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kherson [118]
3 years ago
14

When the posted speed limit is 70 mph, the minimum speed limit is ___________ mph.

Physics
2 answers:
Alisiya [41]3 years ago
7 0

Answer:

50 mph

Explanation:

The maximum speed limit is the speed that one drives without over-speeding, that is, breaking the law. The maximum speed limit varies from area to area.

In the streets, the minimum speed, and at times the maximum speed is 40 mph. This is because the areas are residential areas which have people and pets moving.

In highways, the minimum speed can be 50 mph. This is because it is generally safe to drive at those speeds without the risk of a pedestrian-related accident.

Therefore, minimum speed of 50 mph are permissible in highways.

boyakko [2]3 years ago
6 0
Because driving to slow that you block other vehicles is illegal when the posted speed limit is 70 mph, the minimum speed limit is 50 mph
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3 years ago
What's the difference in a balanced force in an unbalanced force
AlekseyPX

There's no such thing as one balanced force or one unbalanced force.

If ALL of the forces in a GROUP of forces acting on the same object
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If they don't, then the GROUP of forces is unbalanced.

Two or more forces can be balanced or unbalanced.
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3 years ago
Density of copper is 8.96 g/cm3and density of zinc is 7.14 g/cm3. Brass is an alloy made of copper and zinc. You are given a sam
kvasek [131]

Answer:

The material cost for making one ton of the brass sample that I have is $8149.04.

Explanation:

Density of copper = 8.96 g/cm^3 = 8.96×10^-3 kg/cm^3

Price of copper = $6.13/kg

Price of copper per volume = 8.96×10^-3 kg/cm^3 × $6.13/kg = $0.0549/cm^3

Density of zinc = 7.14 g/cm^3 = 7.14×10^-3 kg/cm^3

Price of zinc = $1.8/kg

Price of zinc per volume = 7.14×10^-3 kg/cm^3 × $1.8/kg = $0.0129/cm^3

Price of brass per volume = 0.0549 + 0.0129 = $0.0678/cm^3

Density of brass I have is 8.32 g/cm^3 = 8.32 g/cm^3 × 1 kg/1000 g × 1 ton/1000 kg = 8.32×10^-6 ton/cm^3

Price = $0.0678/cm^3 ÷ 8.32×10^-6 ton/cm^3 = $8149.04/ton

5 0
3 years ago
Read 2 more answers
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ohaa [14]

Answer:

157.8 J

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h = height difference in top and bottom of the incline = 2.3 m

g = acceleration due to gravity = 9.8 m/s²

TE = Total Energy at the bottom

PE = Gravitational potential energy at the top

Using conservation of energy

Total Energy at the bottom = Gravitational potential energy at the top  

TE = PE

TE = m g h

TE = (7) (9.8) (2.3)

TE = 157.8 J

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3 years ago
Question 1 and 2 and 3 physics lesson homework
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Answer:

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