# Search results

1. ### Gravitational force on a particle due to different type of objects

Homework Statement A particle is to be placed, in turn, outside four objects, each of mass m: (1) a large uniform solid sphere, (2) a large uniform spherical shell, (3) a small uniform solid sphere, and (4) a small uniform shell. In each situation, the distance between the particle and the...
2. ### Relative motion of the earth and an aeroplane held above the earth's surface

No, that's not what I meant. Let me pose it again. See, the plane is stationary and it is held above the surface of the earth. However, the Earth is rotating with respect to the stationary plane. So, the Earth will move but the plane will be stationary. So, can we expect an another place after...
3. ### Relative motion of the earth and an aeroplane held above the earth's surface

Oh Sorry! The velocity of the plane is relative the Earth's surface.
4. ### Relative motion of the earth and an aeroplane held above the earth's surface

Ok. Let's say the velocity of the plane faster than the rotational speed of the earth. I guess this should be enough.
5. ### Relative motion of the earth and an aeroplane held above the earth's surface

Imagine an Aeroplane held above the Earth's surface for 12 hours, having no contact with the surface of the earth. Suppose that the initial location at time t=0 is Asian continent. So after t = 12 hours, can we expect the aeroplane to be in some other continent or will it be in the same location.
6. ### Career options for someone with a Masters?

Can physicist pursue a career in CFD?? I have completed M.Sc. in Physics with specialization in radio-physics and electronics and working with a nanosemiconductor company as an Engineer-Technical documentation in India. I am interested to pursue a career in computational fluid dynamics and very...

wow, thanks!
8. ### C language

Switch: tests the value of a given variable against a list of case values and when a match is found, a block of statements associated with that case is executed. If Else: If the test value is true, then the true block statements following the if are executed. Now, the point is that I feel...
9. ### C language

What is the difference between switch statement and if statement?
10. ### Significance of current gain in transistors

Voltage source with resistor in series = current source with the same resistor in parallel? Could you please help me understand the explanation behind connecting the resistor in parallel and not in series for transforming the voltage source into the current source?
11. ### Significance of current gain in transistors

Wow, that was great! Absolutely, I got it now.
12. ### Significance of current gain in transistors

But, why higher recombination required for higher bandwidth?
13. ### Significance of current gain in transistors

"For low power transistors (under 1 W), the current gain is typically 100 to 300. High power transistors (over 1 W) usually have current gain of 20 to 100." — Electronic principles by Malvino I want to understand why the current gain is high for low power transistors and why it is low for...
14. ### Can the speed of light be observed to be faster than c?

Well, I don't think light can travel faster than c. Even I had the same question to my professor when I was studying waveguides. There was an equation which could show some situation where light could travel faster than C. But, we all know the basic postulate of relativity.