Nokea
What is the relationship between the frequency and period of a wave?
- A. They are unrelated
- B. Frequency = Period
- C. Frequency = 1/Period
- D. Period = 1/Frequency
Correct Answer: D
Rationale: The correct relationship between frequency and period of a wave is that Period = 1/Frequency. This relationship indicates that the period of a wave is the reciprocal of its frequency. Frequency refers to the number of complete cycles of a wave occurring in a unit of time, while the period is the time taken for one complete cycle of the wave to occur. As frequency and period are inversely related, the correct formula to express this relationship is Period = 1/Frequency. Choice A is incorrect as frequency and period are related. Choice B is incorrect as frequency and period are not equal. Choice C is incorrect as it suggests that frequency is directly proportional to period, which is not the case.
You may also like to solve these questions
Which biome is characterized by cold temperatures, permafrost, and coniferous trees?
- A. Tundra
- B. Desert
- C. Rainforest
- D. Savanna
Correct Answer: A
Rationale: A) Tundra: This biome is characterized by cold temperatures, permafrost (permanently frozen subsoil), and vegetation such as mosses, lichens, and coniferous trees like spruce and fir. The tundra is found in high latitudes near the Arctic Circle and high altitudes in mountainous regions. It is a cold and harsh environment where the ground remains frozen for a significant part of the year. The coniferous trees in this biome are adapted to survive in extreme cold conditions.
B) Desert: Deserts are characterized by low precipitation levels and high temperatures, with sparse vegetation adapted to arid conditions.
C) Rainforest: Rainforests are characterized by high levels of rainfall, warm temperatures, and dense vegetation with a variety of plant and animal species.
D) Savanna: Savannas are tropical grasslands with scattered trees and shrubs, characterized by a distinct wet and dry season. They have a different climate pattern compared to the cold temperatures and permafrost found in the tundra biome.
In this case, the description of cold temperatures, permafrost, and coniferous trees aligns most closely with the characteristics of the tundra biome, making option A the correct answer.
Imagine you have an element with atomic number 20 and mass number 40. How many neutrons does it have?
- A. 20
- B. 40
- C. 10
- D. 20
Correct Answer: C
Rationale: - The atomic number (Z) represents the number of protons in an atom. In this case, the atomic number is 20.
- The mass number (A) represents the total number of protons and neutrons in an atom. In this case, the mass number is 40.
- To find the number of neutrons, you subtract the atomic number from the mass number: Neutrons = Mass number - Atomic number.
- Neutrons = 40 - 20 = 20.
- Therefore, the element with atomic number 20 and mass number 40 has 20 neutrons.
Which of the following substances is NOT typically found in healthy urine?
- A. Urea
- B. Glucose
- C. Creatinine
- D. Electrolytes
Correct Answer: B
Rationale: Glucose is not typically found in healthy urine because the kidneys usually filter glucose from the blood and reabsorb it back into the bloodstream. The presence of glucose in urine, known as glucosuria, is usually indicative of diabetes or other medical conditions affecting glucose regulation. On the other hand, urea, creatinine, and electrolytes are commonly present in healthy urine as byproducts of metabolism and electrolyte balance. Urea is a waste product of protein metabolism, creatinine is a waste product of muscle metabolism, and electrolytes are essential for various physiological functions in the body. Therefore, choices A, C, and D are typically found in healthy urine, making them incorrect answers.
What is the primary function of the respiratory system?
- A. Maintain body temperature
- B. Deliver oxygen to the bloodstream and remove carbon dioxide
- C. Produce antibodies for the immune system
- D. Break down food molecules for energy
Correct Answer: B
Rationale: The primary function of the respiratory system is to deliver oxygen to the bloodstream and remove carbon dioxide. This process occurs through breathing, where oxygen is inhaled into the lungs and then transferred to the bloodstream, while carbon dioxide is removed from the bloodstream and exhaled out of the body. Maintaining body temperature (A), producing antibodies for the immune system (C), and breaking down food molecules for energy (D) are functions of other systems in the body, not the respiratory system. Therefore, the correct answer is B.
Which of the following is NOT a common symptom of pregnancy?
- A. Fatigue
- B. Nausea
- C. Increased urination
- D. Loss of appetite
Correct Answer: D
Rationale: The correct answer is D, 'Loss of appetite.' Loss of appetite is not a common symptom of pregnancy. In fact, many pregnant individuals experience an increase in appetite due to hormonal changes and increased energy needs during pregnancy. Fatigue, nausea, and increased urination are more commonly reported symptoms during pregnancy. Fatigue is often experienced due to hormonal changes and the body's increased metabolic demands during pregnancy. Nausea, commonly known as morning sickness, is a well-known symptom experienced by many pregnant individuals. Increased urination is a common symptom in pregnancy due to hormonal changes leading to increased blood flow to the kidneys and increased fluid processing by the body.