and works on perfecting her pastries, even though her boss does not require this, because she feels a desire to share her God-given talents. Which statement best describes a key development that enabled the Jamestown settlers to start carving a path our of the Human Predicament? - ️️They elected representatives to the House of Burgesses, which gave them hands-on polit...

according to john judis, what are current populists fighting against? - ️️market liberalism according to Justice ch 6, how does Rawls believe that we would write a social contract if we did so before we knew what our standing in society would be? - ️️we would create a contract that would protect us if we became poor in case we were so unfortunate according to Justice ch 6, the leaky toilet example illustrates multiple moral limits of contracts. all of the following are moral limits inc...

What does opportunity cost refer to? - ️️The cost of the next-best alternative. Not necessarily a monetary cost, but what you are giving up. What does specialization refer to? - ️️Without being completely self-sufficient, we need to specialize in something we can exchange with others. What is a command/planned economy? - ️️An economic system where the government controls exchanges and the allocation of resources--government agencies decide what will be produced and by whom. What i...