Answer:
The true statement is d.
Explanation:
Nuclear fusion is the process in which two lighter nuclei are combined to form one heavy nucleus along with the huge amount of energy. This reaction takes place in the Sun.
Explanation:(a) Was this an observational study or an experiment? Explain your reasoning. Experiment, because certain variables were controlled (he sets the screen brightness to low and then starts a movie) to determine if iPhones last longer if the screen brightness is set to low, and it proves the cause and effect relationship.
(b) What is the explanatory variable and the response variable? Response Variable- To determine if iPhones last longer if the screen brightness is set to low Explanatory variable- he sets the screen brightness of 10 of the iPhones to high and starts a movie, then the other 10 to low and starts a movie.
(c) Was a random sample used to collect the data? Yes- “he selects a random sample of 20 brand new iPhones”
The properties of distribution include concentration and density, and jobs influence the distribution of population.
- Population refers to the number of people that are living in a particular area. It should be noted that the main properties of distribution include pattern, concentration, and density.
- Also, it should be noted that jobs influence the distribution of the population. When people realize that they can get job opportunities in a particular place, they move to that place. This is the main reason that people move from the villages to the cities.
In conclusion, the correct options are E and A.
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The concept of continuity relates to historical developments and processes because historians can link the happenings in the past to recent occurrences.
- The concept of continuity simply explains the continuation of a cycle and it shows the connection that exists between historical events.
- Changes take place at different times which are then linked forward and backward in time. Continuity refers to the continuance of themes.
- The concept of continuity is vital as historians are able to link what has occurred earlier to the recent things that are happening. For example, Islam had an influence on African culture and its development.
In conclusion, continuity is important to historians.
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