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2 years ago

The speed of molecules is indirectly related to a measurement called _____.

Physics

2 answers:

Lubov Fominskaja [6]2 years ago

6 0

Answer : (c) temperature is the correct option.

Explanation :

The speed of molecules is directly proportional to temperature. If the temperature of the system is increased, the molecules start vibrating i.e. their kinetic energy increases which in turn increase its velocity.

From kinetic theory of gases,

$v_{rms}=\sqrt{\dfrac{3\ RT}{M}}$ ........(1)

where,

R is the gas constant

T is temperature

M is molar mass

So, from equation (1) it is clear that velocity is directly proportional to temperature.

Hence, the correct option is (B) " temperature"

seraphim [82]2 years ago

4 0

The average speed of all the molecules in an object
or sample of a substance is related to its temperature ...
and not indirectly at all.

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A concave mirror has a focal length of 13.5 cm. This mirror forms an image located 37.5 cm in front of the mirror. Find the magn

77julia77 [94]

Explanation:

It is given that,

Focal length of the concave mirror, f = -13.5 cm

Image distance, v = -37.5 cm (in front of mirror)

Let u is the object distance. It can be calculated using the mirror's formula as :

$\dfrac{1}{v}+\dfrac{1}{u}=\dfrac{1}{f}$

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

$\dfrac{1}{u}=\dfrac{1}{(-13.5)}-\dfrac{1}{(-37.5)}$

u = -21.09 cm

The magnification of the mirror is given by :

$m=\dfrac{-v}{u}$

$m=\dfrac{-(-37.5)}{(-21.09)}$

m = -1.77

So, the magnification produced by the mirror is (-1.77). Hence, this is the required solution.

7 0

2 years ago

A bungee cord has a spring constant of 82.5 N/m. After jumping, a person oscillates with a period of 7.50 s. What is the mass of

Arada [10]

Answer:

Explanation:

T = 2π √ (m/k)

T / 2π = √ (m/k)

T√k = 2π √m

(T√k) / 2π = √m

( (T√k) / 2π)^2 = m

m = ( (7.5√82.5) / 2π)^2

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3 0

2 years ago

A particle moves at a constant speed in a circular path with a radius of r=2.06 cm. If the particle makes four revolutions each

nataly862011 [7]

The centripetal acceleration is $13.0 m/s^2$

Explanation:

For an object in uniform circular motion, the centripetal acceleration is given by

$a=\frac{v^2}{r}$

where

v is the speed of the object

r is the radius of the circle

The speed of the object is equal to the ratio between the length of the circumference ( $2\pi r$ ) and the period of revolution (T), so it can be rewritten as