Chemical Reactions
This speeds up a reaction
What is a catalyst?
The tendency of an object to resist a change in its movement
What is inertia?
Two simple machines that are variations of inclined planes
What are screw and wedge?
What is friction?
Waves move faster through _________ materials.
What is more dense?
Garbage buried in a compost pile is an example of this
What is a chemical change?
These are the four basic noncontact forces
What are gravitational, strong nuclear, weak nuclear, and electromagnetic?
Name the type of lever a wheelbarrow is
What is second class?
This is how much power is required to lift a TV with a mass of 29 kg, 9 meters into the air in 3 seconds.
What is 853 Watts?
What is Compression?
In order for a chemical reactions to take place, this must happen.
What is the reactants must come into contact with each other?
Newtons' three laws of motion
What are Inertia, F=ma, and every action has an equal and opposite reaction?
Scissors and knives are examples of this
What are wedges and levers?
This determines, at the molecular level, whether an acid is weak or strong.
What are hydronium (H+) ions?
The bending of a wave as it passes from one medium to another
What is rarefaction?
The energy needed to start a reaction
What is activation energy?
A buoyant force opposes this
What is gravity?
Ideal Mechanical Advantage
What is how useful a machine is disregarding friction?
When an acid and base are mixed, this forms
What are water and salt?
Three ways heat can be transferred.
What is conduction, convection and radiation?
Five factors that influence chemical reaction rate
What are surface area, concentration, temperature, pressure, catalyst?
Riley is riding her bike at 15 m/s when a ball rolls into the street 10 meters in front of her. She hits her brakes and stops 3 seconds later, 2 meters in front of the ball. What is her acceleration?
What is -5 m/s/s?
Efficiency of pulleys is calculated by this
What is AMA/IMA x 100?
A high jumper has a mass of 85 kg and a GPE of 1970 Joules. How high does he jump?
What is 2.36 meters?
What will the final temperature of a 50.0 gram piece of glass be if it absorbs 5275 calories of heat and its specific heat capacity is 0.5 cal/gC. The initial temperature is 20C.
What is 231 degrees Celsius?