Answer:
Allan Sandage
Explanation:
Allan Sandage is an american astronomer that has undertaken extensive efforts to evaluate Hubble's constant rate of universe expansion.
in the beginning of his career in 1958 , the primary focus of Allan is to evaluate the Hubble's constant rate.
He used many different techniques to determine the distance to several galaxies. From these many different calculations, average value of Hubble's constant was about 50 km/sec/megaparsec.
If this is an actual problem you need to add more
Answer:
The correct answer is option C "Specified time period has elapsed"
Explanation:
In operant molding, a fixed-interim timetable is a calendar of support where the main reaction is compensated simply after a predefined measure of time has passed. This timetable causes high measures of reacting close to the finish of the interim however much more slow reacting following the conveyance of the reinforcer.
As you may recall, operant molding depends on either support or discipline to fortify or debilitate a response.1 This procedure of learning includes framing a relationship with conduct and the results of that conduct. Practices that are trailed by alluring results become more grounded and consequently bound to happen again later on. Activities that are trailed by ominous results become less inclined to happen again later on.
The world is feeling the fallout from rising temperatures and changing climates. Disasters are getting stronger and more frequent. Droughts are lasting longer. Weather patterns are less predictable. Farming practices that were once stable are no longer effective. Smaller harvests leave families with less to eat and sell.
