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An object, shown as the dark circle below, is moving along and emitting sound waves. The sound waves that were emitted by the object at times 1 second (one second ago), 2 seconds, and 3 seconds are shown below.
If the Mach number of the object is equal to unity, which is the correct picture for the sound waves?
What does the conductivity of electrolytic solutions depend on?
A perfectly reflecting flat mirror is uniformly illuminated by light striking it perpendicularly. Calculate the intensity of the light
A 10.0 kg rocket is fired vertically. Its fuel gives ita kinetic energy of 1960J. What additional height will the rocket rise
1. two alpha particles helium nuclei each consisting of two protons and two neutrons have an electrical potential
two small charges with a mass of 1 gram each are connected by 2 cm long insulating rod of negligible mass. Obtain the moment of inertia around the center of mass
A lighthouse that rises h1 = 43.6 ft above the surface of the water sits on a rocky cliff that extends $d$ = 20.0 ft from its base, as shown in the figure below. A sailor on the deck of a ship sights the top of lighthouse at an angle of $theta$ = 29...
the power company charges 10 cents per kilowatt-hour, explain how much will it cost to leave the bulb on for 30 days? Show your work.
When chasing a hare along a flat stretch of ground, greyhound leaps into the air at a speed of 10.0 m/s, at an angle of 31 degree above the horizontal. Determine for how much time is he in the air
A hiker begins a trip by first walking 25.0 km 45.0° south of east from her base camp. On the second day she walks 40.0 km in a direction 60.0°north of east, at which point she discovers a forest ranger's tower.
A constant force of 20 N is applied to an object of mass 7.5 kg at an angle of 22 degrees above the horizontal, how much power was used to move the object
A weight lifter struggles but manages to keep a heavy barbell above his head. Is one force larger than the other or are they equal in magnitude to each other
Find what volume of water is displaced by a submerged 4 kilogram cylinder made of iron? (Iron density =7.86 x 103 kg/m3
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