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A 21.7-kg child descends a slide 3.5 m high and reaches thebottom with a speed of 2.2 m/s. How much thermal energy due tofriction was generated in this process?
A man lifts a 20.0-kg bucket of concrete from the ground up to the top of a 20.0-m tall building. How much work was done by the man in lifting the bucket
An air-track glider attached to a spring oscillates with a period of 1.50s . At t=0s the glider is 5.20cm left of the equilibrium position, calculate the phase constant
In a friction experiment, your wooden plank is horizontal. When a mass of 100 grams is hanging on the weight hanger of mass 50 grams, what is the coefficient of kinetic friction
Consider an object on an incline where friction is present. The angle between the incline and the horizontal is ? and the coefficient of kinetic friction is ?k. Find an expression for the acceleration of this object
Which vector has the largest x component and y component
A reflecting telescope has a main mirror with fM = 620 mm. If an eyepiece with a magnification of 15 is used, what is the total magnification of the telescope
A plate carries a charge of -2 ?C, while a rod carries a charge of 3.50 ?C. How many electrons must be transferred from the plate to the rod
Big yellow fish swimming at 2.0m/s swallows little green fish at rest. Big yellow fish is 3 times as massive as little green fish. What fraction of big yellow fish's initial kinetic energy was lost in this collision
q1 = -2 ?C is at (-5cm, 3cm) and q2 = +8?C is at (0,0). Find the x component of the electric force exerted on q2 due to q1
An object with a height of 42 cm is placed 2.3 m in front of a concave mirror with a focal length of 0.55 m. Find the location and magnification of the image produced by the mirror
A cylindrical flask is fitted with an airtight piston that is free to slide up and down, as shown in the figure below. A mass rests on top of the piston. The initial temperature of the system is 313 K and the pressure of the gas is held constant at 1..
When two identical ions are separated by a distance of 8.6×10?10 m, How many electrons are missing from each ion
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