Physics, 05.05.2020 04:03 beelcypher
You place a chunk of naturally radioactive (it means not enriched for nuclear purposes) material on the not very exact scale and scale reads approximately 50 kg. You know that the half-life of this material is 20 days. After 40 days of observation the scale reading will be: Group of answer choices
approximately 50 kg
approximately 25 kg
approximately 12.5 kg
Between 12.5 kg and 25 kg, depending on activity
Answers: 3
Physics, 21.06.2019 16:00
In a laboratory, nakisha mixes sodium hydroxide solution with an indicator called phenolphthalein. when combined, they create a pink solution. nakisha wonders if mixing other solutions with phenolphthalein will also create this pink color. how could she use the scientific inquiry process to explore it further?
Answers: 1
Physics, 22.06.2019 00:10
The energy released by a chemical reaction can be measured using a calorimeter. when barium hydroxide octahydrate crystals are reacted with dry ammonium chloride inside of a coffee cup calorimeter, the temperature of the 18.00 g of water in the calorimeter decreases from 30.0°c to 8.0°c. the equation for calculating energy absorbed or released by a reaction is: where q is the energy released or absorbed, m is the mass of water in the calorimeter, cp is the specific heat of water, and δt is the observed temperature change. if the specific heat of liquid water is 4.19 j/g·°c, how much energy was absorbed by the reaction?
Answers: 3
Physics, 22.06.2019 06:00
The magnetic field inside a superconducting solenoid is 4.50 t. the solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. determine (a) the magnetic energy density in the field and (b) the energy stored in the magnetic field within the solenoid.
Answers: 2
Physics, 22.06.2019 09:00
What changes occur in the brain during the teenage years? 25 points, someone me out!a.) thinking becomes slower as the brain grows larger. b.) connections between neurons become stronger and faster. c.) unused neurons fuse together to form larger, better functioning neurons. d.) more neurons are developed.
Answers: 2
You place a chunk of naturally radioactive (it means not enriched for nuclear purposes) material on...
SAT, 14.12.2021 04:30
Mathematics, 14.12.2021 04:30
English, 14.12.2021 04:30
Mathematics, 14.12.2021 04:30
Mathematics, 14.12.2021 04:30
Chemistry, 14.12.2021 04:30
Mathematics, 14.12.2021 04:30
History, 14.12.2021 04:30
Mathematics, 14.12.2021 04:30