Which best describes sid’s error?

tangential speed changes throughout a satellite’s orbit.
centripetal force is perpendicular to the velocity of the satellite.
tangential speed increases with a satellite’s increasing distance from earth.
centripetal force can sometimes slow down a satellite in orbit.

Centripetal force is perpendicular to the velocity of the satellite.

This is becuase Tangent is always perpindicular to radial (centripital)

Imagine swining a ball around a string. The string pulls the ball towards the centre (radial) while the balls own velocity moves it forward (tan).

The horizontal and vertical forces create a diagnal force which makes the circular path!

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.

the best answer for these questions would be:

1.            c. is smaller

2.            d) concrete operational

3.            b) interaction with the environment – the children interact with their environment can them learn more.

4.            a) parents who reason openly with children can limit a child’s cognitive ability.