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zysi [14]
4 years ago
15

When two objects collide, they exert forces on each other that change momentum

Physics
1 answer:
NikAS [45]4 years ago
6 0
A. law of conservation of momentum
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-- If the four light bulbs are in <u><em>series</em></u>, then the total resistance becomes <em>four times as much</em> as it was with a single bulb, because now, the current has to push through one light bulb four times.

-- If the four light bulbs are in <u><em>parallel</em></u>, then the total resistance becomes <em>1/4 as much</em> as it was with a single bulb, because now, the current can split up into four equal streams, and each stream only has to push through a single light bulb.  

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The United States has a_____ economy
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Answer:

C

Explanation:

The United States has a mixed economy it works according to economic system that features characteristics in both capitalism and socialism it makes economy system protects some private properties and allows a level of economic freedom in the use of capital

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True or False: Objects fall at a constant speed.
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3 years ago
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PLEASE HELP!
lana66690 [7]

Answer:

x = 4.32 [m]

Explanation:

We must divide this problem into three parts, in the first part we must use Newton's second law which tells us that the force is equal to the product of mass by acceleration.

∑F = m*a

where:

F = force = 700 [N]

m = mass = 2030 [kg]

a = acceleration [m/s²]

Now replacing:

F=m*a\\700=2030*a\\a = 0.344[m/s^{2}]

Then we can determine the final speed using the principle of conservation of momentum and amount of movement.

(m_{1}*v_{1})+Imp_{1-2}=(m_{1}*v_{2})

where:

m₁ = mass of the car = 2030 [kg]

v₁ = velocity at the initial moment = 0 (the car starts from rest)

Imp₁₋₂ = The impulse or momentum (force by the time)

v₂ = final velocity after the impulse [m/s]

(2030*0) + (700*5)=(2030*v_{2})\\3500 = 2030*v_{2}\\v_{2}=1.72[m/s]

Now using the following equation of kinematics, we can determine the distance traveled.

v_{2}^{2} =v_{1}^{2}+2*a*x

where:

v₂ = final velocity = 1.72 [m/s]

v₁ = initial velocity = 0

a = acceleration = 0.344 [m/s²]

x = distance [m]

1.72^{2}=0^{2} +(2*0.344*x) \\2.97 = 0.688*x\\x = 4.32 [m]

8 0
3 years ago
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