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prohojiy [21]
3 years ago
12

Tina walked 300m in 100s and200m in 150s. What was her average speed.

Physics
1 answer:
skelet666 [1.2K]3 years ago
5 0

Answer:

2m/s

Explanation:

Total Distance = 300m+200m = 500m

Total Time = 100s+150s = 250s

Average Speed = Total distance travelled/Total time taken

=500m/250s

=2m/s

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Scientists study how the continents move. Why might scientists use a model
tigry1 [53]

Answer:

B. It is too slow to observe directly

Explanation:

They move too slow to be able to observe how they move.


I hope it helps! Have a great day!
bren~

3 0
2 years ago
I need help on this question!
NARA [144]

Answer:

All of these

Explanation:

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4 0
3 years ago
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A methanogen is prokaryotic and unicellular, and it also lives in extreme environments. Which kingdom does it belong in?
marissa [1.9K]

Answer:

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Explanation:

5 0
3 years ago
The differential equation below models the temperature of an 88°C cup of coffee in a 24°C room, where it is known that the coffe
densk [106]

Answer:

y = 24+64\cdot e^{-150\cdot t}

Explanation:

Let solve the differential equation by separating corresponding variables:

\int\limits^t_0\, dt = -\frac{1}{150} \int\limits^y_{y_{o}} \frac{dy}{y-24}

The solution of this equation is:

t = -\frac{1}{150}\cdot (\ln|y-24|-\ln |y_{o}-24|)

The explicit form of the temperature as a function of time is:

\ln |y-24|=-150\cdot t + \ln |y_{o}-24|

y-24 = C\cdot e^{-150\cdot t}

The value of the integration constant is:

C = 64

The complete expression is:

y = 24+64\cdot e^{-150\cdot t}

3 0
3 years ago
I throw a ball off the edge of a 15.0m cliff. If I threw it horizontally at 8.0 m/s, how much time did it take to fall?
pickupchik [31]
Just ignore the horizontal component 

if you have a vertical displacement of 15m, 0ms^1 initial velocity, end velocity is ignored, we know the acceleration due to gravity as 9.81ms^2 so we can work out the time using SUVAT

S=15
U=0
V=?
A=9.81
T=?

S=UT + 0.5 AT^2

UT=0

therefore,

S=0.5AT^2

rearrange to:

T=SQR (2S/A)

T = 1.75 seconds
 


3 0
3 years ago
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