In general knowledge terms, which wave requires a material medium to travel?

✅ D. Energy

The joule is the SI unit of energy and work. Read more

✅ D. Voltmeter

A voltmeter measures potential difference. Read more

✅ B. 9.8 m/s²

Near Earth's surface, gravitational acceleration is approximately 9.8 m/s². Read more

✅ B. Ohm

Electrical resistance is measured in ohms. Read more

✅ D. Refraction

Refraction is the change in direction of light due to a change in speed between media. Read more

✅ B. Convex lens

A convex lens is thicker at the center and converges parallel light rays. Read more

✅ D. 9.8 m/s²

Near Earth's surface, gravitational acceleration is approximately 9.8 m/s². Read more

✅ B. 343