An ideal projectile starts and lands at the same hieght on the ground.

1) does the projectile spend more time in flight above or below 1/2 of its maximum height?

2) solve for fraction of time spent above 1/2 maximum height.

3) prove that y position is symmetric about maximum height.

i know the answer for the first one is above 1/2 its maximum height but need with 2) and 3) .

What determines the amount of inertia an object has

What are two examples of phase changes that skip a phase during transition?

69. air frictionthe velocity of the satellitea. decreases b. increases c. sometimes increases sometimedecreases d. no effect at all70. the unit of gravitational potential energy isa.jouté b.watt c. newtond.pascal71. which of the following is not influenced by a magneta. cobalt b.copper c.irond. nickel72. one joule of work done in one second by unit positive chargea.1 watt b.1 volt c.1 js d. none73. the most deviated colour of light after passing through a prisea. violet b.red c. green d.yellow4. a coin is placed below a beaker fill with water upto 12 cm isdisplaced by water isa. 9cm b.6cmс.3cmd.7cm