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3 years ago

Which of these is formed by a hot spot in Earth's crust?

Physics

2 answers:

Alexxx [7]3 years ago

7 0

Answer:

A hot spot is a region deep within the Earth's mantle from which heat rises through the process of convection. This heat facilitates the melting of rock. The melted rock, known as magma, often pushes through cracks in the crust to form volcanoes.

dimulka [17.4K]3 years ago

5 0

Answer:

we need to know what the choices are?

Explanation:

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The time between high and low tide when the current changes direction is called ____.

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URGENT HELP !! The coefficients of static and kinetic frictions for plastic on wood are 0.53 and 0.40, respectively. How much ho

IRISSAK [1]

Answer:

43.83 N

Explanation:

Given that,

The mass of an object, m = 34.4 kg

The coefficients of static and kinetic frictions for plastic on wood are 0.53 and 0.40, respectively.

The force of static friction,

$F_s=\mu_smg\\\\F_s=0.53\times 34.4\times 9.8\\\\F_s=178.67\ N$

The force of kinetic friction,

$F_k=\mu_kmg\\\\F_k=0.40\times 34.4\times 9.8\\\\F_k=134.84\ N$

Net force acting on the object is :

F = 178.67-134.84

= 43.83 N

Hence, this is the required solution.

7 0

3 years ago

To find some of the parameters characterizing an object moving in a circular orbit.The motivation for Isaac Newton to discover h

tamaranim1 [39]

Answer:

$K = \frac{GMm}{2r}$

$T^2 = 4\pi^2(\frac{r^3}{GM})$

Explanation:

As we know that for a satellite the force of gravitation is equal to the centripetal force

so we will have

$F = \frac{GMm}{r^2}$

$\frac{mv^2}{r} = \frac{GMm}{r^2}$

so we know that kinetic energy is given as

$K = \frac{1}{2}mv^2$

so we have

$K = \frac{GMm}{2r}$

now for time period we know

$T = \frac{2\pi r}{v}$

from above expression of kinetic energy we have

$v = \sqrt{\frac{GM}{r}}$

so we have

$T = \frac{2\pi r}{\sqrt{\frac{GM}{r}}}$

so square of time period is given as

$T^2 = 4\pi^2(\frac{r^3}{GM})$

3 0

3 years ago