Write down the relationships for finding the range and time of flight for a projectile fired
with an initial velocity of U and at an angle of
elevation of 0. A body projected upward at an
angle of 30° with the horizontal has an initial
speed of 90 ms. In how many seconds will it
reach the ground? How far from the point of
projection will it strike the ground? At what
angle with the horizontal will it strike?

it becomes positively charged by charging it

we need to know the time interval during which the force acts. impulse of force = momentum change

cant without the picture! ?

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods