Answer:
Explanation:
Given:
- initial speed of the car,
- time taken to realize the need of braking,
<u>Distance travelled during the time span:</u>
Actually the distance travelled before stopping the car will be greater than this distance, because after the application of brakes the car will take some time to come to rest.
Answer:
a) KE = 888.26J
b) N = 294.5 turns
Explanation:
For the kinetic energy:
The inertia is:
So, the kinetic energy will be:
Now, friction force is:
Ff = μ*N = 0.80*5N = 4N
The energy balance would be:
Kf - Ko = Wf where Kf=0; Ko = 888.26J; and Wf is the work done by friction force.
Wf = -Ff*d = -Ff*N*2*π*R where N is the amount of turns it gives.
Replacing these values into the energy balance:
0-888.26=-4*N*2*π*0.12
-888.26=-0.96*π*N
N=294.5 turns
The molar heat of vaporization of a substance is
76.31 kJ/mole
I think 3 but I’m not sure I don’t even know who they are
It's burning fossil fuels because heat and carbon is released when you burn fossil fuels.