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3 years ago

5

Which of the following quantities is a scalar?

2 answers:

Oxana [17]3 years ago

8 0

Answer:

The answer is C

Explanation:

Scalar is a quantity that has only magnitude with no directions.

In the options above, option A, B and D show the directions which is Vector quantity.

djyliett [7]3 years ago

6 0

Answer:

Option C

Explanation:

Scalar quantities are described by its magnitude only. They do not need to be described by the direction. So, 20 miles per hour is the scalar quantity.

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Which uses direct current?

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Answer:

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Explanation:

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Modeling tool or Align tool. it depends what type of sandbox platform you use

Explanation:

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3 years ago

A person pushes two boxes with a horizontal force F of magnitude of 100 N.

Monica [59]

The magnitude of the action–reaction pair between the two boxes (A and B) will be "18.2 N".

According to the question,

Mass of box A,

$m_A = 9\ kg$

Mass of box B,

$m_B = 2 \ kg$

Horizontal force,

$F_{app} = 100 \ N$

From the Newton's law,

→ $F_{app} = (\frac{F_{app}}{m_A+m_B} )a$

or,

→ $a = \frac{F_{app}}{(m_A+m_B)}$

Bu substituting the values, we get

→ $= \frac{100}{9+2}$

→ $= \frac{100}{11}$

→ $9.10 \ m/s^2$

We can see that between the two boxes, the action-reaction pair exist.

then,

→ $F_{action-reaction} = m_b \ a$

→ $=2\times 9.10$

→ $= 18.2 \ N$ (magnitude)

Thus the above solution is appropriate.

Learn more about the magnitude here:

brainly.com/question/13545862

7 0

3 years ago

A possum is trying to cross the street. Its velocity v as a function of time t is given in the graph below

AlladinOne [14]

Answer:

-10

Explanation:

The rectangular area is the base bbb times height hhh.

\begin{aligned}\Delta x&= A \\\\ &=(2\,\text s)\left (-5\,\dfrac{\text m}{\text s}\right ) \\\\ &= -10\,\text m\end{aligned}

Δx

=A

=(2s)(−5

s

m

)

=−10m

The possum displaces 10\,\text m10m10, start text, m, end text to the left.

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Stress is the body's automatic physical reaction to real or imagined forces.

MrRissso [65]

The answer is true all the way

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