Definitions
Variables/Identify
Energy Calculations
Random
100
What is the definition of energy
Something that is working or has the ability to work
100
Identify what kinetic energy is
An object that is moving
100
What is the potential energy of a 0.5 kg ball that is being held 2 m in the air?
9.8 J
100
What flag is this?
Scotland
200
What is the definition of energy efficiency
Energy efficiency is the useful energy an object outputs against its wasted energy.
200
What are 4 units used to describe energy
Newtons, volts, joules, kilojoules, watts
any others?
200
A light bulb takes in 110 J of energy and produces 90 J of heat and 20 J of light energy. How efficient is the light?
18%
200
Which famous scientist developed the theory of relativity? (full name)
Albert Einstein
300
Define the law of conservation of energy
Energy cannot be created or destroyed only transformed or transferred
300
What is the value of g in the formula below
GPE = g x m x h
gravity = 9.8m/s
300
A car that has a mass of 900 kg is travelling at 13.8 m/s. How much energy does it have?
Answer in J
86800 J
300
Which artist painted the roof of the Sistine Chapel in Rome?
Michaelangelo
400
Define Friction
Friction is when two objects move with or against each other creating heat and resistance
400
Identify the independent, dependent and controlled variables from the question below.
How does the volume of water affect the number of days it takes for a tomato plant to flower?
I - Volume of water
D - Number of days for a tomato plant to flower
C - soil, tomato seeds, water
400
A gas heater releases 450 J of heat, 200 J of light and 50 J of sound. How efficient is the heater?
64%
400
How many months have 28 days?
12! ALL OF THEM HAVE 28 DAYS
500
Define Mechanical energy
kinetic and potential energy combined
500
BONUS RANDOM QUESTION
How many days of school are left this term? Not including today!
40 days left
500
A diver weighs 85000 g, they are 0.0075 km in the air. What is their potential energy?
Answer in J
6250 J
500
How many keys does a grand piano have?
88