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Physics, 21.06.2019 16:00

The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.

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Physics, 21.06.2019 21:40

Since the investigative question has two variables, you need to focus on each one separately. thinking only about the first part of the question, mass, what might be a hypothesis that would illustrate the relationship between mass and kinetic energy? use the format of "if…then…because…” when writing your hypothesis.

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Physics, 21.06.2019 22:40

Acopper block consisting of 0.5 mole of atoms contains 8000 joules of thermal energy. (a) what is the temperature of the block? (b) the vibrational energy levels in copper have an excitation energy of 0.001 ev. how (c) calculate the entropy of the block by estimating the multiplicity of states due to this (d) a second block copper block of exactly the same size and also containing 8000 joules many units of energy q, are present in the copper block? heat. of energy is placed in contact with the first block. after thrmal equilibrium is obtained the energy in first spontancously increases to 8080 joules while the second block decreases to 7920 joules. estimate the universal decrease in entropy if this occurs. (e) estimate the probability that this will occur. express your result as a power of ten.

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Physics, 22.06.2019 01:10

Aparticle initially moving east with a speed of 20.0 m/s, experiences an acceleration of 3.95 m/s, north for a time of 8.00 s. what was the speed of the particle after this acceleration, in units of m/s? give the answer as a positive number.

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Acylinder contains 27.5 l of oxygen gas at a pressure of 1.8 atm and a temperature of 290 k . part a...

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