D.Both B and C
As they not allow heat to pass through and usually non metal
Answer:
Gravitational field strength =weight/mass
Explanation:
14.8N/4.0kg
3.7N/kg
Carbon 6 hydrogen 12 oxygen 6
Hope this helped!
Answer:
We can easily find out the beginning point of the line by using dot representation. When it comes to position vector, it expresses the exact position of certain object from the starting point of the coordinate system. The vector is a straight line that has a certain end which is fixed to its body.
Answer:
The time is 
Explanation:
Given that,
Number of energy level n= 1
Energy E₁=4 eV
We need to calculate the time period
Using formula of time period


Where, E = energy

h = Planck constant
Put the value into the formula



Hence, The time is 