Answer:
the only thing thats confusing me is no ?
Explanation:
please explain thank you :)
Answer:
400kj
Explanation:
h =mass × specific heat capacity × change in temperature
= 2×2000×[120-20]
=2×2000×100
=400000j
=400kj
Answer:

Explanation:
It is given that,
Force, 
Force, 
We need to find the force F₃ that must act on the object so that the sum of the forces is zero. Let 
According to question, 


Since, 12 + x = 0, 11 + y = 0 and 10 + z = 0
The third force is equal to,

Hence, this is the required solution.
here acceleration initially is given as 2 m/s/s for total time of 10 s
so in above situation the final speed will be 20 m/s
now here if acceleration is double as well as the time is also double
so now we will have


so now the final speed is given as


I hope that the attachment helps you..