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Q1. A unit of area often used in measuring land areas is the hectare defined as 114 m2. An open pit coal mine consumed 77 hectares of land down to the depth of 37 m each year. What is the volume of earth in cubic kilometres removed in this time?
Q2. At what distance from a backstop will a package need to be placed depending on its weight and knowing it has to hit the backdrop at a velocity of 66 in/sec on a 11 degree angle. What is distance for every 5 lbs of package weight?
A standard 100 W (120 V) lightbulb contains a 9.90cm -long tungsten filament. The high-temperature resistivity of tungsten, What is the diameter of the filament
An isolated conductor of arbitrary shape has a net charge of +1.30×10-5 C. Inside the conductor is a cavity within which is a point charge q = +3.25×10-6 C. What is the charge on the cavity wall
The acceleration of a particle is given by ax(t)=? 2.10m/s2 +( 3.03m/s3 )t, What will be the velocity at time t = 3.94s
As the temperature of ice is increased, it changes first into a liquid and then into a vapor. How might one produce liquid carbon dioxide
A 1300 nF capacitor with round parallel plates 1 cm in radius is accumulating charge at the some unknown rate at time t0. What is the changing rate of the charge
A picture hangs on the wall suspended by two strings, as shown in the figure, with theta = 68°. The tension in string 1 is 1.4 N. What is the weight of the picture
A school bus takes 0.89 h to reach the school from your house. If an average velocity of the bus is 21.1 km/h to the east, what is the displacement.
A drug prepared for a patient is tagged with 9943Tc, which has a half-life of 6.05 h. What is the decay constant of this isotope
A comet has a very elliptical orbit with a period of 124.0 y. If the closest approach of the comet to the Sun is 0.09 AU, what is its greatest distance from the Sun
A 6 m board of mass 5 kg is hinged at one end, with a 60 kg block nesting on the board 202 cm from the hinge. Find the force exerted by the hinge at this angle
Two air-track gliders m1 and m2 are joined together with a light string. What is the tension in the cord joining gliders
A standing wave is in a open end tube. The tube length is 1.80m, determine the fundamental frequency
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