1) when equal masses of hot water and oil at the same temperature are allowed to cool water cools slower than oil . why? 2) describe the structure and function of a maximum minimum thermometer .
3) what is the effect on the molecules of matter when the temperature is varied ?
4) "the sun is regarded as the main source of energy". justify .
5) why is the development and use of alternative energy source necessary in today's world ?
6) why coal is called the fossil fuel ?
7) write the differences between pressure and upthrust .
8) how does a hot air balloon rise up ?
9) explain the roles of piston valve of a water pump .
10) we experience nose bleeding while checking to higher altitude. why ?

those who will ans all these question i will mark brailiest
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Ahypothesis is? close agreement by competent observers of observations of the same phenomena. a guess that has been tested over and over again and always found to be true. an educated guess that has yet to be proven by experiment. the long side of a right triangle. a synthesis of a large collection of information that includes guesses.

While studying chemical reactions and conservation of matter, sarah's class conducted a variety of experiments. sarah and her lab partner found the mass of a wax candle and placed the candle in a flask. the students lit the candle and let it burn to completion. all that was left was wax and charred candle wick. per their teacher's instructions, the students found the mass of the products. their data can be seen in the data table. formulate a hypothesis the students could test to explain why the experiment did not support the law of conservation of matter. a) the students could repeat the experiment using different candles; there might have been a flaw in the candle. b) the experiment should be repeatable. the students should run several trials and then take an average of the after mass in each trial. c) the students should have someone in the class check their measurement skills as they repeat the experiment. they may have made an error using the balance. d) the students should burn the candle in a container that has some type of lid so that any gas that is a product of the reaction can be contained and massed. submit

If the textbook weighs 19.6 newtons on venus,what is the strength of gravity on venus?