Answer:
because on an interstate or freeway, the car is cruising at a constant speed, without speeding up, slowing down, stopping, or turning constantly. In a city, cars constantly have to stop, slow down, speed up, which burns more gas in a shorter period of time
Explanation:
Answer:
s₁ = 4.67 m from car A
Explanation:
Since, the cars are moving at a constant speed. Hence, we will apply the equation for uniform motion here:
s = vt
where,
s = distance covered
v = velocity
t = time taken
For Car A:
s₁ = (1.4 m/s)t
For Car B:
s₂ = (2.2 m/s)t
Because the time will be same at the collision. At collision the distance covered by Car A and Car B must be 12 m altogether. Hence:
s₁ + s₂ = 12 m
using values:
(1.4 m/s)t + (2.2 m/s)t = 12 m
t = 12 m/3.6 m/s
t = 3.333 s
Substitute this in the equation of s₁:
s₁ = (1.4 m/s)(3.33 s)
<u>s₁ = 4.67 m from car A</u>
This reaction would be classified as a double displacement or replacement reaction. This is because the atoms/groups of atoms within each compound are swapped or have broken bonds and reformed with other atoms/groups, where each of them has been replaced with their counter metal or nonmetal in the equation.
The potential energy of the object is 78.4 J
Explanation:
The gravitational potential energy (GPE) of an object is the energy possessed by the object due to its position in a gravitational field.
For an object near the Earth's surface, the GPE is given by:
where
m is the mass of the object
is the acceleration of gravity near the Earth's surface
h is the height of the object relative to the surface
For the object in this problem,
m = 2 kg
h = 4 m
Substituting, we find its GPE:
Learn more about potential energy:
brainly.com/question/1198647
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might be option D is the answer.
