Answer:
20.4m
Explanation:
72kmhr(1000mkm)(hr3600sec)=20ms
Use principles of conservation of energy.
The initial kinetic energy of the car is equal to the work done by friction during braking:
KE=Wfric
12mv2=(Ffric)d
but the force of friction = weight of the car = mg
12mv2=mgd
mass cancels in both terms, which tells us the answer is independent of mass
12v2=gd
12202=(9.81)d
d=20.4m
Note that the correct answer should actually be 20. m with only 2 significant figure accuracy since 72 km/hr only has 2 sig fig accuracy.
Answer:
is a double displacement reaction
- is a redox reaction
- is a combination reaction
- is a decomposition reaction
Explanation:
It is of the form
Both oxidation and reduction occur in this reaction. Fe gets oxidized and H gets reduced.
It is an exothermic combination reaction. Calcium reacts with water to produce calcium hydroxide and heat is released in this process.
It is a decomposition reaction where nickel chloride decomposes to nickel and chlorine.
Answer:
41 turns
Explanation:
= Induced emf = 12.4 mV
= Current changing rate = 0.0275 A/s
L= Inductance
= Average flux = 0.00285 wb
N = Number of turns
Change in flux is given by
Flux through each turn is given by
The number of turns is 41
Answer:
2.5
That is my guess sorry if i get it wrong.
Answer:
I don't think that you would pass the class.
Explanation:
Because you almost have as much failing marks as passing marks, if you could weren't as absent and you had more passing than failing marks than you would pass, in this case you wouldn't.