Students heat water in a beaker and measure its temperature The starting temperature of the water was 23.3 °C. the diagram shows its final temperature. what type of energy transfer occurred within the water? A. thermal energy from water at the top of the beaker was transferred to water at the bottom.

B. thermal energy from water at the bottom of the beaker was transferred to water at the top.

C. Thermal energy from water at the top and bottom of the beaker was transferred to water in the middle.

D. Thermal energy from water at the top and in the middle of the beaker was transferred to water at the bottom.
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Imagine that you’re getting ready to move to a new city. when people move, they are influenced by push factors and pull factors, and you have many reasons for your move. which of the following factors is an example of a pull factor? a. wanting to move because you’ve found a great new school somewhere new b. needing to move because there are not enough resources in your old hometown c. being forced to move because your old home is gone d. having to move because there are no jobs in your current hometown

1. suppose a reaction mixture, when diluted with water, afforded 300 ml of an aqueous solution of 30 g of the reaction product malononitrile [ch2(cn)2], which is to be isolated by extraction with ether. the solubility of malononitrile in ether at room temperature is 20.0 g/100 ml, and in water is 13.3 g/100 ml. what weight of malononitrile would be recovered by extraction with (a) three 100-ml portions of ether and (b) one 300-ml portion of ether? suggestion: for each extraction, let x equal the weight extracted into the ether layer. in part (a), the concentration in the ether layer is x/100 and in the water layer is (30 x)/300; the ratio of these quantities is equal to k 20/13.3.

Long term exposure to waves can cause sunburns and skin cancer. a) visible b) infrared c) gamma rays d) ultraviole