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2 years ago

What is the displacement of a car in 50 s if it is travelling with a velocity of 25 m/s?

Physics

1 answer:

Schach [20]2 years ago

7 0

Answer:

v =25 m/s

time= 50 s

Velocity =Displacement/Time

Displacement = Velocity × Time

S = 25×50

s=1250m

Explanation:

v =25 m/s

time= 50 s

Velocity =Displacement/Time

Displacement = Velocity × Time

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The cornea behaves as a thin lens of focal lengthapproximately 1.80 {\rm cm}, although this varies a bit. The material of whichi

Keith_Richards [23]

Answer:

Explanation:

a )

from lens makers formula

$\frac{1}{f} =(\mu-1)(\frac{1}{r_1} -\frac{1}{r_2})$

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putting the values

$\frac{1}{1.8} =(1.38-1)(\frac{1}{.5} -\frac{1}{r_2})$

1.462 = 2 - 1 / r₂

1 / r₂ = .538

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= 18.6 mm .

b )

object distance u = 25 cm

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image distance v = ?

lens formula

$\frac{1}{v} - \frac{1}{u} = \frac{1}{f}$

$\frac{1}{v} - \frac{1}{-25} = \frac{1}{1.8}$

$\frac{1}{v} = \frac{1}{1.8} -\frac{1}{25}$

.5555 - .04

= .515

v = 1.94 cm

c )

magnification = v / u

= 1.94 / 25

= .0776

size of image = .0776 x size of object

= .0776 x 10 mm

= .776 mm

It will be a real image and it will be inverted.

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3 years ago

The slope of the line on a speed-time graph tells the speed , true or false ?

KengaRu [80]

True I hope this helps you out

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tangare [24]

Wouldn't it be neat if an electron falling closer to the nucleus ... emitting a
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All we'd need is a pile of it in our basement, with a bright light bulb over the pile,
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The energy an electron absorbs when it climbs to a higher energy level (forming
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it falls back to its original level (creating the atom's emission spectrum).

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into it from somewhere can't be created there.

You get what you pay for, or, as my grandfather used to say, "For nothing
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Answer:

option B is the correct answer

Explanation:

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2 years ago

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shepuryov [24]

Explanation:

Hello there!!!

You just need to use simple formula for force and momentum, 

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and momentum (p)= m.v

where m= mass

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And the solutions are in pictures. 

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