Thursday
May 23, 2013

# Posts by Ella

Total # Posts: 172

SCIENCE!!!
Do plant cells have cell walls?!?

science!!!
so it is not a plant cell?

science!!!
Is a prokaryotic cell a plant cell?!?

HISTORY!!!
How did the Dawes Act affect the Native Americans?

HISTORY!!!
How did the government limit the movement of native americans?

HISTORY!!!
What is the culture of the PLains Indians?

Physics HELP!
A mountaineer estimates the depth of a crevasse by dropping a stone and listening for sound when the stone hits the bottom. The speed of sound in air is 340m/s. If the sound is heard 10s after the stone is dropped, what is the depth of the crevasse? Do you find velocity first?...

physics- uniform acceleration
The speedometer of a uniformly accelerating car is read as it crosses each of three equally spaced lines. The reading is 30km/h at the first, 40km/h at the second. What is it at the third? I tried to turn this into an equation but didn't know how. Would you use V2^2 = V1^2...

physics- kinematics
General question- when do you use NEGATIVE for 9.8m/s^2? Even when the questions says "an object is thrown up in the air from top of the building, on its way down, it misses the building and falls to the ground below." If you do use a negative value, why is that?

Physics: Non uniform motion
wait.. i didnt get the right answer. i got 530 m in teh 10th second and then 432.9 in the 9th subtracted, they give 97.1 but the answer should be 38 m?

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