Chemical reaction produces new substances.
If you can identify substances you look for some differents befor and after. if find then sure there was chemical reaction.
It’s the velocity to the trex then divided by pie to get 8.3
Answer: Option (b) is the correct answer.
Explanation:
Kinetic energy is the energy of an object or particle when it is in motion.
Mathematically, Kinetic energy = 
It is given that toy truck has mass = 0.75 kg, and velocity = 4 m/s.
Calculate the kinetic energy as follows.
Kinetic energy = 
= 
= 
= 
= 
or, Kinetic energy = 6 joules
Thus, we can conclude that kinetic energy of toy truck is 6 J.
Answer:
the answer is letter d because both of them are pushing the couch in the same direction so 4 plus 2 will give you 6N
Answer:
Satellites don't fall from the sky because they are orbiting Earth. Even when satellites are thousands of miles away, Earth's gravity still tugs on them. Gravity--combined with the satellite's momentum from its launch into space--cause the satellite go into orbit above Earth, instead of falling back down to the ground.