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nirvana33 [79]
3 years ago
5

How many minerals are found in earths crust ?

Physics
2 answers:
Damm [24]3 years ago
5 0
You can find your answer here www.rsc.org/education/teachers/resources/jesei/minerals/students.htm
tensa zangetsu [6.8K]3 years ago
3 0
8 i think....................
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According to the diagram, which color of visible light has the shortest wavelength?
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Answer:

Violet Light

Explanation:

On one end of the spectrum is red light, with the longest wavelength. Blue or violet light has the shortest wavelength. White light is a combination of all colors in the color spectrum. It has all the colors of the rainbow.

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3 years ago
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CN you help me with this question?
qaws [65]
25% i believe because if were talking 50 percent half it would be 25.


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How do you calculate acceleration? acceleration equals distance divided by time. acceleration equals speed multiplied by time. a
expeople1 [14]
Acceleration equals the change in velocity divided by time
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3 years ago
A gray kangaroo can bound across a flat stretch of ground with each jump carrying it 10 m from the takeoff point. you may want t
Stells [14]

<u>Answer:</u>

Takeoff speed of Kangaroo = 12.91 m/s

<u>Explanation:</u>

  The distance reached by Kangaroo =  10 meter

  Angle at which it jumps = 18°

  The motion of Kangaroo is like a projectile, the distance traveled is the range of projectile.

   Range of projectile = Time taken for the projectile to reach ground* Horizontal velocity

   Time taken for the projectile to reach ground:

       Time taken = Two times of the time taken for the projectile to reach maximum height

       Time taken for the projectile to reach maximum height = Vertical speed / Acceleration = u sin θ/g

      Time taken for the projectile to reach ground = 2 u sin θ/g

  So Range of projectile = ucos\theta*\frac{2usin\theta}{g} =\frac{u^2sin2\theta}{g}

 We have Range = 10 meter, θ = 18⁰

    Substituting

        10=\frac{u^2sin(2*18)}{9.8}\\ \\ u^2= 166.73\\ \\ u=12.91 m/s

 Takeoff speed of Kangaroo = 12.91 m/s

3 0
3 years ago
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A student ran 60 meters in 1 minute. Calculate the speed. Provide your answer in meters per second.
Elena-2011 [213]

Answer:

Speed, S = 0.5m/s

Explanation:

Given the following data;

Distance = 30 meters

Time = 1 minute = 60 seconds

To find the speed;

Speed can be defined as distance covered per unit time. Speed is a scalar quantity and as such it has magnitude but no direction.

Mathematically, speed is given by the equation;

Speed = \frac{distance}{time}

Substituting into the above formula;

S = \frac{30}{60}

Speed, S = 0.5m/s

5 0
3 years ago
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