because if you put somethin ht next to something cold it will become cooler and if you be two things that are hot next to each other they will remain hot.

3 0

3 years ago

The bar ab has a velocity at point a of va = [20,9] m/s and an angular velocity w = 23 rad/s. If the distance between a and b is

DiKsa [7]

speed of point A is given as

$v_a = 20.9 m/s$

$v_a = r*\omega$

here r = distance from the axis

so here we have

$20.9 = r*23$

$r = 0.91 m$

now the distance of point A and B is 0.71 m

while the distance of axis from point A is 0.91 m

so distance of axis from point B will be given as

$r = 0.91 + 0.71 = 1.62 m$

now for the speed of point b is given as

$v = r \omega$

$v = 1.62 * 23$

$v = 37.26 m/s$

so end point B will move with speed 37.26 m/s

8 0

3 years ago

GIVING BRAINLIEST Which statement best explains how Earth's magnetic field is generated? Earth's core spins slower than its crus

zimovet [89]

Answer:

The convection of heat within the mantle Rotation of liquid iron in the outer core

Explanation:

The electrical currents and convecting movements within the Earth's liquid core generate the planet's powerful magnetic field, which in turn drives the inner core in the way that can now be observed.

8 0

3 years ago