## Hunus 3 years ago Question

1. Hunus

"imagine that we hae measured the inertial masses of a proton and an electron, separately, and that we then let them come together to form a hydrogen atom. Is the inertial mass of the atom equal to the sum of the masses of the electron and proton? No; it is a shade less. Why? Because in the formation of the atom with the binding together of the proton and electron, the equivalent of a tiny amount of mass escapes in the form of radiation." Can someone explain why this is?

2. shiwani

how to make graphs of positive and negative accelration

3. Hunus

How do you mean?

4. Hunus

How does one go about constructing an acceleration vs. time graph?

5. shiwani

6. Hunus

What is it that confuses you?

7. shiwani

i dont know

8. Hunus

If you give me an example of what confuses you I will be glad to help

9. shiwani

a ball thrown up and caught back

10. Hunus

And you want to graph the acceleration of the ball?

11. shiwani

yes

12. Hunus

|dw:1330768987896:dw|

13. shiwani

no

14. Hunus

What do you mean no?

15. shiwani

direction of accelration is different when ball goes up and down

16. Hunus

The direction of acceleration due to gravity is always negative. The force of gravity is always pulling the ball back toward earth.

17. shiwani

if acc. is negative so why didnt you plot it in 4th quadrant

18. Hunus

That is the fourth quadrant. I didn't includ the second and third because that would include a negatve value for time.

19. shiwani

ok .

20. shiwani

thank u

21. Hunus

You're welcome. :)