4- Imagine que, em seu município, exista um relógio de sol (gnomon) muda, dependendo da hora do dia claro e da Época do ano, responda. a- como ela varia ao longo de um dia?em que momentos ela é menor e maior? b- como ela varia ao longo de um ano? Em que mementos ela é maior e menor? c- explique essa variação considerado os movimentos que a terra realiza.

In france, grapes are 1.95 euros per kilogram. what is the cost of grapes, in dollars per pound, if the exchange rate is 1.14 dollars/euro? (2.6)

All motion is caused by force? true or false

Answer asap need to be answered by wednesday morning explain how a buffer works, using an ethanoic acid / sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.