Select the best answer: Which simple machine is a rigid bar pivoted about a fixed point?

✅ D. Pascal

Pressure is measured in pascals. Read more

✅ D. 3 × 10^8 m/s

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

✅ B. It increases

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

✅ D. 9.8 m/s²

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

✅ B. Newton's third law

Newton's third law describes action and reaction forces. Read more

✅ B. Pascal

Pressure is measured in pascals. Read more

✅ A. Convex lens

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

✅ A. 9.8 m/s²

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