What physical quantity is measured in Joules?

✅ D. Convex mirror

A: Plane mirror B: Concave mirror C: Parabolic mirror D: Convex mirror Read more

✅ B. 9.8 m/s²

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

✅ D. It increases

For typical metals, electrical resistance increases as temperature rises. Read more

✅ A. Convex lens

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

✅ B. 9.8 m/s^2

A: 8.9 m/s^2 B: 9.8 m/s^2 C: 10.5 m/s^2 D: 11.2 m/s^2 Read more

✅ A. 9.8 m/s^2

A: 9.8 m/s^2 B: 8.9 m/s^2 C: 10.5 m/s^2 D: 11.2 m/s^2 Read more

✅ C. 3 × 10^8 m/s

Light travels in vacuum at approximately 3 × 10^8 meters per second. Read more

✅ D. Elastic potential energy

A stretched spring stores elastic potential energy. Read more