A cord 15.0-m long has a mass of 3.00grams. What is its linear mass density in kilograms/meter? If the tension in the cord were provided by a 2.5-kgmass, how long would the cord be to vibrate with one antinode? Assume f = 120 Hz
a cannon-ball is fired horizontally from the top of a castle wall with the speed of 80m/s. At the same time a cannon-ball is dropped straight down and strikes the ground in 2 seconds. How far from the castle wall does the first cannon-ball land?
A point rotates about the origin in the xy plane at a constant radius of 0.216 m and angular velocity of 7.52 rad/s. As you know, the projections of this point on the x- and y-axes undergo simple harmonic motion. What is the amplitude of this motion?
Using a simply pulley/rope system, a crewman on an Arctic expedition is trying to lower a 6.30 kg crate to the bottom of a steep ravine of height 23.4 meters. The 45.0 kg crewman is being careful to lower the crate at a constant speed of 1.50 m/s. Unfortunately, when the crate reaches a point […]
The isomerization of methyl isocyanide, CH3NC -> CH3CN, follows first-order kinetics. The half-lives were found to be 161 min at 199 degrees celcius and 12.5 min at 230 degrees celcius. Calculate the acivation energy for this reaction.
Ultrasound used in a particular medical imager has frequency 4.8 {MHz} and wavelength 0.31 {mm}. Find (a) the angular frequency, (b) the wave number, and (c) the wave speed.
Discuss economic challenges facing Argentina during the twenty first century 2-3 para graphs
1: Why can changes in volume be used to estimate changes in density?2: Where might errors creep into your observations?3: Why don’t all liquids display a temperature versus density relationship similar to that of water? 4: If a single molecule does not have a temperature, what does temperature measure?5: Why is ice less dense than […]
In the food web of a typical terrestrial ecosystem, where would you expect to find the highest proportion of deuterostomes?
5. A light ray travelling through air has an angle of 39o. The light then enters into another medium at an angle of 28o. a. On the diagram below draw how light travels through the air into the unknown medium. (Use a protractor to help you do the question). b. On the diagram above label which medium is […]
