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3 years ago

Radiation transfers thermal energy through

Physics

1 answer:

Kay [80]3 years ago

3 0

Answer: your answer is waves.

I will type random words cause my answer is “too short”: dnuidnuindudnnnudinnndijndiudnnnndnijndjidnjidnijdnijdnnnndnjidnjidnnn

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A ball is projected at an immovable wall with a speed vi and bounces back the wall in such a manner that it only has 1/3 of its

sergey [27]

The fraction of the kinetic energy of the ball lost during the collision is $\frac{1}{3}$ .

The given parameters;

<em>initial speed of the ball, = vi</em>
<em>final momentum of the ball, Pf = ¹/₃Pi</em>

The initial and final momentum of the ball is calculated as;

$P_i = m_ivi$

$P_f = m_fv_f = \frac{1}{3} m_iv_i$

The initial and final kinetic energy of the ball is calculated as;

$K.E_i = \frac{1}{2} m_iv_i^2 = \frac{1}{2} P_iv_i\\\\K.E_f = \frac{1}{2} m_fv_f^2= \frac{1}{2} (\frac{1}{3} P_iv_i)= \frac{1}{6} P_iv_i$

The change in the kinetic energy is calculated as;

$\Delta K.E = K.E_f - K.E_i \\\\\Delta K.E = \frac{1}{6} P_iv_i - \frac{1}{2} P_iv_i = \frac{1}{3} P_iv_i$

Thus, the fraction of the kinetic energy of the ball lost during the collision is $\frac{1}{3}$ .

Learn more here:brainly.com/question/18566218

5 0

3 years ago

Three electromagnetic waves travel through a certain point P along an x axis. They are polarized parallel to a y axis, with the

chubhunter [2.5K]

Answer:

$4.846*10^{-5} sin(5*10^{14}t )$

Explanation:

Frequency of each electromagnetic wave is same thus we can interfere them along X axis in Phase diagram.

In phase diagram indicate each wave as vector with amplitude as length and phase difference as angle. (shown in attachment)

Now take component of E2 and E3 amplitude along X direction.

Net amplitude of all E in X direction = $4*10^{-5}$ + cos(45)[ $6*10^{-6}$ + $6*10^{-6}$ ]

⇒ $4.846*10^{-5}$

Final resultant have no change in frequency

So , resultant is $4.846*10^{-5} sin(5*10^{14}t )$

6 0

4 years ago

Which would take a longer time to warm up, a piece of brass or a piece of marble, given that both

diamong [38]

Answer:

Explanation:

specific heat of marble is 880 J/kg °C

specific heat of brass is 920 J/kg °C

If Q heat is given to a body of mass m and specific heat s , and there is a rise of temperature t

Q = m s t

t = Q / m s

if Q and m is constant

t is inversely proportional to specific heat .

so rise in temperature will be inversely proportional to specific heat .

lower the specific heat , higher will be the rise in temperature . Since marble has lower specific heat , rise in temperature in marble will be higher and quicker .

So brass will take longer time to warm up.

7 0

3 years ago

beth walked to the school in 80 seconds from a position 100 m west of the school. what was her velocity?

Ugo [173]

1.8 meters a second

100/80

4 0

3 years ago

How many species go extinct every day??

Law Incorporation [45]

Approximately 150-200 species.

5 0

3 years ago