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The intensity of an earthquake wave passing through the Earth is measured to be 1.5×106J/m^2\cdot s at a distance of 55km from the source. What was its intensity when it passed a point only 1.0km from the source? express answer in two significant figures. At what rate did energy pass through an area of 3.0m^2 at 1.0km ?Express answer in two significant figures.
A man weighing 720 N lies on a bed of nails. Calculate the pressure exerted on the skin by an acupuncture needle of radius 0.100 mm applied with a force of 5.20 N
A loudspeaker of mass 19.00 is suspended the distance of = 1.80 below the ceiling by two cables that make equal angles with the ceiling. Each cable has the length of = 3.50. What is the tension in each of the cables.
A 15kg crate is moved along a horizontal floor by pulling on it with a rope that makes a 30 degree angle with the horizontal. The tension in the rope is 200N and the crate slides a distance of 10m.
A bead slides without friction around a loop- the-loop. The bead is released from a height of 24.7 m from the bottom of the loop-the- loop which has a radius 9 m.
The first skater carries a 2-m pole that may be considered massless. As he passes the pole, What is the angular speed after the skaters are linked together
A 0.200-kg block along a horizontal track has a speed of 1.40 m/s, What is the spring's maximum compression if the track is frictionless
A radio tuner is built by connecting an L=0.48mH inductor and variable capacitor in series with an antenna. What is the quality factor of the circuit with the capacitance you found
a solid, uniform sphere (r=20 cm, density= 850 kg/m cubed) is attached by a massless cable to the ceiling of a room, find the apparent weight (the reading on the scale) when the cable tension is
question1a certain elevator cab in a new york hotel has a total run of 178 m. its greatest speed is 251 mmin. its
a block of wood of mass m1= 1 kg slides to the right on a frictionless horizontal table with a speed of 30 m/s. how much is the spring compressed by the wood
A scientific instrument that weighs 78.4 on the earth weighs 29.7 at the surface of Mercury. What is the acceleration due to gravity on Mercury
How far apart would the two sphere. Uranium-238 (U238) has three more neutrons than uranium-235 (U235). Compared to the speed of sound in a bar of U235, is the speed of sound in a bar of U238 higher, lower, or the same? There are several factors ..
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