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jeka57 [31]
3 years ago
12

Which type of border shows the division between Sonora and Chihuahua?

Physics
1 answer:
KonstantinChe [14]3 years ago
7 0
The answer is the national border
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When can hfc-134a become combustible in a mobile air conditioning system?
zubka84 [21]
The  mixture  of  HFc-134a with  high  concentration  of  air  at  raised  pressure    can  become  combustible  in  presence  of  a  ignition  source,  that  is  oxygen  enriched  environment.Thus  at  high  pressure  in a mobile  air  condition   led   to   combustible  of HFC-134a.
3 0
4 years ago
Mrs. Brown's class is studying magnets and electricity. At the end of the unit Claire states that magnets and electricity are bo
Gwar [14]

Answer:

Magnets can create electricity and electricity can create a magnetic force.

Both electric charges and magnets do not have to touch an object in order to exert a force on it.

Electromagnets use electricity to create a magnetic force.

Explanation:

7 0
3 years ago
Read 2 more answers
A Ferris wheel has radius 5.0 m and makes one revolution every 8.0 s with uniform rotation. A person who normally weighs 670 N i
DaniilM [7]

Answer:

The apparent weight of the person as she pass the highest point is  N  =  458.8 \ N

Explanation:

From the question we are told that

   The radius of the Ferris wheel is r = 5.0 \ m

    The period of revolution is T = 8.0 \ s

     The weight of the person is  W  =  670 \ N

   

Generally the speed of the wheel is mathematically represented as

      v =  \frac{2 \pi r}{T }

substituting values

      v =  \frac{2 * 3.142 *  5}{8 }

       v =  3.9 3 \ m/s

The apparent weight (the normal force exerted on her by the bench) at the highest point is mathematically evaluated as

          N  =  mg  - \frac{mv^2}{r}

Where m is the mass of the person which is mathematically evaluated as

     m =  \frac{W}{g}

substituting values

    m =  \frac{670}{9.8}

    m =  68.37 \ kg

So

    N  =  68.37 * 9.8   - \frac{68.37 * {3.93}^2}{5}

    N  =  458.8 \ N

5 0
3 years ago
Q. No. 9 A body falls freely from the top of a tower and during the last second of its fall, it falls through 25m. Find the heig
HACTEHA [7]

Answer:

45.6m

Explanation:

The equation for the position y of an object in free fall is:

y=-\frac{1}{2} gt^2+v_0t+y_0

With the given values in the question the equation has one unknown v₀:

v_0=\frac{y-y_0}{t}+\frac{1}{2}gt

Solving for t=1:

1) v_0=y-y_0+\frac{g}{2}

To find the hight of the tower you can use the concept of energy conservation:

The energy of the body 1 sec before it hits the ground:

2) E=\frac{1}{2}m{v_0}^2+mgy_0

If h is the height of the tower, the energy on top of the tower:

3) E=mgh

Combining equation 2 and 3 and solving for h:

4) h=\frac{{v_0}^2}{2g}+y_0

Combining equation 1 and 4:

h=\frac{{(y-y_0+\frac{g}{2}})^2}{2g}+y_0

4 0
3 years ago
Some people say it is rare to get HIV from a blood transfusion in the United States. True or false? Why?
iragen [17]

Answer:

False

Explanation:

Because there is a 90% chance of contracting HIV from a blood transfusion

8 0
3 years ago
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