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3 years ago

Plzz help,i will mark you as brainlist

Physics

1 answer:

Fantom [35]3 years ago

4 0

Answer:

could you please send the whole question so I could understand

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A black body radiates heat energy at the rate of 2 x 10 Js" m' at a temperature of 127° C. The temperature

Degger [83]

Answer:

527 ° C

Explanation:

For black body radiation, the power emitted per unit area is directly proportional to the absolute temperature raised to the fourth power:

j = k T⁴

First, convert 127° C to Kelvins:

127° C + 273.15 = 400.15 K

Now find the constant of variation:

2×10⁵ = k (400.15)⁴

k = 7.80×10⁻⁶

Finally, solve for the temperature at the new rate of radiation:

32×10⁵ = (7.80×10⁻⁶) T⁴

T = 800.3

The temperature is 800 K, or about 527 ° C.

5 0

3 years ago

In damped harmonic oscillation, the amplitude of oscillation becomes one third after 2 second. If A0 is initial amplitude of osc

Harman [31]

Answer:

$A=\frac{A_0}{\sqrt 3}$

Explanation:

Initial amplitude= $A_0$

We are given that

Amplitude after 2 s=A= $\frac{1}{3}A_0$

We have to find the amplitude after 1 s.

We know that amplitude at any time t

$A=A_0e^{-\alpha t}$

Using the formula

$\frac{A_0}{3}=A_0e^{-2\alpha}$

$\frac{1}{3}=e^{-2\alpha}$

$3=e^{2\alpha}$

$ln 3=2\alpha$

$\alpha =\frac{ln 3}{2}=ln\sqrt 3$

$e^{\alpha}=\sqrt 3}$

When t=1 s

$A=A_0e^{-\alpha}=\frac{A_0}{\sqrt 3}$

8 0

4 years ago

WHAT ARE THE NECESSARY CONDITIONS TO CREATE A WAVE?

never [62]

There are no necessary conditions there’s always waves the ocean is never still or if your talking about a lake you need movement

3 0

3 years ago

Which of the following processes could have caused this cave to fill with water?

Mars2501 [29]

Your answer would be D. Transpiration

5 0

3 years ago

Pressure and volume changes at a constant temperature can be calculated using

V125BC [204]

Answer:

Option A, Boyle's law

Explanation:

The complete question is

Pressure and volume changes at a constant temperature can be calculated using

a. Boyle's law. c. Kelvin's law.

b. Charles's law. d. Dalton's law.

Solution

In Boyle’s law, the gas is assumed to be ideal gas and at constant temperature. With these two conditions fixed, Boyle’s established that volume of gas varies inversely with the absolute pressure.

The basic mathematical representation of this phenomenon is as follows -

$P \alpha \frac{1}{V}$

$P = \frac{k}{V} \\PV = k$

Where P is the pressure of ideal gas, V is the volume and k is the constant of proportionality.

Hence, option A is correct

3 0

3 years ago

Plzz help,i will mark you as brainlist​

Plzz help,i will mark you as brainlist