Show:
Chemistry
Motion
Newton's Laws and Forces
Energy
Earth Science or Electricity
100
How do you find the mass of a liquid?
Put the container on balance, "zero" balance, add liquid.
100
Explain what an acceleration of 42 m/s/s means.
The speed increases 42 m/s every second.
100
A book has a mass of 2.7 kg on Earth, what is its mass on the moon? Why?
2.7 kg, mass doesn't change just because of location.
100
If a ball has 56 Joules of potential energy before it is released how much kinetic energy will it have before it hits the ground? Assume friction is negligible.
56 Joules
100
An index card was placed on top of a cup of water and then turned upside down and held by the cup. What held the notecard on the cup of water after it was turned upside down?
The force of the air under the card.
200
Two objects with the same mass are lowered into water, why does one float and the other sink?
The one that floats is less dense than the one that sinks.
200
Write an equation of the line for a Position depends on Time graph with a y-intercept of 7 m and a slope of -5 m/s.
position=-5m/s*time+ 7m?
200
A child has a mass of 37 kg. What is her weight?
362 Newtons.
200
A toy truck pushes a block .85 meters with a force of 5.2 Newtons. How much work was done on the block?
4.42 Joules
200
What happens when a positively charged object is brought close to a positively charged object?
they repel
300
What is the density of an 118 gram stone with a volume of 3.5 mL?
33.7 g/mL
300
Position=5m/s*time-4m Where will the car be after 8 seconds?
36 m
300
What is the mass of an object that has a weight of 10731 Newtons?
1095 kg
300
A 3.7 kg toy truck rolls down a 1.43 meter ramp from a height of .56 meters. Calculate the potential energy of the truck at the top of the ramp.
20.3 J?
300
What happens when a positively charged object is brought close to a negatively charged object?
They attract
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 volume. Which has a larger mass and why?
Gold because it has a higher density, and mass and density are directly proportional. If density is larger then mass has to be larger for same volume.
400
Position=-8m/s*time+16m Where did the object start?
16 meters in the positive direction
400
If a 125 Newton object is lifted with 324 Newtons what is the unbalanced force on the object?
199 Newtons
400
What is the kinetic energy of 52 kg girl driving at 18 m/sec?
8424 J
400
What happens to the brightness of the bulbs and the current in a series circuit when more bulbs are added.
The brightness of the bulbs decreases and the current decreases.
500
There are 2 samples of silver. One has a mass of 15 grams and the other has a mass of 30 grams. Which one is more dense? Why?
The density is the same because they are both silver and density doesn't change because you have more mass.
500
A car traveled 45 m/s for 18 seconds. How far did it travel?
810 meters
500
A 4000 N piano has a mass of 408 kg. What is its acceleration if it is being lifted with a force of 5200 Newtons?
2.94 m/s/s?
500
What is the velocity of a 30 kg dog with 183.75 J of kinetic energy.
3.5 m/s
500
What happens to the brightness of the bulbs and the current in a parallel circuit when more bulbs are added?
The brightness stays the same and the current increases.