Chemistry, 25.02.2021 04:10 faithkristi

Carla makes a small cardboard boat and floats it in a tub of water. When she adds a drop of dish soap behind the boat, the boat moves forward. Which statement best explains what happened? The soap increased the viscosity of the water behind the boat, allowing the water in front of the boat to flow more easily. The soap reduced the surface tension behind the boat, causing both water molecules and the boat to be pulled forward. The soap increased the kinetic energy of the water molecules behind the boat, causing both the molecules and the boat to move forward. The soap formed an immiscible layer on the water, causing the soap to spread out and push the boat forward.

Answers: 3

Show answers

Another question on Chemistry

Chemistry, 21.06.2019 22:10

What does a particular point on a line of a phase diagram represent? o a. the maximum temperature a substance can exist at without bonds breaking b. the pressure created by the kinetic energy of molecules at a particular temperature c. the melting point or boiling point of a substance at a specific pressure d. the conditions in which temperature and pressure have equal effects on a substance

Answers: 2

Answer

Chemistry, 22.06.2019 18:00

Hydrogenation reactions, in which h2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. in the simplest case, ethene (c2h4) and h2 form ethane (c2h6). if 140 kj is given off per mole of c2h4 reacting, how much heat (in mj) is released when 12 kg of c2h6 forms?

Answers: 2

Answer

Chemistry, 22.06.2019 18:10

Consider the following reaction at equilibrium: c(s)+h2o(g)⇌co(g)+h2(g) predict whether the reaction will shift left, shift right, or remain unchanged upon each of the following disturbances. a) c is added to the reaction mixture. b) h2ois condensed and removed from the reaction mixture c) co is added to the reaction mixture d) h2 is removed from the reaction mixture.

Answers: 3

Answer

Chemistry, 22.06.2019 21:40

Tooth enamel consists mainly of the mineral calcium hydroxyapatite, ca_10(po_4)_6(oh)_2. trace elements in teeth of archaeological specimens provide anthropologist with clues about diet and diseases of ancient people. students at hamline university measured strontium in enamel from extracted wisdom teeth by atomic absorption spectroscopy. solutions with a constant total volume of 10.0 ml contained 0.726 mg of dissolved tooth enamel plus variable concentrations of added sr. added sr find the concentration of sr in the 10 ml sample solution in parts per billion = ng/ml. find the concentration of sr in tooth enamel in parts per million = mu g/g.

Answers: 2

Answer

You know the right answer?

Carla makes a small cardboard boat and floats it in a tub of water. When she adds a drop of dish soa...

Questions