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Two point charges are located along the x axis: q1 = +6.0 μC at x1 = +4.0 cm, and q2 = +6.0 μC at x2 = -4.0 cm. Two other charges are located on the y axis: q3 = +3.0 μC at y3 = +5.0 cm, and q4 = -8.0 μC at y4 = +7.0 cm. Find the net electric field (magnitude and direction) at the origin.
An object that has a mass M hangs from a support by a massless string of length L (see figure below). The support is rotated so that the object follows a circular path at an angle θ from the vertical as shown. The object makes N revolutions per se..
A 10 m x 14 m house is built on a 12 cm-thick concrete slab. What is the heat-loss rate through the slab if the ground temperature is 5 degrees C while the interior of the house is 22 degrees C
The tune of a string instrument will change if it is heated or cooled because the different materials expand or shrink in different ways, resulting in changes in tensions. Calculate by how much each will shrink if both are initially 33 cm long
Ten days after it was launched toward Mars in December 1998, the Mars Climate Orbiter space craft (mass 629 kilogram) was2.87 x 106 kilometer from the earth and traveling at 1.20 * 104 km/h relative to the earth. The space craft kinetic energy rela..
The position of a particle moving along an x axis is given by x = 11t2 - 6.0t3, where x is in meters and t is in seconds. What is the maximum positive velocity reached by the particle
A storage tank 30 m high is filled with gasoline. Find the gauge pressure at the bottom of the tank
three vectors a b and c each have a magnitude of 50m and lie in the x-y plane. their directions relative to the
A spinning object has a moment of inertia of 1.6 kg*m2. It is rotating at a rate of 1 rad/s. If the moment of inertia increases to 3 kg*m2, what is its new rotational velocity
A tube of mercury with resistivity 9.84 x 10-7Ω*m has a 25 N/C electric field inside thecolumn of mercury. How much current is flowing, if the diameter ofthe tube is 1.0 mm
A 4.2kg object,initially at rest,''explodes''into three objects of equal mass. How much kinetic energy was released in the explosion
A ball of mass 0.500 kg is attached to the end of a cord 1.50 m long. The ball is whirled in a horizontal circle as shown in the figure. What is the tension in the cord if the ball is whirled with speed of 10 m/s^2?
The K-shell ionization energy of titanium is 4969 eV. The L-shell ionization energy is 462 eV. Determine the wavelength of the Kalpha emission line of titanium
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