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atroni [7]
3 years ago
7

If the rock was going 90m/s when it hit the ground. How many seconds would it have been falling for?

Physics
1 answer:
zhenek [66]3 years ago
8 0

Answer:

it will hit 80

Explanation:

because evey sec

is 10

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1. Acceleration can result from a change of _______, or a change in ___________, or both *
Klio2033 [76]

Answer:

not sure

Explanation:

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jsbsbd the entire community was literate because

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the entire community was literate because

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b. they were too poor to go to school

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3 years ago
Does anybody watch this anime?
lorasvet [3.4K]

Answer:

no lol.. is this actually for school?

5 0
4 years ago
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A carton of 12 rechargable batteries contains one that is defective. In how many ways can the inspector choose 3 of the batterie
atroni [7]
There are 2 defective batteries and 10 good batteries. 
a) none of the defective batteries (10C3) = 120 
b) one of the defective batteries (10C2)(2C1) = 90 
6 0
3 years ago
Carbon-14 is used to determine the age of ancient objects. If a sample today contains 0.060 g of carbon-14, how much carbon-14 m
MakcuM [25]

Answer: 86.47 g of carbon-14 must have been present in the sample 11,430 years ago.

Explanation:

Half-life of sample of carbon -14= 5,730 days

\lambda=\frac{0.693}{t_{\frac{1}{2}}}=\frac{0.693}{5,730 days}=0.00012 day^{-1}

Let the sample present 11,430 years(t) ago = N_o

Sample left till today ,N= 0.060 g

N=N_o\times e^{-\lambda t}

ln[N]=ln[N]_o-\lambda t

\log[0.060 g]=\log[N_o]-2.303\times 0.00012 day^{-1}\times 11,430 days

\log[N_o]=1.9369

N_o=86.47 g

86.47 g of carbon-14 must have been present in the sample 11,430 years ago.

5 0
4 years ago
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WILL MARK BRAINLIEST!
viva [34]

Answer:

True

Explanation:

Newton's first law of motion states that an object at rest will stay at rest unless acted upon by an outside force.

5 0
3 years ago
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