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katovenus [111]
3 years ago
7

Discuss how scientific knowledge and reasoning can be used to help us make decisions. Provide at least one example. (4 points)

Physics
1 answer:
soldier1979 [14.2K]3 years ago
7 0

Because we can predict the outcome by making a hypothesis from what you already know.

you pick a certain route bc you know the other has more traffic and will take longer even though it is a shorter distance

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Measurements of acceleration are given in units of ?
Lady_Fox [76]
Meters per second squared: \frac{m}{s^{2}}

If you think about it, acceleration is about how fast speed changes. Speed is measured in meters per second: \frac{m}{s}

So if you take that and just measure it over time, you get meters per second squared.
3 0
3 years ago
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A rock is rolling down a hill. At position 1, its velocity is 2.0 m/s. Twelve seconds later, as it passes position 2, its veloci
alukav5142 [94]
As this happens over twelve seconds, you would take the total difference in velocities and divide it by twelve to find the change per second

44.0 m/s - 2.0 m/s = 42.0 m/s 

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the acceleration of the rock would be 3.5 m/s2
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3 years ago
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A 1500-W electric heater is plugged into the outlet of a 120-V circuit that has a 20-A circuit breaker. You plug an electric hai
tekilochka [14]

Answer:

900 W.      

Explanation:

Given that

Electric heater 1500 W

We know that power P given as

P= V I

So the total power of 120 V and 20 A circuit

P = 120 x 20

P= 2400 W

So the power new load P'

P'= Total system power(P)- Electric heater load

P ' = 2400 - 1500

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So the answer is 900 W.

6 0
3 years ago
I'm willing to give a lot of points if u can help me out.
Anettt [7]

Answer:

i have absolutly no idea how to do it but i looked it up and your answer should be B. i could be wrong but thats what the web told me

7 0
3 years ago
Two locomotives approach each other on parallel tracks. Each have a speed of 95 km/h with respect to the ground. If they are ini
viva [34]
If they are both  traveling with the same speed that means that they will reach other in the middle of the line initially between them. In other word, each will have to travel the same amount before they reach other. 

Now you can calculate the time it takes for only one locomotive to travel half of the total distance between them, and that time is equal to the time you are looking for.

Use 
   t =  S1/2 / v

  where t-time, S-distance traveled , v-velocity




8 0
4 years ago
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