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Sampling the forest. To gather data on a 1200-acre pine forest in Louisiana, the U.S. Forest Service laid a grid of 1410 equally spaced circular plots over a map of the forest. A ground survey visited a sample of 10% of these plots.17
(a) How would you label the plots?
(b) Choose the first 5 plots in an SRS of 141 plots. (If you use Table B, start at line 105.)
two large parallel metal plates are 2.5 cm apart and have charges of equal magnitudes but opposite signs on their
A meteor is falling from space at 1500 m/s coming directly at you. at the meteor what is the frequency and power of this sound
a hobby telescope has an objective lens with a focal length of 76cm and an eyepiece with a focal length of 8.2mm. we
A horizontal force of magnitude 100 N begins to pull directly on block. In unit-vector notation, what are the resulting accelerations of (a) block and (b) slab.
An engine absorbs 1.69 kJ from a hot reservoir at 277 °C and expels 1.24 kJ to a cold reservoir at 27 °C in each cycle. What is the power output of the engine if each cycle lasts 0.298 s
Young David who slew Goliath experimented with slings before tackling the giant. He found that he could revolve a sling of length 0.650 m at the rate of 9.00 rev/s. What is the speed of the stone for each rate of rotation
Coherent light that contains two wavelengths, 660nm and 470nm , What is the distance on the screen between the first-order bright fringe for each wavelength
A jet airliner, moving initially at 330 mi/h to the east, suddenly enters a region where the wind is blowing at 100 mi/h toward the direction 30.0° north of east
You pull downward with a force of 32 N} on a rope that passes over a disk-shaped pulley of mass 1.2 kg and radius 0.07 5m. Find the linear acceleration of the 0.61 kg mass.
An athlete swings a 3.90-kg ball horizontally on the end of a rope. The ball moves in a circle of radius 0.840 m at an angular speed of 0.670 rev/s. What is the tangential speed of the ball
monochromatic light strikes a diffraction grating at normal incidence before illuminating a screen 2.10m away. find the distance between the two second-order maxima
A ladder 7.09 m long leans against the side of a building. If the ladder is inclined at an angle of 79.50° to the horizontal, what is the horizontal distance from the bottom of the ladder to the building.
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