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
Light is incident upon the the surface of water in a level, flat-bottomed glass dish at an angle of 50 degrees to the normal. At What angle will the light emerge from the bottom of the dish? The refractive indices of water and glass are 1.33 and 1
A planet of mass 7 × 1024 kg is at location ‹ -5 × 1011, 7 × 1011, 0 › m. A star of mass 8 × 1030 kg is at location ‹ 4 × 1011, -5 × 1011, 0 › m. What is the force exerted on the plan
Drawing on Eratosthenes method, if two observers are due north and south of each other and are separated by 400 km, what is the circumference of their spherical world if they see the same star on their meridian at altitudes of 23 degrees and 47 de
An infinite line of charge has linear charge density 5.50 10-12 C/m. A proton (mass 1.67 10-27 kg, charge +1.60 10-19 C) is 18.0 cm from the line and moving directly toward the line at 1.20 103 m/s. How close does the proton get to the line of cha
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
A handball of mass 300 g is thrown straight against a wall with a speed of 8 m/s. It rebounds with the same speed. (a) What impulse is delivered to the wall?
A sled is pulled with a horizontal force of 17 N along a level trail, and the acceleration is found to be 0.36 m/s2. An extra mass m = 4.4 kg is placed on the sled. If the same force is just barely able to keep the sled moving, what is the coeffi
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