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In the rectangle in the drawing, a charge is to be placed at the empty corner to create the net force on the charge at corner A point along the vertical direction. What charge (magnitude and algebraic sign) should be placed at the empty corner?
A person with mass of 70kg is climbing a ladder with a length of 6 m and the ladder has a mass of 20kg that leans against a smooth, What is the magnitude of the frictional force of the floor
A copper rod is fastened securely at both ends to immovable supports. What is the magnitude |?T| of the change in temperature of the rod when it ruptures
Three equal point charges, each with charge 1.50, are placed at the vertices of an equilateral triangle whose sides are of length 0.550. What is the electric potential energy of the system? (Take as zero the potential energy of the three charges w..
An object is 0.9 m away from a particular lens. The lens produces an image of that object 30 cm on the other side of the lens. Is this lens converging or diverging? Find the focal length of this lens.
A motorist inflates the tires of her car to a pressure of 170 kPa on a day when the temperature is -8.0°C. What is the temperature of the tires
heat is a energy transferred by virtue of a temperature difference b energy transferred by macroscopic work c energy
The magnetic field component of the electromagnetic wave is 15.0 ?T. What is the magnetic energy density of the wave
What are the wavelength ranges for the following? (a) the AM radio band (540-1600 kHz) m (maximum wavelength) m (minimum wavelength) (b) the the FM radio band (88-108 MHz) m (maximum wavelength) m (minimum wavelength)
The distance between two telephone poles is 200 ft. A 3 poundbird lands on the phone wire midway between the poles. If the wiresags 4 inches what is the tension in the wire?
The positively charged plate of a parallel-plate capacitor has a charge equal to Q. When the space between the plates is evacuated of air, What is the dielectric constant of the material
In the bible Noah is instructed to build an ark 300 cubits long, 50.0 cubits wide, and 30.0 cubits high. What would be the dimensions of the ark in meters
A uniform, cylindrical pulley of mass M=12.7 kg and radius R=0.636 m rotates freely about a fixed horizontal axis. What is the magnitude of the angular acceleration of the pulley
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