Physics, 25.02.2022 21:40 YokoUndera
A sample atom X has a half life of 7,000,000 years. If I you start with 840kg of atom x how much atom X is left after 4 half lives have passed?
Answers: 1
Physics, 21.06.2019 18:00
Abaseball has a mass of 0.145 kg and approaches a bat at 40.0 m/s. after it is hit, the ball leaves the bat at 50.0 m/s directly back. find the impulse of the bat on the ball. 7.25 kg*m/s 13.1 kg*m/s 5.80 kg*m/s 1.45 kg*m/s
Answers: 2
Physics, 22.06.2019 15:20
Acarpenter builds an exterior house wall with a layer of wood 2.9 cm thick on the outside and a layer of styrofoam insulation 2.3 cm thick on the inside wall surface. the wood has k=0.080w/(mโ
k), and the styrofoam has k= 0.010 w/(mโ
k). the interior surface temperature is 19.0 โc , and the exterior surface temperature is -15.0 โc . a.)what is the temperature at the plane where the wood meets the styrofoam? celsius b.)what is the rate of heat flow per square meter through this wall? /m^2
Answers: 2
Physics, 22.06.2019 15:20
Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60ยฐc while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.
Answers: 3
Physics, 22.06.2019 15:20
Talia is manufacturing rolls of wire for hanging pictures. she needs a material that is so that it can easily be pulled into wire without breaking.
Answers: 2
A sample atom X has a half life of 7,000,000 years. If I you start with 840kg of atom x how much ato...
Mathematics, 24.04.2020 19:39
Mathematics, 24.04.2020 19:39
Mathematics, 24.04.2020 19:40
Mathematics, 24.04.2020 19:40
Mathematics, 24.04.2020 19:40
History, 24.04.2020 19:40
Mathematics, 24.04.2020 19:40
Social Studies, 24.04.2020 19:40
Mathematics, 24.04.2020 19:40
Mathematics, 24.04.2020 19:41