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3 years ago

Explain how it is possible for the smallest white dwarfs to be the most massive.

1 answer:

8 0

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.. The most massive stars, with eight times the mass of the sun or more, will never become white dwarfs<span>. Instead, at the end of their lives, they will explode in a violent supernova, leaving behind a neutron star or </span>black hole.

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Match each form of energy with its description.

jekas [21]

Answer:

a box moving along a conveyor belt possesses kinetic energy.

Lightning produced during a storm gives electrical energy.

a piece of fruit hanging from a tree possesses gravitational potential energy.

Sand on a beach feel warm to touch because the sand possesses thermal energy.

Radio waves transmitted from a tower (radiant energy).

Explanation:

7 0

3 years ago

Under specific circumstances, waves will bend around obstacles. This type of bending is called

BartSMP [9]

That type of bending is called "diffraction" of waves.

6 0

3 years ago

Your friend comes across a good deal to purchase a gold ring. She asks you for advice and for you to test the ring. The ring has

Luden [163]

Answer:

She is not getting a good deal.

Explanation:

The equation that relates heat with mass, specific heat and temperature change of an object is $Q=mc\Delta T$ .

Always convert temperature to Kelvin, although in our case it's not necessary because the $\Delta T$ will be the same, and we will leave the mass in grams because we will be getting $J/g^{\circ}C$ units for specific heat, which we can compare to the one given for gold.

We then calculate the specific heat of the object in question:

$c=\frac{Q}{m\Delta T}=\frac{94.8J}{(4.54g)(47.5^{\circ}C-23^{\circ}C)}=0.8523 J/g^{\circ}C$

Which shows it's not gold.

5 0

3 years ago

why was it intresting that democritus came up with atomism given that he was a materialist philosopher

enyata [817]

Answer:

Democritus was the first person to say that everything is made of Atoms, a very long time ago

Hope I was helpful

Explanation:

7 0

3 years ago

Even at such low fractions of the speed of light these stars are moving quite quickly (thousands of kilometers a second) compare

yulyashka [42]

According to Doppler Effect, an observer at rest will perceive a shift in the wavelength or frequency of the radiation emitted by a source in movement.This shift is given by the formula:
$\frac{ \lambda - \lambda_{0} }{ \lambda_{0} } = \frac{-v}{c}$

where:
$\lambda$ = observed wavelength
$\lambda_{0}$ = wavelength at rest
v = speed of source (positive if towards the observer, negative if away from the observer)
c = speed of light

Therefore, we can solve for the observed wavelength:
$\lambda = \lambda_{0} (\frac{-v}{c}) + \lambda_{0} \\ \lambda = \lambda_{0} (1 - \frac{v}{c})$

Substituting the given data:
$\lambda = 656.46 (1 - \frac{300}{299792})$
= 655.80 nm

Hence, the observed wavelength of the line would be 655.80 nm. Note that this value is smaller than the one at rest, which means that we have a blue-shift, as expected for an approaching source.

5 0

3 years ago