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A radio receiver can detect signals with electric field amplitudes as small as 250?V/m.
What is the intensity of the smallest detectable signal?
One mole of a dilute gas initially has a pressure equal to 1.00 atm, and a volume equal to 23.0 L and an internal energy of 3.49 kJ. Find the heat absorbed by the gas
Suppose an electric eel touches the head and tail of a long, approximately cylindrically shaped fish and applies a voltage of 600V across it. estimate the overall resistance of the fish
Evaluate how much work is done (including the algebraic sign) if the gas then expands from 4.0 10-3 to 6.0 10-3 m3 under isobaric conditions?
How much work done against force of gravity
The nonconservative wind and lift forces take the balloon up, doing +9.70 104 J of work on the balloon in the process. Illustrate at what height above the surface of the earth does the balloon have a speed of 8.90 m/s?
A nonreflective coating (n = 1.31) covers the glass (n = 1.52) of a camera lens. determine the minimum nonzero thickness that the coating can have
A chair of weight 70 lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of = 37.0 directed at the angle of 42 below the horizontal and the chair slides along the floor.
A uniform plank of length 5.70 m and weight 215 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support. To what distance x can a person who weighs 452 N walk on the overhanging part of the plank before it just be..
Two loudspeakers are placed next to each other and driven by the same source at a frequency of 570Hz. A listener is in front of the speakers and on the line separating them.
A baseball has a velocity of 41.5 m/s (92.8 mi/h), directed horizontally, as it is released by a pitcher. Calculate the ball's instantaneous acceleration just before it is released
A spool whose inner core has a radius of 1.00 cm and whose end caps have a radius of 1.50 cm has a tightly wound inner core. what is the angular speed of the spool
A spherical steel ball bearing has a diameter of 2.54 cm at 22 degrees. what is the diameter as its termperature is raised at 88 degrees celcuis.
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