Answers: 1
Physics, 22.06.2019 05:20
Which statement is true? a. kepler's laws apply only to the motion of earth. b. kepler's laws can be used to predict eclipses. c. kepler's laws are true for a central force that is directly proportional to distance. d. kepler's laws can be deduced from newton's laws of motion and gravity.
Answers: 2
Physics, 22.06.2019 10:00
In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final
Answers: 3
Physics, 22.06.2019 10:50
Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.
Answers: 3
Physics, 23.06.2019 02:40
An impulse is the product of the on an object and time during which it is applied
Answers: 2
A car starts from xi=18m at tI=0...
Mathematics, 28.09.2020 17:01
History, 28.09.2020 17:01
Business, 28.09.2020 17:01
World Languages, 28.09.2020 17:01
Mathematics, 28.09.2020 17:01
Chemistry, 28.09.2020 17:01
Social Studies, 28.09.2020 17:01
Social Studies, 28.09.2020 17:01
Chemistry, 28.09.2020 17:01
Health, 28.09.2020 17:01