Answer: ![N43.2](https://tex.z-dn.net/?f=N43.2)
Explanation:
Given
Power consumption of bulb and water are
and ![240\ W](https://tex.z-dn.net/?f=240%5C%20W)
If the Devices are on for four hours
Total power of devices ![60+240=300\ W](https://tex.z-dn.net/?f=60%2B240%3D300%5C%20W)
Energy consumed for 4 hours is
![\Rightarrow 300\times 4=1200 Wh\\\Rightarrow 1.2\ kWh](https://tex.z-dn.net/?f=%5CRightarrow%20300%5Ctimes%204%3D1200%20Wh%5C%5C%5CRightarrow%201.2%5C%20kWh)
For 30 days it is ![1.2\times 30=36\ kWh](https://tex.z-dn.net/?f=1.2%5Ctimes%2030%3D36%5C%20kWh)
Cost for 30 days ![36\times 1.2=43.2\ N](https://tex.z-dn.net/?f=36%5Ctimes%201.2%3D43.2%5C%20N)
Answer: 2.5
Explanation:
The mass of bullet = 20kg
The momentum of the bullet = 10kg m/s
The kinetic energy of this bullet in Kj will be calculated as:
= p² / 2m
= 10² /(2 × 20)
= (10 × 10) /(2 × 20)
= 100/40
= 2.5
Therefore, the correct option is C.
Answer:
C
Explanation:
Rocks with hotter temperatures sank to the bottom of the Earth. The rocks with the hottest temperature became the core and the rocks with the least amount of heat became the crust.
Hope this helps!
The solar interior includes the core, radiative zone and convective zone. The photosphere is the visible surface of the Sun.
So the answers should be:
<u>A) Photosphere C) Core D) Radioactive zone </u>and<u> F) Convective zone.</u>
I hope this helps. Sorry if I made any mistakes. :)