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Annette [7]
4 years ago
6

What is the mystery behind black hole​

Physics
2 answers:
lisabon 2012 [21]4 years ago
5 0

Well since the gravitational pull is so strong, nothing can escape from it which means we haven't been able to get close enough to really know everything about them. There's no way of knowing what truly goes on inside of them since there is no way out.

muminat4 years ago
3 0

Answer:

A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.

Explanation:

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A 4300-N force from a car's engines produces an acceleration of 3.3 m/s2. What is the mass of the car?
sertanlavr [38]

Answer:The net force acting on the car is 3×103 Newtons

Explanation:

5 0
3 years ago
What is the speed of a walking person in m/s if the person travels 1000 m in 20 minutes?
Nata [24]

Answer:

0.83m/s

Explanation:

Given parameters:

distance  = 1000m

time taken  = 20min

Unknown:

Speed of the walking person  = ?

Solution:

To solve this problem;

    Speed  = \frac{distance}{time taken}

  Time taken should be in seconds;

                 1 min   =  60s

                 20min  = 20 x 60  = 1200s

Speed  = \frac{1000}{1200}   = 0.83m/s

8 0
3 years ago
Forces are measured in Newtons (N). Why are forces considered to be vectors?
prohojiy [21]

Answer:

A force has both magnitude and direction, therefore: Force is a vector quantity; its units are newtons, N. Forces can cause motion; alternatively forces can act to keep (an) object(s) at rest. ... Consider two forces of magnitudes 5 N and 7 N acting on a particle, with an angle of 90◦ between them.

Explanation:

from google

8 0
3 years ago
A submarine deep underwater releases a bubble of air. The total pressure at this depth is P. The bubble has diameter, D, and abs
Sunny_sXe [5.5K]

Answer:

P V = n R T      ideal gas equation

P2 V2 / P1 V1 = T2 / T1    

V2 / V1 = T2 / T1 * P1 / P2 = T2 P1 / (T1 P2)

V2 / V1 = (1.17 T1) / T1 * (P1 / .22 P1)      assuming absolute temp as 1.17 P1

V2 / V1 = 1.17 / .22 = 5.32

V = 4/3 pi R^3 = 4/3 pi (D/2)^3 = 4/3 pi D^3 / 8 = pi D^3 / 6

V2 / V1 = D2^3 / D1^3

D2 = (V2 / V1 * D1^3)^1/3

D2 = 5.32^1/3 * D = 1.75 D      (D1 = D)

7 0
3 years ago
Which one is true ?????
maria [59]

Answer:

b. horizontal distance/time graph

Explanation:

d is incorrect because object is moving at the same pace the entire time

7 0
3 years ago
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