Na teoria da relatividade restrita, um observador que se move com velocidade v em relação a outro dito em repouso, observa um evento com duração temporal de T₀, enquanto o observador em repouso observa este mesmo evento com duração temporal de T. Ambas as durações estão ligadas pela expressão:



Onde c é a velocidade da luz. Com base na expressão dada, é correto afirmar que:

No estudo das propriedades de materiais, é muito comum se utilizar uma grandeza chamada de superfície específica. Ela pode ser definida como a razão entre a área superficial total de um material e a sua massa. Suponha que a superfície específica de um determinado material em pó é dada por 6000 cm² /g. Esse valor expresso em m² /kg é:

Considere um polígono convexo de N lados, não necessariamente regular. Considere também as seguintes afirmativas:

I – A soma dos ângulos internos é sempre igual a 180° ⋅ (N − 2);
II – A soma dos ângulos externos é sempre igual a 360°;
III – Todos os ângulos internos são iguais entre si;

Estão corretas:

“I wish it need not have happened in my time," said Frodo. "So do I," said Gandalf, "and so do all who live to see such times. But that is not for them to decide. All we have to decide is what to do with the time that is given us.”

― J.R.R. Tolkien, The Fellowship of the Ring

Based on the premise in the dialogue between Frodo and Gandalf in J.R.R. Tolkien's "The Fellowship of the Ring", which of the following best describes the moral lesson conveyed?

Select the option that completes the dialogue with appropriate vocabulary and syntax:

A: "Could you explain the difference between 'effect' and 'affect'?"
B: "Certainly. ___________ is usually a noun, meaning the result of something, while ___________is a verb meaning to influence something. For example, 'The drug has no known side __________.'

In the realm of educational psychology, consider the following statements about learning theories.

I. Constructivism posits that learners construct their own understanding and knowledge of the world, through experiencing things and reflecting on those experiences.
II. Behaviorism asserts that learning is largely invisible, focusing on internal thought processes, and emphasizes how students think and feel about the learning process.
III. Social Learning Theory suggests that people learn from one another, via observation, imitation, and modeling.

Which of the statements above is(are) correctly described?

Identify the sentence that correctly uses a third conditional structure, which is used to talk about impossible past situations and their hypothetical results.

Available at: https://www.gocomics.com/bc/2019/04/10

What does the use of the word "likely" in the phrase "and likely kill us all" suggest about the event's certainty?

Available at: https://www.gocomics.com/bc/2005/10/18

The comic strip presents a humorous misunderstanding based on the phrase "beer belly". What does the phrasal verb "get rid of" mean in this context?

Available at: https://www.gocomics.com/peanuts/1994/06/11

Identify the correct past participle form of the verb used in the second panel "tore up":