3 years ago

What is the definition of a reference point

Physics

1 answer:

riadik2000 [5.3K]3 years ago

8 0

A reference point would be something used to understand or judge or describe a certain topic in discussion.

You might be interested in

Which types of electromagnetic waves have wavelengths that are longer than those of visible light but shorter than those of micr

Kaylis [27]

The answer C) Infrared light

5 0

2 years ago

Read 2 more answers

A river flows with a speed of 0.600 m/s. A student first swims upriver 0.500 km, then turns around and returns to his starting p

DerKrebs [107]

Answer:

a) 1111.0 seconds

b) 833.3 s

c) Because of proportions

Explanation:

a) Total time of round trip is the sum of time upriver and time downriver

$t_{total}=t_{up}+t_{down}$

Time upriver is calculated with the net speed of student and 0.500 km:

$t_{up}=\frac{d_{istance}}{|v_{swimmer}|} ;\\v_{swimmer}=v_{relative to river}+v_{river}=-1.2+0.6=-0.6 m/s\\t_{up}=\frac{500 m}{0.6 m/s}=833.3 s$

(Becareful with units 0.5 km= 500m) Similarly of downriver:

$t_{down}=\frac{d_{istance}}{|v_{swimmer}|} ;\\v_{swimmer}=1.2+0.6=1.8 m/s\\t_{down}=\frac{500 m}{1.8 m/s}=277.7 s$

So the sum is:

$t_{total}=1111.0s$

b) Still water does not affect student speed, so total time would be simply:

$t_{total}=\frac{1000 m}{1.2 m/s}=833.3 s$

c) For the upriver trip, student moved half the distance in half speed of the calculation in b), so it kept the same ratio and therefore, same time. So the aditional time is actually the downriver.

6 0

2 years ago

Roots that grow horizontally are called

Romashka [77]

I believe they are called Rhizomes.

8 0

3 years ago

Read 2 more answers

Gauges all very according the vehicle , model make and year and other factors. By turning the vehicle to the ___ position you ca

AleksandrR [38]

Answer:

By turning the vehicle "ON" position you can check to see if the gauges light works.

When we switch ON or turn a key to ON the engine, we can find all the gauges working or not.

4 0

3 years ago

Which is the main purpose of an experimental conclusion?

Reptile [31]

Answer:

the Answer is B

because the purpose of experimental conclusion it is to prove rather is a right or wrong is a hypothesis is right or wrong

8 0

3 years ago