Displacement using water and measuring with a ruler
100
Explain what an acceleration of 28 m/s/s means.
The speed increases 28 m/s every second.
100
What happens to an astronauts weight and mass as she travels from the earth to the moon?
The mass is the same but the weight will decrease because the moon has less gravity.
100
Explain the Law of Conservation of mass/energy.
Mass and energy cannot be destroyed, they can transform into each other but the total amount never changes.
100
A notecard was placed on a cup of water and turned upside down. Why did the water stay in the cup?
The upward force of air pressure is greater than the downward force of the weight of the water and notecard.
200
Explain what happens to the matter in a log when it is burned.
The amount of matter doesn't change but some of the matter is transformed into something else, like heat and ash.
200
Write an equation of the line for a Position depends on Time graph with a y-intercept of -14 m and a slope of 8 m/s.
position=8m/s*time-14m
200
Describe Newton's Second Law with forces, velocity and acceleration.
The forces are unbalanced, velocity is changing and the acceleration is not zero.
200
What is the velocity of a 32 kg dog running with 5600 J of kinetic energy?
18 m/s
200
Explain what Hubble's Law tells us about the universe.
The universe is expanding and galaxies further away are moving away faster.
300
What is the density of an 80 gram stone with a volume of 4 cm^3?
20 g/cm^3?
300
if the equation of a line is Position=16m/s*time+4m
where will the car be after 6 seconds?
100 m
300
Describe Newton's First Law with forces, velocity and acceleration.
The forces are balanced, velocity is constant or zero and acceleration is zero.
300
A .93 kg toy truck rolls down a 2.09 meter ramp from a height of .65 meters. Calculate the potential energy of the truck at the top of the ramp.
5.9 J
300
According to the Big Bang theory, what was the universe like in the first second after the Big Bang?
There was infinite density, violence, and rapid expansion.
400
Gold has a density of 19.3 g/cm^3 and nickel has a density of 7.81 g/cm^3. The two metals have the same mass. Which has a larger volume and why?
Nickel because it has a lower density, there has to be more volume to have the same mass.
400
If the equation of a line is Position=-2m/s*time+40m
what is the velocity of the object?
2 m/s in the negative direction or -2m/s
400
Describe Newton's Third Law.
The forces between 2 objects are equal but in opposite directions.
400
What is work done be friction if PE at the top of a ramp is 5.6 J and the KE at the bottom of the ramp is 3.4 J?
2.2 J
400
Explain why we use parallel circuits in our buildings instead of series circuits.
We want all of our electrical devices to work as designed. A parallel circuit gets more current every time something is turned on. A series circuit gets less current every time something is turned on.
500
Two clay balls are of equal size, shape and weight. One is flattened. What happens to the mass, weight and shape?
The mass and weight are the same but the shape of the flattened one has been changed.
500
A car has traveled 45 m in 9 seconds. What is the speed?
5 m/s
500
What is the momentum of a 128 kg rock rolling down a cliff at 12 m/s?
1536 kgm/s
500
What is the force done on a box if the work done was 360 J and the box moved a distance of 5 m.
72 N
500
What happens when a compass is brought near a closed circuit?