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hram777 [196]
3 years ago
9

Mr.maxwell, an english teacher, thinks all the sudents in the class who play sports are lazy

Physics
2 answers:
aivan3 [116]3 years ago
8 0
What’s the question supposed to be
ValentinkaMS [17]3 years ago
4 0
Slap em Bc they not supposed to me sleeping in her class and that’s on period
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A laser on the South American plate takes a certain amount of time to reach a satellite and bounce back to Earth. Five years lat
tigry1 [53]
I think the answer is B but the problem in this part is that the South American plate has moved over time. You see the difference?
3 0
3 years ago
Read 2 more answers
What percent of earth's density does Jupiter have?
Ivan
Density of Earth: 5.514 g/cm³
Density of Jupiter: <span>1.326 g/cm³

1.326 g/cm³ / 5.514 g/cm³ </span>≈ <span>0,24
0,24 * 100 = 24%

Jupiter has 24% of earth's density.

(Density numbers are from internet, you may calculate with your own ones if u have )</span>
3 0
3 years ago
A 2.00 m wave has a frequency of 686 Hz. What is the speed of the wave?
qwelly [4]
Wave speed = frequency * wavelength
Wave speed = 686 * 2.00
Wave speed = 1,372 (m/s)
4 0
3 years ago
A 50 mm diameter steel shaft and a 100 mm long steel cylindrical bushing with an outer diameter of 70 mm have been incorrectly s
BARSIC [14]

Answer:

The axial force is  P =  15.93 k N

Explanation:

From the question we are told that

     The diameter of the shaft steel is  d =  50mm

      The length of the cylindrical bushing  L =100mm

     The outer diameter of the cylindrical bushing  is  D =  70 \ mm

       The diametral interference is \delta _d = 0.005 mm

       The coefficient of friction is  \mu = 0.2

       The Young modulus of  steel is  207 *10^{3} MPa (N/mm^2)

The diametral interference is mathematically represented as

           \delta_d = \frac{2 *d * P_B * D^2}{E (D^2 -d^2)}

Where P_B is the pressure (stress) on the two object held together  

     So making P_B the subject

            P_B = \frac{\delta _d E (D^2 - d^2)}{2 * d* D^2}

Substituting values

                P_B = \frac{(0.005) (207 *10^{3} ) * (70^2 - 50^2))}{2 * (50) (70) ^2 }

                 P_B = 5.069 MPa

Now he axial force required is

             P =  \mu * P_B * A

Where A is the area which is mathematically evaluated as

               \pi d l

So   P  =  \mu P_B \pi d l

Substituting values

      P =  0.2 * 5.069 * 3.142 * 50 * 100

       P =  15.93 k N

8 0
3 years ago
No links plz!!
Pavlova-9 [17]

Answer:

Light

Explanation:

The way a concave mirror works is that since it's concave, the light bounces off of each other. a convex mirror, it curved the opposite, and the mirror has no way to bounce off of itself.

6 0
2 years ago
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