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blsea [12.9K]
4 years ago
12

What do we mean by the event horizon of a black hole?

Physics
1 answer:
Evgen [1.6K]4 years ago
8 0

It is the point in a black hole where nothing, not even light, can escape from.

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Can someone help me with 45a-g and 46?
LUCKY_DIMON [66]

Idk but it must be hard tho

7 0
3 years ago
IF THERE ARE ONLY 118 ELEMENTS, HOW DO YOU
expeople1 [14]

Answer:

Although there are only 118 elements that have been discovered and entered in the Periodic Table, there is an almost infinite multiplicity of things, materials, resources and other objects in the universe.

This is so because each of these elements can be combined with the others, varying its proportion and the inclusion of different elements, forming different things according to the proportion in which each element has been used.

7 0
3 years ago
You are standing on a bathroom scale in an elevator in a tall building. Your mass is
Oksanka [162]

Answer:

94 kg or 921.6 N

Explanation:

The velocity function is v(t) = 3t + 0.2t^2. The acceleration function, a(t), is the time derivative of the velocity function.

a(t) = \dfrac{d}{dt}v(t) = 3 + 0.4t

At t=4,

a(4) = 3 + 0.4\times4 = 3+1.6 =4.6\text{ m/s}{}^2

Because the elevator is going upwards, the net acceleration, a_N = g + a(4) where g us acceleration of gravity.

a_N = 9.8 + 4.6 = 14.4\text{ m/s}{}^2

The resultant weight is

W =m a_N =64\times14.4=921.6 \text{ N}

Since the bathroom scale is graduated in kg, it's reading is

m =\dfrac{W}{g}=\dfrac{921.6}{9.8}=94\text{ kg}

3 0
3 years ago
A proton is accelerated from rest through a potential difference V0 and gains a speed v0. If it were accelerated instead through
Neporo4naja [7]

Answer:

Explanation:

Let the charge on proton be q .

energy gain by proton in a field having potential difference of V₀

= V₀ q

Due to gain of energy , its kinetic energy becomes 1/2 m v₀²

where m is mass and v₀ is velocity of proton

V₀ q = 1/2 m v₀²

In the second case , gain of energy in electrical field

= 2 V₀q , if v be the velocity gained in the second case

2 V₀q = 1/2 m v²

1/2 m v² = 2 V₀q = 2 x 1/2 m v₀²

mv² = 2  m v₀²

v = √2 v₀

6 0
3 years ago
An SUV has a mass of 6000 kg and a compact car has a mass of 2000 kg. They both go around the same unbanked circular curve on th
Evgen [1.6K]

Answer:

Therefore, the centripetal acceleration of the SUV is <u>3 times</u> ao of the compact car.

Explanation:

FOR SUV:

ac_{suv} = \frac{mv^2}{r}\\

where,

ac_suv = centripetal acceleration of the SUV = ?

m = mass of SUV = 6000 kg

v = speed of SUV = vo

r = radius of path

Therefore,

ac_{suv} = \frac{6000\ vo^2}{r}\\---------------- equation (1)

FOR CAR:

ao = \frac{mv^2}{r}\\

where,

ao = centripetal acceleration of the car = ?

m = mass of car = 2000 kg

v = speed of car = vo

r = radius of path

Therefore,

ao = \frac{2000\ vo^2}{r}\\--------------------- equation (2)

Dividing equation (1) by eq(2):

\frac{ac_{suv}}{ao} = \frac{6000}{2000}\\\\ac_{surv} = 3ao

Therefore, the centripetal acceleration of the SUV is <u>3 times</u> ao of the compact car.

8 0
3 years ago
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