Answer:
Is fire matter? Matter is anything that has mass and occupies space. The flame itself is a mixture of gases (vaporized fuel, oxygen, carbon dioxide, carbon monoxide, water vapor, and many other things) and so is matter. The light produced by the flame is energy, not matter.
Answer:
28 metres
Explanation:
when the bag is about to hit the ground
potential energy = kinetic energy
where m = mass
g = acceleration due to gravity
v = speed
when you simplify the above equation and make v subject of the formular we have
where g = 9.8m/s
h = 40
Answer: You use friction when your bike stops.
Explanation: Force and friction affect our daily lives in numerous amounts of ways. For instance, when a football is kicked, it moves faster later after some time its force decreases due to friction. A common example of friciton is when a bike stops. When the brakes are applied the friction on the pads cause the bike to stop.
Answer:
100 times
Explanation:
The light gathering power is the ability of a telescope to accumulate plenty of light than the human eye.
The area of the objective lens is given by:
Circular area= pi × diameter/4
Given diameter of telescope =60mm
Diameter of human eye =6mm
3.142×60^2/4 ) ÷ (3.142×6^2/4)
Cancelling pi out leaves
(3600/4)÷(36/4)
900/9 =100 times