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Meteor Crater in Arizona is thought to have been formed by the impact of a meteor with the Earth some 20,000 years ago. The mass of the meteor is estimated at 5 x 1010 kilogram. Its speed is estimated at 7200 m/s. Find what speed would such a meteor give Earth in a head-on collision?
m/s
A hydrogen atom is in its first excited state (n = 2). Using the Bohr theory of the atom, calculate (a) the radius of the orbit, (b) the linear momentum of the electron.
A car with a total mass of 1.78 103 kg has wheels of radius 31.0 cm and moment of inertia 0.805 kg · m2. Find the car's rotational energy when the car is moving at a speed of 22.5 m/s
In a certain automobile engine with an efficiency of 19.2%, combustion of gasoline in one cylinder releases 490 J of heat. Find the total mechanical power produced by all four cylinders, operating at 48 cycles/s, or 2880 rpm
The voltage drop along a 30.0m segment of a power line made from copper wire (a very good conductor) is 1.2V, while carrying a current of 25.0 A. How large is the electric field along the wire
A space probe which is a distance of 1.6×1010 m from a star measures the total intensity of electromagnetic radiation from the star to be 5700 W/m^2. what is its total average power output
A spring with the spring constant K=14N/m is compressed 15cm, What is the Elastic potential energy stored in the spring
At an outdoor market, a bunch of bananas attached to the bottom of a vertical spring of force constant 16.0 N/m is set into oscillatory motion with an amplitude of 20.0 cm. What is the weight of the bananas in newtons
A in-ground swimming pool has a dimensions of 20 meters long by 15 meter wide and 3.00 meter deep. What is the total force exerted on bottom of pool
Find the angular velocity, in rad/s , of the earth due to its daily spin on its axis, the earth due to its yearly motion around the sun, and our moon due to its monthly motion around the earth
An alternating emf source with a variable frequency fd is connected in series with a 50.0 ? resistor and a 20.3 ?F capacitor. find the angular speed at which the phasors rotate
A turntable has rotational inertia I and is rotating with angular speed w about a frictionless vertical axis. A wad of clay with mass m is tossed onto the turntable and sticks a distance d from the rotation axis. The clay hits horizontally with it..
A car with a mass of 930 and a speed of = 19.0 approaches an intersection, as shown in the figure . A 1270 minivan traveling at is heading for the same intersection. The car and minivan collide and stick together. The direction of the wreckage aft..
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