The atomic mass of an element is the sum of its protons and neutrons. If the element has 8 protons and 9 neutrons, then its atomic mass is 8+9 which is equal to 17. The correct answer is 17.
Answer:
Explanation:
The relation between electric field and potential difference is as follows
E = - dV / dr
That means if dV is positive , E is negative . In other words , if potential increases , E is negative or in opposite direction in which potential increases .
Here the electric potential increases uniformly from east to west , that means electric field is from west to east . Since potential is uniformly increasing that means
dV / dr = constant
E = constant
Electric field is constant .
So the option which is correct is
" points east and does not vary with position " .
<h2><u>AnswEr :</u> </h2>
Given that,
- Mass of the Book (M) = 3.3 Kg
- Gravitational Potential Energy (P) = 57 J
- Acceleration Due to Gravity (g) = 9.8 m/s²
We have to find the height of the shelf
We know that,
Putting the values,
<h3>The height of the shelf is 1.76 m </h3>
Answer:
Temperature at which the resistance is twice the resistance at is
Solution:
As per the question:
Temperature coefficient,
Reference temperature,
Resistance,
Now, using the formula:
- Yes, this temperature holds for all all the conductors of copper, irrespective of the size and shape of the conductor.