energy/general units
What two measurements share the variable capital P?
Pressure and Power
If P= F/A, rearrange the equation to solve for A
A = F/P
What is the distance from equilibrium to the crest of a wave called?
If an object loses many electrons, does it acquire a positive or negative charge?
positive
In what year was the first Apple iPhone released?
2007
If a thermometer is marked to the tenths place, to what decimal place should your written measurement go?
hundredths
6,000 kg m/s
What happens to the speed of a sound wave when the temperature of the air increases?
It increases too.
If an object is at the top of the triboelectric series, is the object good at DONATING electrons or ACCEPTING electrons?
donating
What is the longest-running animated American sitcom in television history?
The Simpsons
If you leave a 60 W lightbulb on for 2 minutes, how many Joules of energy did the light bulb use?
7,200 J
If the surface area across which a force occurs increases, what happens to the pressure the object exerts on the surface?
What is the law of reflection?
The angle of the incident ray is equal to the angle of the reflected ray.
Fur is rubbed on a balloon that is then held close to a mirror. What happens to the molecules/atoms in the mirror?
They are polarized.
What percent of the Earth's surface is covered in water? (+/- 3%)
68%-74% (71% is answer)
283 K
If a 500 lb bear exerts a pressure of 30.0 lb/in2, how much of his feet's surface area is in contact with the ground?
16.7 in2
If magenta light shines on a green shirt, what color will the shirt appear to you?
black (both the red and blue light will be absorbed)
If the wavelength of a wave doubles, what happens to the frequency of the wave?
It is cut in half.
How many bones are in a single human foot? (you can be wrong within 1 bone)
26 (so, 25-27)
If the energy company PG&E charges $0.50/kWHr, how much will it cost to run a 1,000 W oven, a 2,000 W dishwasher and a 500 W heater for 3 hours?
$5.25
If a 100 kg car driving west at 30 m/s collides and sticks to a 200 kg car also driving west at 10 m/s, what is their speed after the collision?
16.7 m/s
What is the wavelength of a standing wave oscillating at harmonic #4 (open-open) if the length of the system is 10 m?
5 m
If two balloons, each with a charge of +2.0 C are held 1,000 m from each other, how much force do they exert on each other?
36,000 N
What emoji do people use the most across social media platforms?
The happy/crying face emoji (Face with Tears of Joy)