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A man is standing on crutches. Suppose that the force exerted on each crutch by the ground is directed along the crutch. If the coefficient of static friction between the ground and a crutch is 0.90, find the largest angle θmax that the crutch can have just before it begins to slip on the floor.
Find the minimum aperture diameter of a camera that can resolve detail on the ground the size of a person (1.5m ) from an SR-71
A skater glides along a circular path. She defines a certain point on the circle as her origin. Later on, she passes during a point at which the distance she has traveled along the path from the origin is smaller than the magnitude of her displacemen..
A ship has a mass of 40000 kg. its energy gives it an acceleration of 0.27 m/s while it travels a distance of 105 meters from rest. what force does the engine exert on the ship.
Radio telescopes use radio waves (instead of light) to produce images. what is the best possible angular resolution that can be achieved
An electron moves in a circular path perpendicular to a constantmagnetic field with a magnitude of 5.00 mT. The angular momentum of the electron about the center of the circle is 2.50multiplied by 10-25J·s.
An element in its solid phase has mass density 2100kg/m3 and number density 4.39×1028atoms/m3. What is the element's atomic mass number
A small, plastic sphere of mass m = 111 g is attached to a string There is an electric field of 122 N/C directed along the + x axis
Sketch a ray diagram for a concave mirror with an object atD0=R. Is the image real or virtual? What is the image inverted or upright? Is the image size is magnified, reduced or same size?
The cooper windings of a motor Have a resistance of 55 ohms at 20 degrees C when the motor is idle. What is the temperature in degrees Of the windings
A skier starts from rest at the top of a frictionless incline of height 20.0 m, Find the skier's speed at the bottom
a member of an aircraft maintenance crew wears protective earplugs that reduce the sound intensity by a factor of 325.
A string vibrates according to the equation y=5sin(pi*x)/3 cos(40pi*t), where x and y are in centimeters and ti is in secons. What is the distance between nodes
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