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A rifle is aimed horizontally at a target 50 meter away. The bullet hits the target 2.2 centimeter below the aim point.
(a) Find what was the bullets flight time?
(b) Find what was the bullets speed as it left the barrel?
an artillery shell is fired with a minimal velocity of 420 ms at 53o above the horizontal. to clear an avalanche it
the solar wind is a thin hot gas given off by the sun. charged particles in this gas enter the magnetic field of the
What mass of steam at 100 degrees Celcius must be mixed with 165g of ice at its melting point, in a thermally insulated container, to produce liquid water at 60 degrees celcius?
An airplane flies 200km due west from city Band then 285 km in direction of 28 degrees north of west from city B to city C. in a straight-line distance how far is city C from city A.
A 10m uniform beam of weight 100 N is supported with two ropes at the ends. If a 400 N person sits at 2.0 m from the left end of the beam, what is the tension in the left rope? (Please provide calculations)
A coin placed 11.0 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 36 rpm is reached and the coin slides off.
the n = 2 state of hydrogen has a lifetime of about 10^-8 sec. Suppose the atom jumps from the n=2 state to the ground state, what is the uncertainty in the energy of the photon that is emitted
In an EM wave traveling west, the B field oscillates vertically and has a frequency of 84.0 kHz and an rms strength of 6.30×10^?9T. What is the frequency of the electric field? What is its direction?
A car is being pulled out of the mud by two forces that are applied by the two ropes shown in the drawing. The dashed line in the drawing bisects the 30.0° angle.
When the wavelength of an incident radiation exceeds 560nm the emission of photoelectrons from a surface ceases. What is the stopping potential for this electrons
To help keep her barn warm on cold days, a farmer stores 865kg of warm water. How many hours would a 2.00-kilowatt electric heater have to operate to provide the same amount of heat as is given off by the water as it cools from 20.0 degrees celcius t..
An electron is released from rest at the negative plate of aparallel plate capacitor and accelerates to the positive plate. The plates are separated by a distance of 1.4 cm, and the electricfield within the capacitor has a magnitude of 2.2 x 106V/..
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