Sound of the stone striking
A spelunker (cave explorer) drops a stone from rest into a hole. The speed of sound is 343 m/s in air, and the sound of the stone striking the bottom is heard 1.50 s after the stone is dropped. How deep is the hole?
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A circular surface with a radius of 0.067 m is exposed to a uniform electric field of magnitude 1.92 x 104 N/C. The electric flux through the surface is 56 N·m2/C. What is the angle between the direction of the electric field and the normal
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A woman rides a carnival Ferris wheel at radius 16 m, completing 4.4 turns about its horizontal axis every minute. What are (a) the period of the motion, and the magnitude of her centripetal acceleration at (b) the highest point and (c) the lowest
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