Observation: it is mid-summer and i go away for a holiday for two weeks. before i go, i water my vegetable garden
one last time and notice that everything is green and healthy. when i get back from my holiday, i notice that all the
vegetables have gone brown and are dead.
inferences: you havent watered it in awhile.
problem #6
observation: i am in the lab timing how long it takes to boil 100 ml of water in a beaker over a bunsen burner. i
observe it takes 5: 15 mins to boil the water. i want to get the most accurate answer possible so i repeat the test
again making sure everything is the same. this time it takes 7: 05 mins to boil the water. i think this is unusual so i
repeat the experiment a third time and it takes 5: 20 mins.
what could we infer about the differences in the times observed?
problem #7
someone hurry up and answer quickly plz? ?

The frequency of vibrations of a vibrating violin string is given by f = 1 2l t ρ where l is the length of the string, t is its tension, and ρ is its linear density.† (a) find the rate of change of the frequency with respect to the following. (i) the length (when t and ρ are constant) (ii) the tension (when l and ρ are constant) (iii) the linear density (when l and t are constant) (b) the pitch of a note (how high or low the note sounds) is determined by the frequency f. (the higher the frequency, the higher the pitch.) use the signs of the derivatives in part (a) to determine what happens to the pitch of a note for the following. (i) when the effective length of a string is decreased by placing a finger on the string so a shorter portion of the string vibrates df dl 0 and l is ⇒ f is ⇒ (ii) when the tension is increased by turning a tuning peg df dt 0 and t is ⇒ f is ⇒ (iii) when the linear density is increased by switching to another string df dρ 0 and ρ is ⇒ f is ⇒

Which one of the following research methods can show cause and effect

If 2 moles of co_2 at 2l and 500k are expanded reversibly to 20l, more work can be obtained from an adiabatic process than from an isothermal process. is the above statement true or false?