During a camping trip, sierra collected dry branches and broke them into smaller pieces. she then placed the sticks in a fire pit and used a match to light the sticks on fire. next, she propped a metal pan of water over the fire and heated it until the water boiled. which list correctly describes physical and chemical changes that occurred in this scenario? physical change: breaking sticks chemical changes: lighting the fire, boiling water physical change: boiling water chemical change: breaking sticks, lighting the fire physical changes: lighting the fire, boiling water chemical change: breaking sticks physical changes: breaking sticks, boiling water chemical change: lighting the fire
Answers: 1
Physics, 22.06.2019 10:00, Kenemcaid6979
Explain the comparisons between nature and packingtown that appears on pages 81 and 82 answer
Answers: 2
Physics, 22.06.2019 17:00, Gabriel134
Two conductors, a and b, are each in the shape of a tetrahedron. but of different sizes. they are charged in the following manner: 1. tetrahedron a is charged from an electrostatic generator to charge q. 2. tetrahedron a is briefly touched to tetrahedron b. 3. steps 1 and 2 are repeated until the charge on tetrahedron b reaches a maximum value. if the charge on tetrahedron b was q/4 after the first time it touched tetrahedron a. what is the final charge qbmax on tetrahedron b?
Answers: 2
Physics, 22.06.2019 19:20, anaiyamills
Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.
Answers: 1
During a camping trip, sierra collected dry branches and broke them into smaller pieces. she then pl...