serious7

So it is always the total distance divided by total time then. My next questions is this equation. Vav=d2-d1/t2-t1 If i were to find the average speed of an object from a distance-time graph, would d1 and t1 always be 0.0 km and 0.0 minutes? And when will it not be 0.0? And how did you get an instantaneous speed of 8 m/s in your example?

OK how about this. How can I find the average speed from a distance-time graph if the line is not straight but rather curved?

Hi guys, I'm having trouble understanding what average speed is all about. The equation that I know of calculating average speed is: a(subscript av)=delta d/delta t. Now is average speed the total distance travelled over total time as my book says it is? I'm kinda confused at that because how can the total distance travelled divided by the total time travelled give you the average speed. Isn't that the instantaneous speed? Suppose i'm observing a distance-time graph and the line is not straight but rather curved. If i follow the terminology from the book, all i would "need" to do to find the average speed is look at the total distance travelled and divide it by the total time travelled which should be the point at the end of the graph. How can that be the "average speed" of an object? Isn't it the instantaneous speed of an object at that particular moment? If I didn't make any sense of my question then please tell me so I can clarify it. Thanks.

Thanks for your help. My teacher just gave me the wrong information and i had serious doubts of it. The test didn't have nothing on litmus paper results anyways

My teacher said blue litmus paper stays blue in acids. I checked wikipedia and it said that blue litmus paper changes red in acids. I don't know what to believe Oh and can the blue litmus paper read bases or can it only read acids?

BUT why is it be b?????? Isn't algae grown in the oceans? Fertilizers are used in soils by everyone so it is generally beneficial to ecosystems more than helping the growth of algae.

Hi, i'm a grade 10 high school student and i just had my biology test today. Basicly, i'm kind-of worried as the test was sortoff (bullshit) xD. Some of the questions wasn't even in our review so i'm deeply worried. I remmeber some of the multiple choice questions and i want to know your opinions as to what the answer may be. 1. Could the spring runoff off fertilizers that contain nitrogen and phosphorus be: a)generally beneficial to the ecosystem b)help grow excessive algae I put answer A. 2. Which of the following biomes is best suitable to having trees losing leaves in the winter. a) tundra b)tropical rain forests c)deciduous forest d) all of the above I put answer C.

Hi, i'm a grade 10 high school student and i just had my biology test today. Basicly, i'm kind-of worried as the test was sortoff (bullshit) xD. Some of the questions wasn't even in our review so i'm deeply worried. I remmeber some of the multiple choice questions and i want to know your opinions as to what the answer may be. 1. Could the spring runoff off fertilizers that contain nitrogen and phosphorus be: a)generally beneficial to the ecosystem b)help grow excessive algae I put answer A. 2. Which of the following biomes is best suitable to having trees losing leaves in the winter. a) tundra b)tropical rain forests c)deciduous forest d) all of the above I put answer C.