The extent to which special relativity may be used to simulate gravity is investigated in this paper using a theoretical approach, where the “gravitational” time dilation calculated using the two methods are compared. The method was to establish, with reference to their co-moving rest frame, two uniformly accelerating observers that are stationary with respect to one another. The time dilation experienced by these two observers in special relativity is then analytically and numerically compared to that derived by general relativity, if the same observers were taken to be at rest in a uniform gravitational field. The special relativity formula was shown to have an accuracy of 9.11 percent, and that the two formulas have matching behaviours up to the sub-leading order of their expansions. The accuracy was also shown to decrease when distance increases, demonstrating that this method is only valid for simulating gravity on a local scale. The results therefore agree with predictions; according to the equivalence principle, the accelerated frame is equivalent to a gravitational field only on a local scale where spacetime can be seen as locally flat and the gravitational field as approximately uniform.

After the publication of Special Theory of Relativity in 1905, scientists raised questions that seemed to be impossible to explain due to relativity. These paradoxes seem to make contradictory statements and challenge the legitimacy of the theory of relativity until it was accepted by the scientific community.  This `paper presents some of those paradoxes and findings of Special Theory of Relativity, namely the Bug Rivet Paradox, Bell’s Spaceship Paradox and the changes in the electromagnetic fields due to a change in frames of reference. The paper shows how these problems were solved using coordinate transformations, and the key insights into the world we live in, such as the explanations of why electric and magnetic fields are interlinked.

Physicists came up with apparent paradoxes which challenged the theory. Apparent paradoxes arise due to two statements that seem logical but do not agree with each other, or an antinomy. We will be looking at some of these problems; Bug-Rivet paradox, Bell’s Spaceship paradox and the link between electric and magnetic fields.

Everyone has the right to have access and afford healthy food, to be able to afford a healthy diet, but there are many challenges in meeting this social need. A healthy diet brings beneficial effects to the human body, decreasing the possibility of developing disease, and raises the general health level of a community. However, this depends on the availability of nutritious, affordable, accessible healthy food.
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In this paper, we explore factors affecting the accessibility of healthy food, through the lens of availability and affordability. This will be conducted by drawing on research on nutrition and public health economics to explore the impact of geography on availability and price of healthy food. There will be a brief review of the impact that culture has had on the historical circumstances for the development of healthy or unhealthy eating habits. The study will question whether recent developments with regards to availability and price of healthy food have served as barriers to healthy eating patterns, which may have restricted New Zealanders’ choices of healthy eating, decreasing the public health level.

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As approximately 5–35% of college students commonly use methylphenidate (MPD) as a cognitive enhancer, non-medical use is an area of concern. Young adults may underestimate the harm involved with non-medical use. This review examines potential benefits, harm, and dispositional factors involved in non-medical use of methylphenidate among young adults.

Nowadays, adolescents’ mental health issues are becoming more and more severe. In Japan, a survey carried out in 2021 showed that about 10% of 11-12 year-old students and about 20% of 13-15 year-old students were in a state of depression. Globally, it is estimated that 1 in 7 of 10-19 year-olds experience mental health issues. However, because mental health is prone to countless factors, many of those who have mental health issues remain untreated.

Studies report that most mental disorders manifest before age 25, typically during the pre-teen and teenage years. Given that adolescents spend the greatest portion of their lives at school during this period, research should focus on the promotion of adolescents’ mental wellbeing within the school environment.

A study regarding the relations between school climate and adolescents’ mental health showed that the students’ mental state varied among individuals rather than between schools. Other research indicates that students’ perceived connection to social relations, teacher-student relations, and commitment to school are associated with better mental health. Considering these results together, I seek to highlight the importance of building good interpersonal relationships for students’ mental health.

The space flight industry is growing rapidly. In order to increase its efficiency and reduce harmful impact as the industry continues to expand and cause more influence, the present study investigates and compares a set of rocket propellants in order to determine the most and least advantageous ones to use currently and going forward. Chemical properties, production and storage cost, and environmental impact were all considered.

It is hypothesized that the propellants likely to perform best in comparison are those which are currently used the most in terms of launch frequency, i.e. RP-1 (kerosene) and hydrazine. To compare various properties, three novel equations are derived, providing numerical, objectively comparable values for each considered fuel in terms of its economic, environmental, and efficiency potential. Results show ADN based propellants, Al/Ice and liquid methane as the most optimal, with hydrazine, liquid hydrogen, and NTP (nuclear thermal propulsion) being the least optimal, out of the 9 fuels shortlisted and compared.

In conclusion, the initial hypothesis was challenged, leading to the recommendation that further research for potential implementation of specific novel and less-used fuels should be pursued as a priority, to ensure a sustainable future for the space industry and the planet as a whole.