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Government limits for sea water are based on an iodine 131 value of 40 Bq/L and a cesium 137 value of 90 Bq/L. On April 17, 2011, sea water contamination levels based on samples 20 km from the site had iodine 131 and cesium 137 concentrations of 161 Bq/L and 186 Bq/L, respectively. How much time must pass before the sea water sample reaches the government's limits?
A freight train has a mass of 1.7 × 107 kg. How long does it take (in MINUTES) to increase the speed of the train from rest to 64 km/h
A bullet is fired vertically into a 1.3kg block of wood at rest directly above it. If the bullet has a mass of 29g and a speed of 470m/s, how high will the block rise after bullet becomes embedded in it.
A solid sphere (I = 2MR2/5) rolls without slipping down a plane inclined at 29?relative to horizontal. What type offriction acts and what is the coefficient of friction? The answers are rounded to two significant digits
Where can a third charge be placed. To what common temperature must the two pieces be heated in order that the cylinder just fit over the piston.
a) Use conservative of energy to find the car's speed at the top of the loop and at the bottom of the loop. b) what is the centripetal acceleration ar=V^2/r at the top of the loop and bottom of the loop
A hydrogen atom initially in its ground state (n = 1)absorbs a photon and ends up in the state for which n = 3. What is the energy of the absorbed photon
the electric potential at point b in the parallel plate capacitor is less than the electric potential at point a by
A particle with a mass of 2.0×105kg and a charge of +2.9C is released in a (parallel plate) uniform horizontal electric field of 15N/C. How far horizontally does the particle travel in 0.40s? What is the horizontal component of its velocity at that p..
a woman with a mass of m1 is standing on the rim of a large disk that is rotating at an angular velocity of ? about an
You are using the 10 cc syringe and the 50 cc syringe. The masses of the 10 cc piston and 50 cc piston are 15.2 g and 60.6 g, respectively. What is the predicted slope
in fair weather over flat ground there may be a downward electric field of 155 nc. a assume that the earth is a
a singly ionized nickel atom has an overall charge of 1e where e 1.602 x 10-19 c and a mass m 9.80 x 10-26 kg. it
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