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A light bulb emits light uniformly in all directions. The averageemitted power is 150.0 W. At a distance of 7 m from the bulb,determine (a) the average intensity of the light,(b) the rms value of the electric field, and(c) the peak value of the electric field.
A total of 3.02 106 electrons are placed on an initially uncharged wire of length 1.45 m. What is the magnitude of the electric field a perpendicular distance of 0.400 m away from the midpoint of the wire?
The only two forces acting on a body have magnitudes of 20 Nand 36 N and directions that differ by40°. What is the mass of the body
The tension in a ligament in the human knee is approximately proportional to the extension of the ligament, What is the tension in this ligament when it is stretched by 0.67 cm
A transverse wave on a string is described by the equation y(x, t) = (2.30 cm) sin[(100 rad/s)t + (18 rad/s)x]. How fast does the wave move along the string
a proton moves perpendicular to a uniform magnetic field at a speed of 1.55 x 107 ms and experiences an acceleration of
An airplane has a mass of 3 * 104 kg and takes off under theinfluence of a constant net force of 35 000 N. What is the netforce that acts on the plane’s 80 kg pilot, assuming that hehas the same acceleration as the plane?
A microscope has an objective lens of focal length 6.75 mm. The objective forms an image 16.4 cm from the lens. How far from the objective should the object be placed
A 50.0 kg box is resting on a horizontal floor. A force of 250 N directed at an angle of 26.0 degrees below the horizontal is applied to the box. What is the minimun coeffiecient of static friction
An astronaut is being tested in a centrifuge. The centrifuge has a radius of 6.59 m and, in starting, what is the magnitude of the astronaut's linear speed
a 10.5-kg uniform board is wedged into a corner and held by a string at a 50 degree angle. calculate the tension in the
How far from a 50-mm focal length lens, such as is used in many35-mm cameras, must an object be positioned if it is to form a real image magnified insize by a factor of three?
Two free charges(+)q and (+)4q are separated by a distance l meters. find the magnitude,sign and location of a third charge which makes the system in equilibrium
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