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3 years ago

Which statements describe properties of stars?

Physics

2 answers:

Ede4ka [16]3 years ago

7 0

Statements 1, 3, and 5 are true.

(A, C, and E)

Vanyuwa [196]3 years ago

7 0

Answer:

Statements 1,3, and 5 are correct

Explanation:

The facts which are correct of stars are ( among the given options)

1. Stars produce energy by nuclear fusion reaction.( in nuclear fusion reaction two molecules of hydrogen combine to form helium atom releasing a lot of energy.)

3. Stars are massive objects Composed of gases.

5. Stars are composed primarily of hydrogen and helium.

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the amplitude of the wave is which of the following A. Resonance B. Reflection C. Energy D. Magnitude

OLga [1]

D.Magnitude is the answer

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3 years ago

In the Hydrogen atom, the energy spacing between the is 4.07 x 101 J (Joules). When an is the frequency of the photons emitted?

agasfer [191]

Answer:

The frequency of the photon is $3.069\times10^{14}\ Hz$ .

Explanation:

Given that,

Energy $E=4.07\times10^{-19}\ J$

We need to calculate the energy

Using relation of energy

$E_{4}-E_{2}=\Delta E$

Where, $\Delta E$ = energy spacing

$4h\nu-2h\nu=4.07\times10^{-19}$

$\nu=\dfrac{4.07\times10^{-19}}{2h}$

Put the value of h into the formula

$\nu=\dfrac{4.07\times10^{-19}}{2\times6.63\times10^{-34}}$

$\nu=3.069\times10^{14}\ Hz$

Hence, The frequency of the photon is $3.069\times10^{14}\ Hz$ .

4 0

3 years ago

Which is the hottest planet in the solar system

polet [3.4K]

Answer:

venus

Explanation:

6 0

3 years ago

Read 2 more answers

Shrinking Loop. A circular loop of flexible iron wire has an initial circumference of 168 cm , but its circumference is decreasi

DedPeter [7]

Answer:

103.1 V

Explanation:

We are given that

Initial circumference=C=168 cm

$\frac{dC}{dt}=-15cm/s$

Magnetic field,B=0.9 T

We have to find the magnitude of the emf induced in the loop after exactly time 8 s has passed since the circumference of the loop started to decrease.

Magnetic flux= $\phi=BA=B(\pi r^2)$