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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?
The index of refraction for a diamond for red light of wavelength 654 nm is 2.35, Find the angle of refraction for red light
A bucket of mass 1.70kg is whirled in a vertical circle of radius 1.55m . At the lowest point of its motion the tension in the rope supporting the bucket is 21.0N. Find the speed of the bucket
An alpha particle (the nucleus of a helium atom formed by 2 protons and 2 neutrons, What would be the force on the alpha particle if it were traveling parallel to the magnetic field lines
An electric motor is plugged into a standard 120V electrical service. At startup a current of 23.4A is measured. what is the operating current with the new resistor added
An ideal gas expands at a constant pressure of 2.9 atm from 435 mL to 709 mL. Heat then flows out of the gas, determine the total heat flow into the gas
A nerve fiber (axon) may be approximate as a long cylinder. what is the resistance of a 0.3-m long fiber
At the factory, a noon whistle is sounding with the frequency of 464 Hz. As a car travelling at 76 km/h approaches the factory, driver hears the whistle at frequency fi. After driving past the factory, the driver hears frequency ff. What is the chang..
Calculate the y-component of the magnetic force. How fast must the candy bar travel to have the same joules in the form of kinetic energy.
A mouse is running away from a cat at 0.75 m/s and, at 1.25 m from his mouse hole, he accelerates at a constant rate of 0.25 m/s2 until he reaches his hole safely. How long a time was required for him to cover the last 1.25 m?
Firemen are shooting a stream of water at a burning building. A high-pressure hose shoots out the water with a speed of 23.0m/s as it leaves the hose nozzle. Find the angle of elevation of the hose
A small plastic sphere charged to -10 nC in held 1.0 cm above small glass bead at rest on a table. find the maximum charge can the bead have without leaping up
A square loop 15 cm on a side lies in the xy plane. Its resistance is .55 ohm. A magnetic field points in the +z direction, What is the direction of the induced current in the loop
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