Posted by admin | Posted in Uncategorized | Posted on 27-12-2010
Tags: flashlight, headlight, headlight torch led, headlight torch light, headlight torch review, headlight torch used, headlight torch waterproof, howto, led, light
can you answer my science q on energy ? kinetic/gravitational etc.?
Yr8 science – energy help !?
I just want to check my answers so please answer them correctly !
1) Which of the following is not a fuel?
A coal
B food
C steam
D petrol
2) Which one is not a good example of something that had useful energy?
A wind
B sunshine
C a concrete post
D a wooden log
3) select from the at the bottom the useful form of energy in:
gravitational potential
kinetic
elastic potential
chemical
sound
heat
light
electric
a) a person standing on a bridge about to do a bungy jump
b) a person doing a bungy jump from a bridge when the bungy rope is fully stretched and the personis at the bottom
c) a person doing a bungy jump from a bridge just before the rope slows the person down
d) the battery in tour torch
e) the headlights of your car shining onto the road
f) a large boulder balanced on the edge of a cliff
g) boiling water in a saucepan on the stove
I am going to ask another question later on, plz answer that too !
1. c) Steam – it doesn’t have any molecular structure that can be broken down to form energy … there’s no ‘fuel’ energy in water
2. c) It has energy, but what can ou do with it? Wind – you can have a windmill. Sunshine – solar panel. Wooden log – burn baby burn!
3.
a) and process of elimination leaves this with sound … but this doesn’t fit. It should be gravitational again….
b) elastic energy
c) kinetic
d) electric energy
e) light energy
f) gravitational potential
g)boiling water – heat energy
Testing HeadLight 56 LED and 100 LED Torch
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