576 - Physics Questions Answers

$$\begin{gathered} Impulse is \overrightarrow{Ft} and Power = W/t \\ \overrightarrow{F}=m\overrightarrow{g} and W = mgh \\ Now calculate the time of motion \\ and get the answer \end{gathered}$$

Due to inner sphere attraction, outer sphere contracts so it is compressive stress.$$\begin{gathered} Gravitational force is G\left(\rho 4\pi R^{2}t\right)\left[\pi {(R\theta /2)}^2\right]/4R^2 \\ Outward force due to stress=S\left[2\pi \right(R\theta /2\left)t\right](\theta /2) \\ Now compare. \\ Inform for any issue and wait for video \end{gathered}$$

$$\begin{gathered} Magnetic torque = \overrightarrow{M}\times \overrightarrow{B}=i\overrightarrow{A}\times \overrightarrow{B} \\ Torque due to gravity about the point of \\ circumference = \overrightarrow{R}\times m\overrightarrow{g} \\ Now compare the two \end{gathered}$$Inform for any issue

No horizontal force.

Draw a perpendicular from centre to horizontal plane. Then calculate horizontal distance. 

Now solve. 

If any problem, then inform

$$\begin{gathered} Total flux in 6 faces =\frac{\sigma 4\pi r^2}{{\epsilon }_0} \\ so in 1 face = \frac{1}{6}\frac{\sigma 4\pi r^2}{{\epsilon }_0} \end{gathered}$$if any issue, inform

$$\begin{gathered} According to given condition \\ \frac{d\theta }{dt}=\frac{v\sin 60}{a-(v+v\cos 60)t} \\ Now solve it for t \\ then dis\tan ce = vt \end{gathered}$$solve 

inform for any difficulty