A wooden block with mass 1.75 kg is placed against a compres…
A wooden block with mass 1.75 kg is placed against a compressed spring at the bottom of a slope inclined at an angle of 28.0° (point A). When the spring is released, it projects the block up the incline. At point B, a distance of 7.90 m along the incline from A, the block is moving up the incline at a speed of 6.10 m/s and is no longer in contact with the spring. The coefficient of kinetic friction between the block and incline is μk = 0.450. If the spring constant of the spring used is 40 000 N/m, what was the compression of the spring at the bottom of the incline, in meters? Use energy methods to solve this problem.
Read DetailsThe real risk free rate is 2.5% and the default risk premium…
The real risk free rate is 2.5% and the default risk premium is 3%. If the inflation level is 2.5% in the first year, 3.5% in the second year and 4.5% in the third year, the approximate nominal rate on a three-year Federal Government bond is
Read DetailsIn 1999 the army of country Z started to collect data from a…
In 1999 the army of country Z started to collect data from all their recruits. As part of the process, they conducted a full physical examination in which audition was measured and reported as normal hearing, low hearing loss, and severe hearing loss. Unfortunately, 5 years later country Z went into a war with country Y. In 2018 a researcher from University U decided to conduct a study in which she investigated the association between hearing loss and suffering a war injury. What type of study design is being illustrated in this example?
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