Unit 1
Nature of Science
Nature of Science
The predictive statement that helps guide your experiment.
Hypothesis
Contact or noncontact?
Wind blowing through the trees.
Contact
The amount of matter in a given space.
Density
Is the following machine simple or complex?
A Screw
Simple Machine
Electricity can cause what type of burns to a human?
4th degree burns
Number of Sig Figs?
70.00
4
Balanced or unbalanced force?
A satellite in orbit.
Balanced
Correctly list in order which liquid would sink to the bottom to which would float on top.
Honey 1.42 g/mL
Olive oil 0.90 g/mL
Water 1.00 g/mL
Ethyl alcohol 0.81 g/mL
Honey, Water, Olive Oil, Ethyl Alcohol
A flat surface tilted at an angle to help lift objects with less force.
Inclined plane
When a fuse has too much energy running through it and it is blown, can you reset it or will be need to be replaced?
Replaced
Round to the correct number of sig figs.
200 mL + 46.49 mL - 1.25mL
245
Which of Newton's Laws does this represent?
After you start up a car, as you give it more gas, it goes faster.
2nd Law
Copper has a density of 8.96g/mL. If a penny is solid copper (it isn't) and has a mass of 3.2 grams, what volume does the penny have?
0.357 mL.
A force was used to push a box along the floor for a distance of 8.0 m . If 160.0 J of work was done, what force was applied?
20 N
When working on electrical, how should you cut the power to the area you are working in?
From the breaker.
Round to the correct number of sig figs.
2.0 m / 18.2 m
0.11
A beetle travels at a speed of 0.09m/s, it travels a distance of 1.08m before it is caught in a jar. Calculate the time taken for the beetle to travel.
12 seconds
The buoyant force on an object equals 250 N. What is the weight of the displaced water?
250 N
How much power does a crane develop doing 60,000 J of work in 5.00 minutes?
200 W
The amount of power going out of an outlet should equal?
The amount of power going back into the outlet.
What is the metric conversion?
2.95 g = _______________ hg
A dog has a mass of 44 kg, what is the dog’s weight on Earth?
431.2 (gravity at 9.8 m/s2) or 431.6 (gravity at 9.81 m/s2)
If an object weighing 50.0 N displaces a volume of water with a weight of 10.0 N, what is the buoyant force on the object?
10 N
A crane lifts a 1500 kg car 20 m straight up. How much potential energy does the car gain?
294,000 J (gravity 9.8 m/s2) or 294300 J (gravity 9.81 m/s2)
These should be installed anywhere near water for safety reasons.
GFCI Outlets