Physics, 31.07.2019 16:50 cheetah810
One student did an experiment with salt water. the steps of the experiment are shown below. pour half a cup of salt water into a pan. keep the pan outside in the sun for a day. allow all the water in the pan to evaporate. observe a white residue at the bottom of the pan. the student's experiment demonstrates that when water evaporates, it a. changes into solid minerals b. leaves solid minerals behind c. turns solid minerals into powder d. converts gases into solid minerals
Answers: 2
Physics, 22.06.2019 10:10
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?
Answers: 1
Physics, 22.06.2019 12:00
Selma made a diagram to compare convection and radiation. which label belongs in the area marked x? must involve temperature differences between substances or objects only occurs when molecules are in direct contact involves the movement of fluids based on density differences can occur where there is little or no matter
Answers: 1
Physics, 22.06.2019 14:40
Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?
Answers: 1
Physics, 22.06.2019 15:20
A20 cm long spring is attached to a wall. the spring stretches to a length of 22 cm when you pull on it with a force of 100 n. what is the spring constant
Answers: 3
One student did an experiment with salt water. the steps of the experiment are shown below. pour ha...
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