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Under what conditions would you use cluster sampling? Explain the differences among cluster sampling, simple random sampling, and stratified random sampling. Under what conditions would you use two-stage cluster sampling? Explain the difference between single-stage and two-stage cluster sampling. What are the limitations of cluster sampling?
A 35.0-m long string has a linear mass density of 0.00850 kg/m and is under a tension of 25.0 N. Find the frequency of the fourth harmonic
A pendulum is made up of a 2.0 kilogram mass suspended on thin aluminum wire. Find the length of the pendulum wire at the equator
The batteries shown in the circuit in the figure (Figure 1) have negligibly small internal resistances. Assume that E = 8.00 V and R = 17.1 Ω . Find the current through the 30.0 Ω resistor.
Two metal plates have an electric field between them. What is the electric potential difference between the plates
Find some research/statistics about media's impact on society. There are many areas to consider, so choose an area you believe has a significant impact. (examples: advertising, movies, television, video games, social media, etc.)Summarize the researc..
A double slit that is illuminated with coherent light of wavelength 644 nanometers produces a pattern of bright and dark fringes on a screen 6 centimeter from the slits. find the distance on the screen between the 4th and the 2nd bright fringes on ..
The 2.0 m stick weighs 6.0 N and is suspended by support cords ateach end. Calculate the support force at the right end of the board
A group of developers wants to invest a chain of fast-food restaurants. In determining potential costs for each facility, they must consider among other expenses, the median monthly electric bill. They decide to sample some fast food restaurants c..
Moon effect. Some people believe that the Moon controls their activities. If the Moon moves from being directly on the opposite side of Earth from you to being directly overhead, by what percentage does (a) the Moon's gravitational pull on you increa..
The upstream and downstream temperatures across a normal shock wave in air are measured and found to be 306.3 and 717.6 K, respectively. - Determine the upstream and downstream Mach numbers and the pressure ratio across the shock wave.
A kid at the junior high cafeteria wants to propel an empty milk carton along a lunch table by hitting it with a 3.0 g spit ball. If he wants the speed of the 40 g carton just after the spit ball hits it to be 0.31 m/s , at what speed should his 3..
When a Newton's ring aparatus is submerged in a liquid the diameterof the 8th dark ring decreases from 2.92 cm to 2.48 cm. What is the refractive index of the liquid?
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