Physics, 16.10.2020 06:01 heids17043
En un experimento de laboratorio, se utiliza un calorĂmetro para determinar el calor especifico del hierro. Se colocan 80 g de balines de hierro seco en la taza y se calienta a 95°C. La masa de la taza interior de aluminio con un agitador del mismo material es de 60 g. El calorĂmetro se llena parcialmente con 150 g de agua a 18°C. Los balines calientes se vacĂan rĂĄpidamente en la taza y se sella el calorĂmetro, como muestra la figura 17.5. DespuĂ©s que el sistema ha alcanzado el equilibrio tĂ©rmico, la temperatura final es 22°C. Calcule el calor especifico del hierro.
Answers: 2
Physics, 22.06.2019 00:20
Suppose that an electromagnetic wave which is linearly polarized along the xâaxis is propagating in vacuum along the zâaxis. the wave is incident on a conductor which is placed at z > 0 region of the space. the conductor has conductivity Ï, magnetic permeability ” and electric permittivity Δ. (a) find the characteristic time for the free charge density which dissipates at the conductor. (b) write the maxwell equations and derive the wave equation for a plane wave propagating in a conductor. (c) find the attenuation distance at which the incident amplitude reduces to e ^â1 of its initial value. (d) find the electric and magnetic fields inside the conductor. 8 (e) find the power loss per area of the incident electromagnetic wave at the surface of conductor.
Answers: 1
Physics, 22.06.2019 08:30
Does anyone know how to solve this problem? i really need . i made an attempt but i just cant get it. a metal rod is 25.000 cm long at 25.0 degrees celsius. when heated to 102.0 degrees celsius, it is 25.054 cm long. what is the coefficient of linear expansion for this metal.
Answers: 3
Physics, 22.06.2019 11:50
Question 1 (5 pts): what is the maximum distance for which you can you resolve the two individual headlights of an on-coming truck as two separate lights rather than one if the headlights are separated by 2.00 m and your eye has a diameter of 1.00 centimeter? assume a wavelength of 500 nm.
Answers: 2
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