Professional Courses
Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.
Categories
Interactive Games
Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
Typing
Memory
Math
English Adventures
Knowledge
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What causes sound?
💡 Hint: Think about what happens when you hit a drum.
Question 2
Easy
What is a medium?
💡 Hint: Identify the states of matter where sound can travel.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the speed of sound in air at 20 ºC?
- 344 m/s
- 331 m/s
- 346 m/s
💡 Hint: Consider the distance covered by sound in air at room temperature.
Question 2
True or False: Sound can travel through a vacuum.
- True
- False
💡 Hint: Remember what happens in outer space.
Solve 3 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Calculate the frequency of a sound wave that has a speed of 340 m/s and a wavelength of 1.5 m.
💡 Hint: Use the formula related to sound wave properties.
Question 2
If a person hears an echo 2 seconds after shouting, what is the minimum distance to the reflecting surface?
💡 Hint: Remember the formula for distance and the significance of echo timing.
Challenge and get performance evaluation