High frequency for the range of radio frequency electronmagnetic waves between 3 and 30 megahertz (MHz)
Answer:
When the piston is pulled up, air gets sucked into the pump through the inlet. The pump chamber depressurizes as it fills with air. When the piston is forced down, the air becomes compressed and closes the inlet. Then the air flows out from the outlet
Answer:
Heat capacity (C) is the amount of energy needed to raise the temperature of a specific substance by 1 degree Celsius. (A)
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Answer:
a) Epot = 17658 [J]
b) v = 76.72 [m/s]
Explanation:
Potential energy is defined as the product of mass by gravity by height.
where:
Epot = potential energy [J]
m = mass = 6 [kg]
g = gravity acceleration = 9.81 [m/s²]
h = elevation = 300 [m]
Now replacing:
![E_{pot}=6*9.81*300\\E_{pot} = 17658 [J]](https://tex.z-dn.net/?f=E_%7Bpot%7D%3D6%2A9.81%2A300%5C%5CE_%7Bpot%7D%20%3D%2017658%20%5BJ%5D)
b)
The energy is conserved, that is, the potential energy is converted into kinetic energy as the car descends.
where:
v = velocity = 2 [m/s]
![17658 = \frac{1}{2} *6*v^{2} \\v=\sqrt{5886}\\v=76.72 [m/s]](https://tex.z-dn.net/?f=17658%20%3D%20%5Cfrac%7B1%7D%7B2%7D%20%2A6%2Av%5E%7B2%7D%20%5C%5Cv%3D%5Csqrt%7B5886%7D%5C%5Cv%3D76.72%20%5Bm%2Fs%5D)
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Below is the solution:
9.43 m/s
<span>F = -kx </span>
<span>k = 400 N/m </span>
<span>PE= 0.5kx^2 = 0.5mv^2 </span>
<span>solve, v=9.43 m/s</span>
