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morpeh [17]
3 years ago
7

two cars collide at an intersection. one car has a mass of 1600 kg and is moving 8 m/s to the north, while the other has a mass

of 1400 kg and is moving 12 m/s to the south. what is the combined momentum?
Physics
1 answer:
vampirchik [111]3 years ago
3 0

Answer:

Combined momentum = 12,000 Kgm/s

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Calculate the force between two small charged spheres having charges of 3×10−7 C and 4×10−7 C placed 20 cm apart.
xxMikexx [17]

Answer:

27 . 10^-7 or 27/1000

Explanation:

We use the Coulomb Law

k = Coloumb Constant

q1 and q2 are the charges

d is the distance between the spheres

3 0
3 years ago
A bodybuilder loads a bar with 550 Newtons (~125 pounds) of weight and pushes the bar over her head 10 times. Each time she lift
mafiozo [28]

Work = (force) x (distance)

Each time she lifts the weight, she does

          (550 N) x (0.5 m) = 275 joules of work against gravity.

Each time she lets the bar down gently, gravity does

          (550 N) x (0.5 m) = 275 joules of work against her muscles. 

If the human physical muscular system were 100% efficient, and capable
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exactly zero work in the process of 1-up followed by 1-down.


3 0
3 years ago
Read 2 more answers
What is electricity?
igor_vitrenko [27]
A form of energy resulting from the existence of charged particles (such as electrons or protons), either statically as an accumulation of charge or dynamically as a current.
5 0
3 years ago
A car slows down from speed of 72
Nastasia [14]

Explanation:

Given parameters:

Initial velocity = 72km/hr

Final velocity  = 0km/hr

Time taken  = 25s

Unknown:

Acceleration = ?

Solution:

To solve this problem, convert km/hr to m/s;

           1000m = 1km

           3600s = 1hr

  72km/hr;

          1km/hr  = 0.278m/s

         72km/hr = 0.278 x 72  = 20.02m/s

Acceleration is the change in velocity divided by the time taken;

       Acceleration = \frac{final velocity - initial velocity }{time}  

       Acceleration  = \frac{0 - 20.02}{25}   = -0.8m/s

The car  is actually decelerating at a rate of 0.8m/s

5 0
3 years ago
How does freezing and evaporation affect salinity?
Gnoma [55]
The answer is C, because the water molecules are evaporating and the salt molecules are staying the same.
8 0
3 years ago
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