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Methane gas (CH4) comprises 7 x 10-5 % by mass of the Earth's atmosphere. What is the residence time of the gas in the atmosphere if it is being lost to the methane sinks at the rate of 4 x 1011 kg yr-1.
Estimated mass of the Earth's atmosphere = 5 x 1018 kg.
Usain Bolt is running a 100m dash. He accelerates to top speed over the first 45 m, then runs at a constant speed for the last 55 m, What is his top speed
A 0.50-?F and a 1.4-?F capacitor (C1 and C2, respectively) are connected in series to a 14-V battery. Calculate the charge on each capasitor assuming the two capacitors are in parallel
The moon is a satellite that orbits the earth at a radius of 3.85 108 m. What is the orbital speed of the moon
Light intensity of a 100 W bulb at a certain distance is 1 W/m2. The distance is doubled. What are the electric field amplitude and the magnetic field amplitude at that new distance
You throw a 20-N rock vertically into the air from ground level. You observe that when it is a height 15.4m above the ground, Use the work-energy theorem to find its maximum height
A 2120 kg car moving east at 10.7 m/s collides with a 3240 kg car moving east. The cars stick together and move east as a unit after the collision at a velocity of 6.48 m/s.
A car is traveling at 10 m/s. How fast would the car need to go to double its kinetic energy? By what factor does the car's kinetic energy increase
A small drop of water is suspended motionless in air by auniform electric field that is directed upward and has a magnitudeof 8500 N/C. How many excess protons reside on the drop
Two of the same capacitors C are wired in series. When they are connected to a +30V battery, How much energy each capacitor stores
The air inside a bicycle tire pump has 153 joules of work done on it as 89.9 joules of heat is conducted away from it
An egg rolls off a kitchen counter and breaks as it hits the floor. How large is the impulse that the floor exers on the egg, and how large is the force exerted on the egg by the floor when stopping it? The counter is 1.0mhigh, the mass of the egg is..
federal statute requires that a car's bumper be designed to withstand a 2.50 mph (1.12m/s) collision with an immovable object without damage to the body of the car. Calculate the average force on a bumper
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