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AleksAgata [21]
3 years ago
15

What conditions must be met if a man-made satellite is to attain a circular orbit around the earth?(choose as many as apply)

Physics
1 answer:
Hunter-Best [27]3 years ago
5 0
<span>C) It must be launched with a tangential speed greater than 8 km/s.</span>
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If a neutral material like fur is rubbed on another neutral object like a rubber ball what is the resulting charges of the objec
alexdok [17]

Answer:

b

Explanation:

they both have a neutral charge so they couldn't be positive or negative since that wouldn't come from anywhere

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3. A certain wire, 3 m long, stretches by 1.2 mm when under tension of 200 N. By how much does
nikitadnepr [17]

Answer:

The extension of the second wire is   e_2 = 0.0024 \  m =  2.4 mm

Explanation:

From the question we are told that

    The length of the wire is L  = 3 \ m

     The elongation of the wire is  e =  1.2mm =  \frac{1.2}{1000} =  0.0012 m

        The tension is F  =  200 \ N

       The length of the second wire is  L_2   =  6 \ m

     

Generally the Young's modulus(Y) of this material is  

        Y  = \frac{stress}{strain }

Where stress =  \frac{F}{A}

    Where A is the area which is evaluated as  

           A = \pi r^2

  and   strain = \frac{extention}{length} =  \frac{e}{L}

   So

        Y  = \frac{\frac{F}{\pi r^2 } }{ \frac{e}{L}  }

Since the wire are of the same material Young's modulus(Y)  is constant

So we have  

              \frac{F * L }{r^2 e}  =  \pi * Y = constant

              F * L   =  constant   * r^2 e

Now the ration between the first and the second wire is

         \frac{F_1}{F_2}  * \frac{L_1}{L_2} =  \frac{r*2_1}{r^2}  *  \frac{e_1}{e_2}

Since tension , radius are constant

   We have

           \frac{L_1}{L_2} =   \frac{e_1}{e_2}

substituting values

          \frac{3}{6} =   \frac{0.0012}{e_2}

          0.5 e_2 =  0.0012

         e_2 = \frac{ 0.0012  }{0.5}

          e_2 = 0.0024 \  m =  2.4 mm

3 0
4 years ago
Which of the following exerts the strongest gravitational force on Earth?<br> (Need help)
jarptica [38.1K]

Answer:

Moon

Explanation:

although the moon is by far the smallest mass of the listed bodies, it is also by  far the closest.

6 0
3 years ago
The maximum current output of a 60 Ω circuit is 11 A. What is the rms voltage of the circuit?
ICE Princess25 [194]

Answer:

660V

Explanation:

V=IR

V=?,I=11A,R=60w

V=60×11

=660V

3 0
3 years ago
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