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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.
Determine the location at which the tuning is formed and the vibrating frequency of a string to form a standing wave pattern.
a cube of wood floating in water supports a 200g mass at the centre of its top face. when the mass is removed, the cube rises by 2cm. determine the volume of the cube
For an equilateral prism, the angle of incidence of 49 degree at boundary 1, Calculate the angle of refraction at boundary 2
what is the electric field amplitude associated with the light from a red laser pointer? assume power0.10mw with a
A basketball player makes a jump shot. The 0.600-kg ball is released at a height of 2.15 m above the floor with a speed of 7.40 m/s. What is the work done on the ball by air resistance
These two isotopes are singly ionized (+e) and each is given a speed of 6.00 x105 m/s.
The distance to the Andromeda Galaxy is estimated at about 2 ´ 106 light years. A light year is distance travelled by light in one year; if the speed of light is 3 ´ 108 m/s, about how far is it from our galaxy to Andromeda? (1 year = 3.15 ´ 107 s..
A rescue helicopter lifts a 80.7-kg person straight up by means of a cable. Use the work-energy theorem and find the final speed of the person
A simple generator has a coil with area A=0.02m2, which is rotated at frequency f=60Hz (remember that angular frequency is 2*pi*f) in a B=0.5T magnetic field. How many windings (number of turns N) are needed if the generator is to develop an avera..
Gas is confined in a tank at a pressure of 13.2 atm and a temperature of 21.5°C. what is the pressure of the gas remaining in the tank
a fan blade is rotating with a constant angular acceleration of 14.0 rads2. at what point on the blade as measured from
A heat pump is essentially an air conditioner installed backward. It extracts energy from colder air outside and deposits it in a warmer room. Suppose that the ratio of the actual energy entering the room to the work done by the device's motor is ..
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