Calculate speed-thrust and torque of prototype propeller
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Calculate the percent carbon in capsaicin,C18H27NO3, the compound that gives the hot taste to chili peppers ?
The rod is 4 ft long when t = 40 F and there is no comression in the springs(K=1000 LB/in). What is the force in the rod and the change in length when the temperature rises to 160 F?
The x, y, and z components of a magnetic field are Bx = 0.10 T, By = 0.14 T, and Bz = 0.17 T. A 25-cm wire is oriented along the z axis and carries a current of 4.1 A. What is the magnitude of the magnetic force that acts on this wire?
An 80.0 m long brass rod is struck at one end. A person at the other end hears two sounds as a result of two longitudinal waves, one traveling in the metal rod and the other traveling in the air. What is the time inteval between the two sounds?
Calculate the speed, thrust, and torque of the prototype propeller under these conditions, neglecting the effect of viscosity but including density.
If a healthy person is selected at random, what is the probability that the person has a temperature above 99.0 degrees? What is the 95th percentile for the body temperatures of healthy humans?
A skier of mass 72 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull him 70 m up a 30° slope (assumed frictionless) at a constant speed of 2.8 (b) What power must a motor have to perform this task?
What is the approximate sampling distribution for the sample proportion ρ^? What are the mean and standard deviation for this distribution? What is the probability that the sample percentage is greater than 80%?
A 100-W lightbulb connected to a 120-V source experiences a voltage surge that produces 140-V for a moment. By what percentage does its power output increase? Assume its resistance does not change.
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