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DaniilM [7]
3 years ago
8

16 POINTS answer correctly and I’ll give you brainliest

Physics
2 answers:
ivanzaharov [21]3 years ago
8 0
I think it is the last one
vlabodo [156]3 years ago
6 0
I think it’s gonna be the 3 one
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What are the three ways of answering a scientific question
My name is Ann [436]

Answer:

Let's start by understanding what exactly a scientific question is. A scientific question is a question that may lead to a hypothesis and help us in answering (or figuring out) the reason for some observation. A good scientific question has certain characteristics. It should have some answers (real answers), should be testable.

Here's examples of a few:

Why is that a star?

or

What is that star made of?

Hope this can lead you to the answer you're looking for at least!!

5 0
3 years ago
A bungee jumper feels weightless as she falls toward the earth.what accounts for her weightless feeling when she fall freely?1.
Ann [662]

The feel of weight comes due to the normal reaction force given by the support. Hence, the condition of weightlessness is when the normal reaction force becomes zero. So, during free fall there is no support which can provide the normal reaction. Hence, the bungee jumper feels weightless as she falls towards the earth because of the lack of support force that balances gravity.

Hence, the answer is 3.

8 0
3 years ago
Read 2 more answers
What kind of energy does an unlit match have?
Oliga [24]

The type of energy that an unlit match has is potential energy.

5 0
3 years ago
How is a theory different from a hypothesis?
monitta

Answer:

A theory is a system of ideas intended to explain something, and a hypothesis is an educated guess.

Explanation: Hope this Helps! :)

6 0
4 years ago
A particular spring does not obey Hooke's law (F(x) = -kx), but rather is described by F(x)=-k x-kax? x is the displacement of t
Nana76 [90]

Answer:

\displaystyle U=-3.45x^2-3.3x^3

F(0.265)=-2.52\ N

Explanation:

<u>Spring Potential Energy </u>

For any expression of the restoring force F as a function of the displacement from the equilibrium point x, the change of potential energy is equivalent to the work done to move the object from one point to another.

(a) The potential energy is

\displaystyle U=\int_{0}^{x}F(x).dx

We have that

F(x)=-6.9x-9.9x^2

Thus

\displaystyle U=\int_{0}^{x}(-6.9x-9.9x^2).dx

\displaystyle U=-6.9\frac{x^2}{2}-9.9\frac{x^3}{3}

\displaystyle U=-3.45x^2-3.3x^3

(b) Knowing that x=26.5 cm = 0.265 m

F(0.265)=-6.9\cdot 0.265-9.9\cdot 0.265^2

F(0.265)=-2.52\ N

4 0
3 years ago
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