Physics, 02.09.2019 13:00, shelbiec5355

The universe is expanding, all light from all galaxies is redshifted. true false

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The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

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Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

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Physics, 22.06.2019 10:10, xavierfox1721

In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. what should be the radius of curvature of the cornea such that the image of an object 40.0 cm from the cornea’s vertex is focused on the retina?

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Physics, 22.06.2019 18:50, rurbanok12

8.29 two streams containing pyridine and acetic acid at 25°c are mixed and fed into a heat exchanger. due to the heat-of-mixing effect, it is desired to reduce the temperature after mixing to 25°c using a stream of chilled ethylene glycol as indicated in the diagram. calculate the mass flow rate of ethylene glycol needed. the heat capacity of ethylene glycol at these conditions is approximately 2.8 kj/(kg k), and the enthalpy change of mixing (δmixh) is given below.

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The universe is expanding, all light from all galaxies is redshifted. true false...