STEM Concepts Flashcards

A wave traveling in a medium has a frequency of 440 Hz and a wavelength of 0.75 m. What is its wave speed?

Answer: 330 m/s

Wave speed = frequency × wavelength = 440 × 0.75 = 330 m/s.

In a chemical reaction, if the activation energy is lowered by a catalyst, what happens to the reaction rate?

Answer: It increases

A catalyst lowers activation energy, allowing more molecules to overcome the energy barrier and increasing the reaction rate.

Which data structure operates on a Last-In, First-Out (LIFO) principle?

Answer: Stack

A stack is a LIFO structure where the most recently added element is the first to be removed.

The Pythagorean theorem states that in a right triangle with legs a and b and hypotenuse c, which equation holds?

Answer: a² + b² = c²

The Pythagorean theorem is a² + b² = c², relating the squares of the legs to the square of the hypotenuse.

What is the primary function of mitochondria in a eukaryotic cell?

Answer: Produce ATP through cellular respiration

Mitochondria generate ATP via oxidative phosphorylation, earning the title 'powerhouse of the cell.'

In computing, what does 'binary' refer to?

Answer: A base-2 number system using only 0 and 1

Binary is a base-2 numeral system that uses only the digits 0 and 1, which directly maps to electronic on/off states.

Which property of matter describes its resistance to changes in motion?

Answer: Inertia

Inertia is the tendency of an object to resist changes in its state of motion, as described by Newton's First Law.