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Alenkinab [10]
4 years ago
15

In a controlled experiment, which variable does the investigator change?

Physics
2 answers:
bagirrra123 [75]4 years ago
8 0
The investigator changes the independent variable
Bas_tet [7]4 years ago
7 0

Answer:

The manipulated variable is also known as the independent variable

Explanation:

When remembering this remember independent as in you independently change the outcome

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Is there any machine that is 100% efficient? why?why not
denis-greek [22]

Answer:

No, it's not there.

Explanation:

For a machine to be 100% efficient, it has to be with an output which is equal to its input. But machines have an out put less than an input, hence efficiency below 100%.

7 0
3 years ago
If a calorie is equivalent to 4.184 joules how many joules are contained in 250 kg calories slice of pizza
Andreyy89
In order to answer this, we will set up a simple ratio as such:

1 calorie = 4.184 joules

1 kilocalorie = 1000 calories

1 kilocalorie = 4,184 joules

250 kilocalories = x joules

Cross multiplying the second and third equations, we get:

x joules = 4,184 * 250

250 kilocalories are equivalent to 1,046 kJ
6 0
3 years ago
What sound signal tells a river lock attendant that you wish to go through the lock?
Hoochie [10]
In order to tell a river lock attendant that you wish to go through the lock, you should <span>sound one prolonged blast followed by one short blast.

You should wait about 400 feet away from the lock and wait for the flashing light signal that allows you to enter.
Also note that </span><span>commercial traffic  always have the first priority in entering the locks.</span>
6 0
3 years ago
Mechanical energy is lost:
9966 [12]
3. Due to the fact that friction is not converted to kinetic energy nor potential energy. The energy is converted into heat energy which is lost and can’t be put back
7 0
2 years ago
PLEASE HELP! I'LL GIVE BRAINLEST​
Harlamova29_29 [7]

Answer:

1.62 m/s²

Explanation:

8 0
3 years ago
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