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1 year ago

Use the paragraph to answer the question.

1 answer:

4 0

The characteristic of science that is best exemplified by the paragraph presented is "It is falsifiable and reproducible."

<h3>What is science?</h3>

Science can be mostly defined as a set of methods and principles that aim at objectively understanding and explaining the phenomena that occurs in the world.

These set of methods and principle lead to theories and laws that describe how a specific phenomenon occurs.

<h3>What does "It is falsifiable and reproducible"?</h3>

This is a basic principle that implies hypotheses about a specific phenomenon can be tested using experiments and this can lead to either the confirmation of the hypothesis or dispproved. Moreover, same experiments can be used and these will have similar results.

This principle matches the paragraph because the same experiment leads to same results. Moreover, previous ideas about a phenomenon were disproved.

Learn more about science in: brainly.com/question/12842883

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Cars A and B are racing each other along the same straight road in the following manner: Car A has a head start and is a distanc

4vir4ik [10]

The question is incomplete. Here is the complete question.

Cars A nad B are racing each other along the same straight road in the following manner: Car A has a head start and is a distance $D_{A}$ beyond the starting line at t = 0. The starting line is at x = 0. Car A travels at a constant speed $v_{A}$ . Car B starts at the starting line but has a better engine than Car A and thus Car B travels at a constant speed $v_{B}$ , which is greater than $v_{A}$ .

Part A: How long after Car B started the race will Car B catch up with Car A? Express the time in terms of given quantities.

Part B: How far from Car B's starting line will the cars be when Car B passes Car A? Express your answer in terms of known quantities.

Answer: Part A: $t=\frac{D_{A}}{v_{B}-v_{A}}$

Part B: $x_{B}=\frac{v_{B}D_{A}}{v_{B}-v_{A}}$

Explanation: First, let's write an equation of motion for each car.

Both cars travels with constant speed. So, they are an uniform rectilinear motion and its position equation is of the form:

$x=x_{0}+vt$

where

$x_{0}$ is initial position

v is velocity

t is time

Car A started the race at a distance. So at t = 0, initial position is $D_{A}$ .

The equation will be:

$x_{A}=D_{A}+v_{A}t$

Car B started at the starting line. So, its equation is

$x_{B}=v_{B}t$

Part A: When they meet, both car are at "the same position":

$D_{A}+v_{A}t=v_{B}t$

$v_{B}t-v_{A}t=D_{A}$

$t(v_{B}-v_{A})=D_{A}$

$t=\frac{D_{A}}{v_{B}-v_{A}}$

Car B meet with Car A after $t=\frac{D_{A}}{v_{B}-v_{A}}$ units of time.

Part B: With the meeting time, we can determine the position they will be:

$x_{B}=v_{B}(\frac{D_{A}}{v_{B}-v_{A}} )$

$x_{B}=\frac{v_{B}D_{A}}{v_{B}-v_{A}}$

Since Car B started at the starting line, the distance Car B will be when it passes Car A is $x_{B}=\frac{v_{B}D_{A}}{v_{B}-v_{A}}$ units of distance.

5 0

3 years ago

What is the function of the commutator in a motor?

vlabodo [156]

The answer you are looking for is:
D.) It facilitates the moment of the current though a wire.
Hope that helps!!
Have a wonderful day!!<span />

7 0

3 years ago

Read 2 more answers

An airliner arrives at the terminal, and its engines are shut off. The rotor of one of the engines has an initial clockwise angu

Ilia_Sergeevich [38]

(a) 1200 rad/s

The angular acceleration of the rotor is given by: