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4 years ago

A nova occurs when

1 answer:

5 0

C. hydrogen accreted onto a white dwarf from a close companion rapidly fuses to helium, releasing a large amount of energy.

The accreted material, composed mainly of hydrogen, is compacted on the surface of the white dwarf due to the intense gravitational force on that place. As material accumulates, The white dwarf becomes increasingly hot, until it reaches the critical temperature for ignition of nuclear fusion.

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Matter comprises all of them and among them are independent. what are they

telo118 [61]

<em>Matter is composed of elementary particles i.e. quarks and leptons.</em>

<em>Matter is composed of elementary particles i.e. quarks and leptons.Matter is composed of elementary particles which is called quarks and leptons. Quarks consist of protons, neutrons and electrons. All observable matter is made up of up quarks, down quarks and electrons.Lepton is an elementary particle consist of half-integer spin that does not undergo strong interactions. Leptons exist on two main classes i.e. charged leptons, and neutral leptons. Electron, electron neutrino, muon, muon neutrino, tau and tau neutrino are the six types of leptons.</em>

8 0

3 years ago

If two firecrackers produce a sound level 85dB. What level does the explosion of one firecracker produce?

mars1129 [50]

Level of sound is related to intensity by this equation

$L = 10 Log \frac{I}{I_o}$

given that

L = 85 dB

also we know that

$I_o = 10^{-12} W/m^2$

now we have

$85 = 10 Log \frac{I}{10^{-12}}$

By solving above equation

$I = 10^{8.5} * 10^{-12}$

$I = 3.16 * 10^{-4} W/m^2$

now above is the intensity due to two firecrackers and if we wish to find the sound level of one firecracker then we will find its half level intensity

$I_1 = \frac{I}{2}$

$I_1 = 1.58 * 10^{-4}$

now again by above formula

$L = 10 Log \frac{1.58 * 10^{-4}}{10^{-12}}$

$L = 82 dB$

8 0

3 years ago

In what way is a screw similar to an inclined plane?

mylen [45]

They both have a mechanical advantage meaning that the force applied to the mechanism is not the same as the force produced.

5 0

3 years ago

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PLEASE HELP!!!! What is the formula for Carbon Tetrahydride? Is this a covalent or ionic bond? How can you tell?

Elina [12.6K]

Answer:Ionic compounds are (usually) formed when a metal reacts with a nonmetal (or a polyatomic ion). Covalent compounds are formed when two nonmetals react with each other.

Explanation:

hope it helped

8 0

3 years ago

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Across a horizontal distance of 25 feet, a roller coaster has a steep drop. The height of the roller coaster at the bottom of th

allsm [11]

X = total horizontal distance = 25 ft

Y = total vertical distance = 125 ft

x = horizontal distance = 1 ft

y = vertical distance = ?

using the equation

y = (Y/X) (x)

inserting the values

y = (125/25) (1)

y = 5 ft

hence for each horizontal foot, the average height change is 5 ft

25 ft horizontal distance traveled = 125 ft vertical distance dropped

dividing both side by 25

25 ft horizontal distance traveled/25 = 125 ft vertical distance dropped/25

1 foot horizontal distance traveled = 25 ft vertical distance dropped

6 0

3 years ago

Read 2 more answers