V=Vo+at (velocity=initial velocity plus acceleration multiplied by time)
40m/s=25m/s+a(3s)
-25 -25
15m/s=a(3s) divide by 3s on both sides
5m/s^2=a
Proton: symbol P, + 1
neutron: symbol n, 0
Electron: symbol e, -1
Answer:
yes
Explanation:
Water HEATS up and turns into steam. Steam is made from HEAT. Granite can be compromised by HEAT. Lead compounds can be good insulators.
The car's final velocity is 11.6 m/s in the opposite direction.
Work done = 0.5*m*[(v2)^2 - (v1)^2]
where m is mass,
v2 and v1 are the velocities.
Given that m = 1.50 x 10^3 kg, v2 = -15 m/s (decelerates), v1 = 25 kg,
Work done = 0.5 * 1.50 x 10^3 * ((-15)^2 - 25^2) = 3 x 10^5 joules
Just ignore the negative value for the final result because work is a scalar quantity.