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You drop a stone into a deep well and hear it hit the bottom 1.80 s later. This is the time it takes for the stone to fall to the bottom of the well, plus the time it takes for the sound of the stone hitting the bottom to reach you. Sound travels about 343 m/s in air. How deep is the well?
A 15 g rifle bullet traveling 190 m/s buries itself in a 3.8 kg pendulum hanging on a 3 m long string, that makes the pendulum swing upward in an arc. Determine the horizontal component of the pendulum's maximum displacement.
The speed of sound in bone is 3500 m/s. How much time does it take the echo of a sound wave to travel from the back of the bone to the front of the bone if the bone is 2.50 cm thick.
Arlene is to walk across a high wire strung horizontally between two buildings 11.0 m apart. The sag in the rope when she is at the midpoint is 10.0°. If her mass is 56.0 kg, what is the tension in the rope at this point.
A wall in a house contains a single window. The window consists of a single pane of glass whose area is 0.11 m2 and whose thickness is 8 mm. Treat the wall as a slab of the insulating material Styrofoam whose area and thickness are 15 m2 and 0.10 ..
There are four coils of wire being used as electromagnets. They all have the equal size and are made up of the same material but have a different number of loops.
The rotational inertia of a collapsing spinning star changes to 1/4 its initial value. What is the ratio of the new rotational kinetic energy to the initial rotational kinetic energy.
A thin 12 cm long solenoid has a total of 490 turns of wire and carries a current of 1.9 A. find the magnitude of the field inside near the center.
A 165 pF capacitor is connected in series with an unknown capacitor, and as a series combination they are connected to a battery with emf of 21.3 V. If the 165 pF capacitor stores 112 pC of charge on its plates, what is the unknown capacitance.
Two spheres with masses m1 = 820 kg and m2 = 830 kg are separated by 0.230 m. What is the net gravitational force from them on a 3.0 kg sphere located 0.161 m from m1 and 0.069 m from m2? Use a + sign if the direction is towards m2 and a - sign if..
An ideal gas is expanded isothermally from 20L to 30L. During thismethod , 6J of energy is expended by the external mechanism that expanded the gas. Which of the statements is correct.
What is the change in entropy for the system. How much force must be applied to climb the hill at the same speed and same air resistance.
A 0.39 kg iron horseshoe that is initially at 745°C is dropped into a bucket containing 24 kg of water at 46°C. What is the final equilibrium temperature? Neglect any heat transfer to or from the surroundings.
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