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A boat has a mass of 6800kg. Its engines generate a drive force of 3750N, due west, while the wind exerts a force of 790N, due east, and the water exerts a resistive force of 1200N due east. What is the magnitude and direction of the boat's acceleration?
a pendulum is made with a 4 kg mass suspended at the end of a 75 cm thin rod. the pendulum started at an angle of 20
A system does 112 J of work on its environment and gains 72 J of heat in the process. What is the change in the internal energy of the environment
Review Conceptual Example 5 before attempting this problem. Asthe drawing shows, the length of a guitar string is 0.601 m. Thefrets are numbered for convenience. A performer can play a musicalscale on a single string because the spacing between thefr..
A television station broadcast on a frequency of 89 MHz. Whatis the wavelength of the electromagnetic wave?(m) What is the length of the antenna
The flow rate of blood through the average human aorta, of radius 1.0 cm, is about 90 cm^3/s. What is the speed of the blood flow through the aorta
a boy on a roof throws one ball downward and an identical ball upward. the ball thrown downward hits the ground with 100 J of kinetic energy. what is the kinetic energy of the second just before it hits the ground
Resistivity measurements on the leaves of corn plants are a good way to assess stress and overall health. What is the resistivity of the leaf tissue
Two point charges Q1 = +4.30 nC and Q2 = -2.30 nC are separated by 27.0 cm. What is the potential energy of the pair of charges
the index of refraction for violet light in silica flint glass is 1.66 and that for red light is 1.62. what is the
the dielectric strength, n, of a material is the largest electric filed it can be subjected to without breaking down, or in other words, What is the capacitance of this capacitor
The concept of thermionic emission is the basis of modern X-ray tubes, which are the workhorse of a medical X-ray image. In this process a filament (a piece of metal in a vacuum) is heated by the application of electrical current
An electromagnetic velocity filter (sometimes called a Wien filter) is used in a variety of experiments and other applications, such as electron microscopes, in which we need a beam of charged particles all going at the same speed. Generally the s..
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