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A box weighing 600 N is at rest on a ramp at an angle of 32.5o with the horizontal. The coefficient of static friction between the box and ramp is 0.800. Find the minimum force required to move the box down the ramp if the force is applied
(a) parallel to the ramp;
(b) horizontally.
The potential difference across a cell membrane form outside to inside is initially at -90 mV (when in its resting phase). How many ions move through the membrane
An electric train operates on 740 V. What is its power consumption when the current flowing through the train's motor is 1,970 A
A 0.80 kg body oscillates on a spring that, when extended 3.0 mm from equilibrium, has a restoring force of 5.0 N. find the angular frequency of oscillation
A loudspeaker of mass 23m is suspended a distance of h = 1.20 m below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 2.9m.
transverse waves with a speed of 59.0 ms are to be produced on a stretched string. a 4.95-m length of string with a
A 6.0 kg mess kit sliding on a frictionless surface explodes into two 3 kg parts, one moving at 1.5 m/s, What was the original speed of the mess kit
A certain man has skin tissue with the following characteristics: thickness of skin tissue, 3.88mm; surface area, 1.75m^2. estimate the temperature at the surface of the mans skin
The telescope at Yerkes Observatory in Wisconsin has an objective whose focal length is 19.4 m. Its eyepiece has a focal length of 10.0 cm. What is the angular magnification of the telescope
Billiard ball A of mass = 0.130 moving with speed = 2.80 strikes ball B, initially at rest, of mass = 0.150. Consequently of the collision, ball A is deflected off at an angle of 28.0 with the speed = 2.00.
A series RLC circuit is connected across a 10.0 kHz source. The 1.2 H inductor and 1000 ? resistor are fixed whereas the capacitor is variable. At what capacitance will the current in the resistor be a maximum
Suppose we rely upon friction between the wall and the rod to hold up the sign (there is no hinge attaching the rod to the wall). What is the smallest value of the coefficient of friction
Your telescope has a 700mm-focal-length objective and a 26-mm-focal-length eyepeice, You position film so that it caputures the image produced by the objective lens. What is the diameter of that image
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