it is the first one y'all
Thermal-energy flow between objects is conserved and always flows from the warmer object to the cooler object.
Here 'conserved' means that the amount of thermal energy lost of by one body is exactly equal to the amount of thermal energy gained by another body, which is the statement of the first law.
According to second law, we do not see objects warming up on their own. For example, if we have a cup of coffee left to itself, we would always see that it cools down. Here, thermal energy is being transferred from warmer object (coffee) to cooler objects (the air in the room).
Answer:
a)
b)
Explanation:
Given that
Initial velocity u =0 m/s
Speed at 5 s v= 282 m/s
Rocket accelerated up to 5 s :
We know that
v= u + at
282= 0+ a x 5
So the acceleration
Rocket come to rest in 1.4 s :
Final velocity of rocket v=0 m/s
Initial velocity = 282 m/s
v= u + at
0= 282 - a x 1.4
So the deceleration
Machine that increases speed, a machine that increases direction of force, and a machine that increases force. A bicycle increases speed, an ax changes direction of force, and a car jack increases force. contrast the scientific definition of work with it's everyday meaning.