An object is released from an aeroplane which is diving at an angle of 30 degree from the horizontal with a speed of 50m/s. If the plane is at height of 4000m from the ground when the object is released ,find a) the velocity of the object when it hits the ground. b) time taken for the object to reach the ground.​

Emergent properties of living systems are defined as properties that .

Only 3% of the water on earth is usable by humans. even though that 3% is through the water cycle, we still need to be careful not to waste water.

20) what is a magnetic field? 21) in which direction do magnetic field lines always point? 22) sketch a diagram showing how a plotting compass points around a 23) name two magnetic poles that will: a) attract each other b) repel each other. 24) explain why you can use a compass to navigate. 25) what's an electromagnet? 26) list two ways to increase the strength of an electromagnet. 27) the wire in a simple motor feels a force when a current flows through it. why is this? i need answers to check mine