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A particular coal-fired electric power station uses7.5x109 kg of coal per year to produce 950 MW ofelectrical power. The coal contains 2.4% sulphur bymass. If a scrubber is used to remove 85% of the sulphur fromthe exhaust gases in the form of CaSO3, what mass ofCaSO3 is produced annually?
Two parallel wires are separated by a distance of 5.00 cm. Each wire carries a current of 2.69 A in the same direction, Is the force attractive or repulsive
Waves that are emitted in phase from two sources will undergo constructive interference when the paths from the sources differ by
A crate of mass 45.0 kg is being transported on the flatbed of a pickup truck. What is the acceleration of the crate relative to the ground
A 0.750 kg ball falls directly down onto concrete, hitting it with a speed of 12.0 m/s and rebounding directly upward with a speed of 3.00 m/s. What is the impulse on the concrete
a long solenoid has 100 turnscm and carries current i. an electron moves within the solenoid in a circle of radius 2.40
A spaceship approaches Earth with a speed of 0.70c. What is his heartbeat rate according to an observer that is at rest relative to Earth
An aluminum ring needs to be placed over a cylinder steel bar. At 10.00 degrees C, Find the temperature of the ring at which it fits over the bar
you have two capacitors one with capacitance 10.5 of and the other of unknown capacitance. you connect the two
the radius of a typical human eardrum is about 4.2 .find the energy per second received by an eardrum when it listens
A block of mass m = 5.5 kg is pulled up a ? = 26° incline as in the figure with a force of magnitude F = 37 N. Find the acceleration of the block if the incline is frictionless
A bat can detect small objects, such as an insect, whose sizeis approximately equal to one wavelength of the sound the batmakes. what is the smallest insect a bat can detect
An airplane is cruising along in a horizontal level flight at a constant velocity, heading due west. If the weight of the plane is 2.6´104 N, what is the net force on the plane
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