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A speed skater moving across frictionless ice at 8.6 m/s hits a 5.5 m wide patch of rough ice. She slows steadily, then continues on at 6.5 m/s. What is her acceleration on the rough ice?
29.0g of copper pellets are removed from a 300?Coven and immediately dropped into 110mL of water at 23.0?C in an insulated cup. What will the new water temperature be
questiona professional race-car driver buys a car which can accelerate at 89.0 ms2. the racer decides to race beside
q1. a jewel thief hides a diamond by placing it on the bottom of a public swimming pool. he places a circular raft on
An inventor claims to have devised a cyclic engine which exchanges heat with reservoirs at 300 K and 540 K, and which can produce 450 J of work per 1000 J of heat extracted from the hot reservoir. Is his claim feasible.
What is decrease in kinetic energy throughout the collision.
The filament of a light bulb has a temperature of 3.48 x 103 °C and radiates 60.0 W of power. The emissivity of the filament is 0.253. Find the surface area of the filament
A 20.0-N block rests on a horizontal surface. The coefficients of static and kinetic friction between the surface, What is the force of friction acting on the block
q1. a 220 g block is attached to a horizontal spring and executes simple harmonic motion with a period of 0.150 s. if
A toboggan approaches a snowy hill moving at 10.9 m/s. The coefficients of static and kinetic friction between the snow and the toboggan are 0.470 and 0.320, Find the acceleration of the toboggan as it is going up the hill
An ideal which and pulley system is used to haul a box of books (m=50kg) up a ramp as shown in Figure 2. The ramp makes an angle of 20degree with respect to the horizontal. What is the value of the tension in the winch rope
a family wishes to purchase a heat pump for their home. The get-it-cheap co. sells a heat pump that has an operating performance 38% of the coefficient of performance of an ideal Carnot heat pump. Compute the overall coefficient of performance for ..
A particle with charge +3 nC is located at position A. Another particle with charge -4 nC is located at position B. What is the magnitude of the electric field at location B
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