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A 10 kg door that is 1.0m wide and 2.5m tall is supported by two hinges,each of which is 10 cm from the top(or bottom)of the door. If each hing supports half the weight of the door, what is the force on each hinge? Remember,force is a vector?
A heat engine operates in a Carnot cycle between 82.0°C and 345°C. It absorbs 20,000 J of energy per cycle from the hot reservoir, What is the mechanical power output of this engine
In a region of vacuum containing a magnetic field of 9.00 T and an electric field of 9.00 V/m, calculate the energy density due to each field
A copper wire has a square cross section 2.7 on a side. The wire is 3.8 long and carries a current of 4.0 . The density of free electrons is 8.5*10^28 m^-3.
A professional race-car driver buys a car that can accelerate at 5.3 m/s2. Find the velocity of the race car when the two drivers are side by side
A 160 object is taken to a height of 320 above the Earth's surface. What is the object's mass at this height
A series RLC circuit has a resistance of 80? , an inductance of 0.48H , and a capacitance of 3.0, f= 130Hz. What is the impedance at that frequency??F
A singly charged ion of mass m is accelerated from rest by a potential difference ?V. What is the ratio of the masses of the ions
The position of a particle moving along the x axis is given in centimeters by x = 9.75 + 3.50t 3, where t is in seconds. Calculate the average velocity
Att= 0 an electron crosses the positivey-axis (sox= 0) at30cm from the origin with velocity6.105m/s in the positivex-direction. It is in a uniform magnetic field.
The magnitude of the acceleration due to gravity
A coin is placed on a turntable 13 cm from the center. A lump of clay placed behind the coin prevents it from sliding backwards , How long will it take before the coin begins to slide radially
A spacecraft is in orbit around a planet. The radius of the orbit is 3.0 times the radius of the planet (which is R = 71497 km). What is the period of the spacecraft's orbit
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