Physics, 17.03.2020 06:30 debrielcalderon
A radioactive nucleus has a half-life of 5*108 years. Assuming that a sample of rock (say, in an asteroid) solidified right after the solar system formed, approximately what fraction of the radioactive element should be left in the rock today? The age of the solar system is 4.5*109 years. (No calculator is necessary, but if it helps use it.)
Answers: 2
Physics, 22.06.2019 10:30
What are two different ways you could find the value of a? explain these methods.
Answers: 2
Physics, 22.06.2019 10:40
As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.
Answers: 1
Physics, 22.06.2019 12:30
Write a full page that sumerizes thermodynamics it’s from the website visionlearnig
Answers: 1
Physics, 22.06.2019 13:30
Which is not an example of how an object gains elastic potential energy by stretching? a. jumping on a pogo stick b. pulling on a rubber band c. jumping on a trampoline
Answers: 1
A radioactive nucleus has a half-life of 5*108 years. Assuming that a sample of rock (say, in an ast...
Chemistry, 07.10.2019 09:30
History, 07.10.2019 09:30
Health, 07.10.2019 09:30
Mathematics, 07.10.2019 09:30
Mathematics, 07.10.2019 09:30
Business, 07.10.2019 09:30
Mathematics, 07.10.2019 09:30
Biology, 07.10.2019 09:30
English, 07.10.2019 09:50
Geography, 07.10.2019 09:50
English, 07.10.2019 09:50
Mathematics, 07.10.2019 09:50