If you are given distance and period of time, what can you calculate?

Physics

2 answers:

ira [324]3 years ago

8 0

D. speeds

because you gotta go fast jk if take mph miles per hour that's a distance and a time there for you would be able to calculate speed

mash [69]3 years ago

3 0

speed

this is correct i took the test

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A small water droplet in a mist of air is approximated as being a sphere of diameter 1.25 mil. Calculate the terminal velocity a

shtirl [24]

The terminal velocity as it falls through still air is 4.65154 in/s.

The diameter of small water droplet is 1.25 mil= 1.25×0.0254×10^-3 m

= 3.175 × 10^-5 m

Now the viscosity of still air is η = 1.83× 10⁻⁵ Pa

So the formula for drag force is:

Fd = 6πηrv

where, v is the velocity.

Now to attain terminal velocity acceleration must be zero.

→ W = Fd

ρVg = 6πrηv

ρ × 4/3 πr³×g = 6πrηv

v = 2/9 × ρgr³/ η

v = 2/9 × 10³×9.81×(3.175×10^-3) / 18.6×10^-6

v = 0.1181 m/s

v = 4.65154 in/s

Learn more about terminal velocity here:

brainly.com/question/20409472

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8 0

2 years ago

The starships of the Solar Federation are marked with the symbol of the Federation, a circle, whereas starships of the Denebian

Llana [10]

Complete question

The complete question is shown on the first uploaded image

Answer:

The velocity is $v = c* \sqrt{1 - \frac{1}{n^2} }$

Explanation:

From the question we are told that

a = nb

The length of the minor axis of the symbol of the Federation, a circle, seen by the observer at velocity v must be equal to the minor axis(b) of the Empire's symbol, (an ellipse)

Now this length seen by the observer can be mathematically represented as

$h = t \sqrt{1 - \frac{v^2}{c^2} }$

Here t is the actual length of the major axis of of the Empire's symbol, (an ellipse)

So t = a = nb

and b is the length of the minor axis of the symbol of the Federation, (a circle) when seen by an observer at velocity v which from the question must be the length of the minor axis of the of the Empire's symbol, (an ellipse)

i.e h = b

$b = nb [\sqrt{1 - \frac{v^2}{c^2} } ]$