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gregori [183]
3 years ago
9

What is meant by black hole ?​

Physics
2 answers:
Xelga [282]3 years ago
8 0

Answer:

<h2>A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying. Because no light can get out, people can't see black holes</h2>

Explanation:

<h2><u>PLEASE</u><u> </u><u>MARK</u><u> ME</u><u> BRAINLIEST</u><u> AND</u><u> FOLLOW</u><u> M</u><u> E</u><u> LOTS</u><u> OF</u><u> LOVE</u><u> FROM</u><u> MY</u><u> HEART</u><u> AND</u><u> SOUL</u><u> DARLING</u><u> TEJASWI</u><u> HERE</u><u> ❤️</u></h2>
guapka [62]3 years ago
3 0

Answer:

A black hole is a region of space having a gravitational field so intense that no matter or radiation can escape.

Explanation:

Sorry if this isn't what you meant or were looking for.

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When a wire with a current is placed in a magnetic field, electrical energy is transformed into mechanical energy
babymother [125]

Answer:

TRUE

Explanation:

When a wire with a current is placed in a magnetic field, electrical energy is transformed into mechanical energy. The transformation happens when the magnetic field produced by the current causes the wire to move.

8 0
3 years ago
4.A balloon containing an ideal gas sits in a constant pressure chamber. The temperature of the chamber is raised from 275 K to
Natalka [10]

To solve this problem, we must take into account the equation:

PV=nRT

So, for an isobaric transformation (constant pressure), an increase in volume generates an increase in temperature. This can be written as:

\frac{V_1}{T_1}=\frac{V_2}{T_2}\frac{0.03}{275}=\frac{V_2}{375}\Rightarrow V_2=\frac{0.03*375}{275}=0.04091m^3

Thus, the new volume will be 0.04091m^3

8 0
1 year ago
You attach a cart with a mass of 0.92 kg to a spring and compress the cart-
Artyom0805 [142]

Answer:

F = - K X     force exerted by compressed spring

F X = 1/2 M V^2    energy (work) required to produce a speed V for mass M

K X * X  = 1/2 M V^2      direction of F is the same as that of V

X^2 = M V^2 / K      combining  terms

X = (M / K)^1/2 V      

X = (.92 / 130)^1/2 * 1.4 = .118 m

8 0
3 years ago
A photovoltaic array of (solar cells) is 10.0% efficient in gathering solar energy and converting it to electricity. show answer
FromTheMoon [43]

Answer:

A = 1.056\,m^{2}

Explanation:

The portion of solar energy converted into electric energy is given by the following equation:

\dot E = \eta \cdot I\cdot A

The area needed to produce energy is derived by clearing the corresponding variable:

A = \frac{\dot E}{\eta \cdot I}

A = \frac{75\,W }{(0.1)\cdot (710\,\frac{W}{m^{2}} )}

A = 1.056\,m^{2}

4 0
4 years ago
If you touched a down power line what could occur
sertanlavr [38]

I believe you'd get electrocuted...


4 0
3 years ago
Read 2 more answers
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