3 years ago

Why is there convection in the outer core and what is the result of this?

1 answer:

6 0

Answer:

re believed to influence the Earth's magnetic field. ... As heat is transferred outward toward the mantle, the net trend is for the inner boundary of the liquid region to freeze, causing the solid inner core to grow

Explanation:

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About how many times greater is the density of a neutron star compared to a white dwarf?

irina1246 [14]

Answer:

Explanation:

over a million times

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2 years ago

A radio wave wavelength is shorter than visible light. True or False.

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False. Radio waves have much longer wavelengths and lower frequencies than visible light waves

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2 years ago

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Consider the free-body diagram. If you want the box to move, the force applied while dragging must be greater than the

VLD [36.1K]

You would want it to be greater than D. friction force

It needs be greater than the friction applied to it.

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2 years ago

A particle starts from rest and has an acceleration function 5 − 10t m/s2 . (a) What is the velocity function? (b) What is the p

frez [133]

Explanation:

It is given that,

A particle starts from rest and has an acceleration function as :

$a(t)=(5-10t)\ m/s^2$

(a) Since, $a=\dfrac{dv}{dt}$

v = velocity

$dv=a.dt$

$v=\int(a.dt)$

$v=\int(5-10t)(dt)$

$v=5t-\dfrac{10t^2}{2}=5t-5t^2$

(b) $v=\dfrac{dx}{dt}$

x = position

$x=\int v.dt$

$x=\int (5t-5t^2)dt$

$x=\dfrac{5}{2}t^2-\dfrac{5}{3}t^3$

(c) Velocity function is given by :

$v=5t-5t^2$

$5t-5t^2=0$

t = 1 seconds

So, at t = 1 second the velocity of the particle is zero.

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2 years ago

A motorist travels at 270 km in p hours at a certain average speed. an expression for the distance that this motorist travelled

wel

Average speed = total distance / time ⇒ total distance = average speed * time

Average speed = 270 km / p hours
distance = d
hours = x

d = 270/p * x

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3 years ago