Biology
Chemistry
Physics
Environmental Science
Misc
100
If one cell divides every 20 minutes, how many cells will there be after 1 hour starting with 1 cell?
What is 8?
100
The atomic weight of carbon is 12. How many grams are there in 2 moles of carbon?
What is 24 grams?
100
If a car travels 60 km in 2 hours, what is its average speed?
What is 30 km/h?
100
A city uses 1,000,000 gallons of water daily. How much is used in a year (365 days)?
What is 365,000,000 gallons?
100
If a marathon is 42.195 km, how many meters is it?
What is 42,195 meters?
200
The heart beats 72 times per minute. How many beats does it make in 1 hour?
What is 4,320 beats?
200
If a solution has a pH of 4, what is its hydrogen ion concentration, [H+][H^+][H+], in moles per liter?
What is 10^-4 M?
200
A wave has a frequency of 500 Hz and a wavelength of 2 m. What is its speed?
What is 1000 m/s?
200
If 1 tree absorbs 48 pounds of CO2 per year, how much do 100 trees absorb?
What is 4,800 pounds?
200
The population of a town grows by 2% annually. If the current population is 10,000, what will it be next year?
What is 10,200?
300
A DNA molecule is composed of 10 base pairs per turn. If a DNA strand is 3,000 base pairs long, how many turns does it make?
What is 300 turns?
300
Avogadro's number is 6.022×10^23. How many molecules are in 3 moles of water?
1.807 * 10^24
300
Gravitational Force is given by the following formula. If m1 = 10, m2 = 5, r = 2, and G = 6.674 * 10^-11, calculate F.
What is 8.3425×10^-11N?
300
A factory emits 2 tons of CO2_ per day. How much does it emit in a leap year (366 days)?
What is 732 tons?
300
A cube has a side length of 4 cm. What is its volume?
What is 64 cm³?
400
A human has 46 chromosomes. If each chromosome has 1,000 genes on average, how many genes are in a human cell?
What is 46,000 genes?
400
A reaction releases 50 kJ of energy per mole. How much energy is released by 4 moles of the substance?
What is 200 kJ?
400
A box is pushed with a force of 50 N over a distance of 5 m. How much work is done?
What is 250 J?
400
A solar panel produces 500 watts of power. How much energy does it produce in 24 hours?
What is 12,000 watt-hours or 12 kWh?
400
A clock's minute hand is 15 cm long. What distance does the tip of the hand travel in 1 hour?
What is 94.2 cm?
500
An enzyme speeds up a reaction by a factor of 1,000,000. If the original reaction takes 10 minutes, how long does it take with the enzyme?
What is 0.00001 minutes or 0.6 milliseconds?
500
The ideal gas law is PV = nRT. If P = 2 atm, V = 10 L, and T = 300K, calculate n (R = 0.0821).
What is 0.81 moles?
500
A 10 kg object is moving at 15 m/s. What is its kinetic energy?
What is 1,125 J?
500
A car has a fuel efficiency of 30 miles per gallon. How many gallons does it use to travel 900 miles?
What is 30 gallons?
500
If the radius of a circle is tripled, by what factor does the area increase?
What is 9?