A black hole is a cosmological object that is created when a massive star comes to the end of its life and collapses under its own gravity. Black holes have massive gravitational fields that even light cannot escape beyond a certain distance. Before being engulfed, matter that is pulled into a black hole should become very hot and emit electromagnetic radiation.
Answer: Option (C) is the correct answer.
Explanation:
As we know that metals are able to conduct electricity so, when a negatively charges rod is kept closer to the left sphere then electrons will enter the sphere.
Since, like charges repel each other. Hence, some of the negative changes from the rod will repel the negative charges of left sphere.
As both left and right spheres are touching each other so, the electrons will move towards the right sphere. As a result, there will be too many electrons (negative charge) present on the right sphere and very less electrons present in the left sphere.
Thus, we can conclude that the statement right sphere is negatively charged, another is charged positively, is true.
Here
- Acceleration and initial velocities are constant.
According to first equation of kinematics.
![\\ \sf\longmapsto v=u+at](https://tex.z-dn.net/?f=%5C%5C%20%5Csf%5Clongmapsto%20v%3Du%2Bat)
![\\ \sf\longmapsto v=0+at](https://tex.z-dn.net/?f=%5C%5C%20%5Csf%5Clongmapsto%20v%3D0%2Bat)
![\\ \sf\longmapsto v=at](https://tex.z-dn.net/?f=%5C%5C%20%5Csf%5Clongmapsto%20v%3Dat)
![\\ \sf\longmapsto v\propto t](https://tex.z-dn.net/?f=%5C%5C%20%5Csf%5Clongmapsto%20v%5Cpropto%20t)
- Time was t at velocity v
- Time will be 4t at velocity 4v
Answer:
Option C
Explanation:
From the question we are told that:
Mass ![m=0.015kg](https://tex.z-dn.net/?f=m%3D0.015kg)
Radius ![r=0.5m](https://tex.z-dn.net/?f=r%3D0.5m)
Time ![t=0.70](https://tex.z-dn.net/?f=t%3D0.70)
Generally the equation for Tension is mathematically given by
![T=\frac{4mr}{t^2} \pi](https://tex.z-dn.net/?f=T%3D%5Cfrac%7B4mr%7D%7Bt%5E2%7D%20%5Cpi)
![T=\frac{4*0.015*0.5}{(0.70)^2} (3.142)](https://tex.z-dn.net/?f=T%3D%5Cfrac%7B4%2A0.015%2A0.5%7D%7B%280.70%29%5E2%7D%20%283.142%29)
![T=0.60N](https://tex.z-dn.net/?f=T%3D0.60N)
Therefore
, toward the center of the circle
Option C