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A 1700 Hz siren and a civil defense official are both at rest with respect to the ground. What frequency does the official hear if the wind is blowing at 12.0 m/s(a) from source to official and (b) from official to source?
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 1.20×10^6N , one at an angle 17.0 degrees west of north, What is the total work done by the two tugboats on the supertanker
Determine the force required to push a 1000kg stoneblock up the side of the pyramid along a ramp. The ramp has anangle of 40 degrees and a coefficient of friction of 0.1 (thisrepresents a relatively slippery surface because you sprinkled lots of ..
The free-fall acceleration on the surface of Neptune is about one and one half times that on the surface of the Earth. Find the ratio of their average densities
An atom by a single electron (i.e. a hydrogen-like atom) has anatomic number Z = 3. What is the principal quantum number of the state in which the electron has the similar total energy as aground state electron has in the hydrogen atom?
In the figure the four particles form a square of edge length a = 7.40 cm and have charges q1 = 9.32 nC, q2 = -21.0 nC, q3 = 21.0 nC, and q4 = -9.32 nC. What is the magnitude of the net electric field produced with the particles at the square's cente..
You measure the length of the same side of a block five times and find: b=12.0, 11.7, 12.2, 11.9 and 11.8 mm. What is the best estimate for the uncertainty in b? The amount of average 11.92 is wrong.
A ship sets sail from Rotterdam, The Netherlands, heading due north at 5.00 m/s relative to the water. What is the velocity of the ship
Where does the bare (5) come from, in the spring equation. I know where the .5 comes from (1/2), I know where the 1.2 comes from (Spring force), I know where the .05 comes from (5 CM, right?) -- so where does the 5 come from, and why isn't the .05 cm..
You are driving along SW 8th Street (Tamiami Trail). It takes you 6.8 minutes from 107th Avenue to 92th Avenue. What was your average velocity
A pigeon flying horizontally at a speed of 16.0m/s drops a stolen Rolex watch. The timepiece falls to the ground in 2.90s. (a) what was the watch's altitude when it was dropped? (b) how far horizontally did it travel before it smashed into the deck?
Suppose that the dipole moment associated with an iron atom of an iron bar is 2.4 x 10-23 J/T. What is the dipole moment of the bar
the normal human eye has maximum visual acuity with a pupil size of about 3 mm. for larger pupils acuity decreases due
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