Physics, 30.12.2019 22:31 jalenyork6835
Asign is supported by a uniform horizontal boom of length 3.30 m and weight 78.0 n. a cable, inclined at an angle of 23° with the boom, is attached at a distance of 2.44 m from the hinge at the wall. the weight of the sign is 136.0 n. what is the tension in the cable and what are the horizontal and vertical forces fx and fy exerted on the boom by the hinge? comment on the magnitude of fy.
Answers: 2
Physics, 22.06.2019 16:50
Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.
Answers: 1
Physics, 22.06.2019 22:30
Materials will have different energies associated with the electrons inside them. this is related to how strongly bound they are by their work function. if we sandwich a material with a very low energy between two materials with a high energy, we create a trap for an electron. if this trap is very narrow in one direction in comparison to the others, this is approximately a 1-dimensional box that confines the electron. what is the lowest energy of an electron in the box if the thinnest direction across the materials is 4.81 nm?
Answers: 3
Asign is supported by a uniform horizontal boom of length 3.30 m and weight 78.0 n. a cable, incline...
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