Answer:
The answer is first one 1...
The water density is

And the mass of 1.40 L of water is

The amount of heat needed to increase the temperature of the water by

is given by

where m is the water mass,

is the water specific heat capacity and
is the increase in temperature. If we substitute these numbers into the equation, we find
Answer:
B
Explanation:
Use conservation of momentum: Total momentum of the system before is the same as the total momentum after the collision. Since both are moving north, the momentum of both cars is in the same direction, and the total momentum before collision is 1000kg*20m/s + 1500kg*36m/s = 74000kg-m/s.
This is the same amount of momentum after collision, and since they are locked together, their mass is added. The velocity can be found by: 74000kg-m/s ÷ 2500kg = 29.6m/s.
momentum = mass*velocity
Your eyes send images to your brain. It is hard to explain for me but your eyes are a big role in helping.
Hope this helps :)
Answer: car 1 is going how fast
Explanation: no need to answer without speed I won't know distance.