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zvonat [6]
3 years ago
5

I’m stuck in B and D. which one is it?

Physics
2 answers:
Varvara68 [4.7K]3 years ago
8 0

<u>A</u><u>n</u><u>s</u><u>w</u><u>e</u><u>r</u><u>:</u>

Option b is correct - Rocky, nearly continuous, found on earth surface.

The reason is <u>i</u><u>t</u><u> </u><u>i</u><u>s</u><u> </u><u>t</u><u>h</u><u>e</u><u> </u><u>r</u><u>o</u><u>c</u><u>k</u><u>y</u><u> </u><u>s</u><u>u</u><u>r</u><u>f</u><u>a</u><u>c</u><u>e</u><u> </u><u>a</u><u>r</u><u>e</u><u>a</u><u> </u><u>c</u><u>o</u><u>m</u><u>p</u><u>o</u><u>s</u><u>e</u><u>d</u><u> </u><u>o</u><u>f</u><u> </u><u>c</u><u>r</u><u>u</u><u>s</u><u>t</u><u> </u><u>a</u><u>n</u><u>d</u><u> </u><u>u</u><u>p</u><u>p</u><u>e</u><u>r</u><u> </u><u>m</u><u>a</u><u>n</u><u>t</u><u>l</u><u>e</u><u> </u><u>p</u><u>a</u><u>r</u><u>t</u><u>.</u><u> </u><u>B</u><u>a</u><u>s</u><u>i</u><u>c</u><u>a</u><u>l</u><u>l</u><u>y</u><u>,</u><u> </u><u>i</u><u>t</u><u> </u><u>i</u><u>s</u><u> </u><u>t</u><u>h</u><u>e</u><u> </u><u>o</u><u>u</u><u>t</u><u>e</u><u>r</u><u> </u><u>s</u><u>h</u><u>e</u><u>l</u><u>l</u><u> </u><u>o</u><u>f</u><u> </u><u>e</u><u>a</u><u>r</u><u>t</u><u>h</u><u>.</u>

tatuchka [14]3 years ago
6 0
It is b! the lithosphere is the crust and upper mantle
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How much heat would be needed to completely evaporate 31.5 g of boiling water at a temperature of 100 "C? Express your answer in
BaLLatris [955]

Answer:

Heat needed = 71.19 J

Explanation:

Here heat required can be calculated by the formula

            H = mL

M is the mass of water and L is the latent heat of vaporization.

Mass of water, m = 31.5 g = 0.0315 kg

Latent heat of vaporization of water = 2260 kJ/kg

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            H = mL = 0.0315 x 2260 = 71.19 kJ

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What are the first two steps for finding the magnitude of the resultant vector?
Marina86 [1]

Answer:

In the analytical method,

  1. Resolve the vectors into the perpendicular components of the Cartesian coordinates.
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Explanation:

  • There are two methods to find the magnitude of the resultant vector.
  • One is the geometrical method and the other one is the analytical method.
  • In the geometrical method, all the vectors are connected the head to tail with the appropriate magnitude and the resultant vector is obtained by joining the initial point and the final point by a vector in the reverse direction. The magnitude of the resultant vector is given by the length of the line.
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8 0
3 years ago
g A hydraulic press has a safety feature which consists of a hydraulic cylinder with a piston at one end and a safety valve at t
nlexa [21]

Answer:

58.32 N

Explanation:

Area of a circle = \pir^{2}

where r is the radius of the circle.

The cylinder has a radius of 0.02 m, its area is;

A_{1} = \pir^{2}

  = \frac{22}{7} x (0.02)^{2}

  = \frac{22}{7} x 0.0004

  = 1.2571 x 10^{-3}

Area of the cylinder is 0.0013 m^{2}.

The safety valve has a radius of 0.0075 m, its area is;

A_{2} = \pir^{2}

    = \frac{22}{7} x (0.0075)^{2}

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    = 1.7679 x 10^{-4}

Area of the valve is 0.00018 m^{2}.

From Hooke's law, the force on the safety valve can be determined by;

F = ke

F_{2}  = 950 x 0.0085

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Minimum force, F_{1}, required can be determined by;

\frac{F_{1} }{A_{1} } = \frac{F_{2} }{A_{2} }

\frac{F_{1} }{0.0013} = \frac{8.075}{0.00018}

F_{1} = \frac{0.0013 *8.075}{0.00018}

    = 58.32

The minimum force that must be exerted on the piston is 58.32 N.

8 0
3 years ago
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