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A state department of transportation is interested in sampling commuters to determine certain of their characteristics. The department arranges for its field workers to board buses at random as well as stop private vehicles at intersections and ask the commuters to fill out a short questionnaire. Is this method cluster sampling? Explain.
Two Train cars are on a smooth level track. Car 1 has an initial mass of 10,000 kg and an initial speed of 18 m/s. what is the speed and kinetic energy of the connected cars after the collision
What is the width of the central maximum on a screen 2.0 m behind the slit?
The scale of a spring balance reading from 0 to 235rm {N} has a length of 15 rm{cm}. A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.7rm {Hz}. What is the mass of fish? In Kg.
a 1.10m long straight wire has a resistance r 14.0 ohm and is connected to a 3.00v battery. the wire is located in a
A garden hose having an internal diameter of 0.720 in. ( 1.8288 cm ) is connected to a lawn sprinkler that consists merely of an enclosure with 36 holes, at what speed does it leave the sprinkler holes
A 100-W light bulb is turned on. It has an operating voltage of 120 V.
Green light at 532 nm lights a diffraction grating with 800 lines per cm. Diffraction pattern is on screen 7.5m away. Calculate distance between the diffraction peaks on the screen
The distance between a loudspeaker and the left ear of a listener is 1.60 m. compute the time required for sound to travel this distance if the air temperature is 20° C.
A factory worker pushes a 28.0kg crate a distance of 4.8m along a level floor at constant velocity by pushing downward at an angle of 28 below the horizontal. How much work is done by the normal force
q1. a rectangular barge that is 5.00 m long and 3.00 m wide floats in freshwater. when the barge is loaded with cargo
suppose a van de graaff generator builds a negative static charge and a grounded conductor is placed near enough to it
The pressure fluctuation of sound waves at the closed end of a pipe vibrating at resonance is: 1. Minimum 2. 1/2 minimum 3. unchanged 4. maximum 5. 1/2 maximum
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