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During heavy rain, a section of a mountainside measuring 3.8 km horizontally (perpendicular to the slope), 0.44 km up along the slope, and 2.7 m deep slips into a valley in a mud slide.
Assume that the mud ends up uniformly distributed over a surface area of the valley measuring 1.2 km x 1.2 km and that the mass of a cubic meter of mud is 1900 kg. What is the mass of the mud sitting above a 3.7 m2 area of the valley floor?
A student notices that 38 mm f11 appears near the lens of an inexpensive camera. What is the focal length of the lens. What is the diameter of the diaphragm opening
A charge of +111 C is fixed at the center of a square that is 0.80 m on a side. How much work is done by the electric force as a charge of +8.1 C is moved from one corner of the square to any other empty corner?
does the resistivity of a material depend on its length or cross-sectional area? does the resistance depend on the
The image of an object through a diverging lens is 5.00 cm in front of the lens. If the magnification is 0.250,determine object distance and and focal length
An alpha particle (a helium nucleus) is traveling along thepositive x-axis at 1175 m/s when it enters a cylindrical tube ofradius 0.400 m centered onthe x-axis. How far does the particle travel before hitting the tube wall
One mole of dry air has an initial state of T = 293 K and p = 900 hPa. It undergoes a process in which its volume becomes four times its initial volume and its pressure decreases to 450 hPa. If air is considered an ideal gas and if the process obeys ..
A 75 g Frisbee is thrown from a point 1.2 m above the ground with a speed of 14 m/s. find the reduction in Emec of the Frisbee-Earth system
An object is initially placed on the optical axis 27.1 cm to the left of a convex lens that has a focal length of 14.7 cm. The image is real and inverted. what is the new image distance
A spring with a spring constant of 85 N/m is stretched a distance of 0.45 m from its relaxed position. By how much does the spring's potential energy change
Two resistors (connected in series with each other) and a 18 Vbattery are connected in a loop. The voltage drop across the firstresistor is 7 V. What is the voltage drop across the secondresistor?
The springs of a 1400 kg car compress 4.0 mm when its 68 kg driver gets into the driver's seat. If the car goes over a bump, what will be the frequency of vibrations
An electric motor rotating a workshop grinding wheel at a rate of 118 rev/min is switched off. Suppose the wheel has a constant negative angular acceleration of magnitude 2.20 rad/s2.
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