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On an essentially frictionless, horizontal ice rink, a skatermoving at 2.0 m/s encounters arough patch that reduces her speed by 49% due to a friction force that is 26% of her weight. Use the work—energy theorem to find the length of this rough patch.
A 120-V(RMS) space heater has two power settings: 750 W and 1500 W. What is the resistance of the lower power setting
A high diver leaves the end of a 5.0 m high diving board and strikes the water 1.4 s later, 2.6 m beyond the end of the board. determine the maximum height (in meters) above the water reached
A 50.0 kg skier is at the top of a slope. At the initial point at the top is 25.0 m vertically above point at the bottom. find the change in Potential energy of the skier-Earth system as the skier goes from top to bottom
Consider an optical gain medium that has two levels at E 1=1.50 eV and E 2=3.50 eV. What is the resonant absorption wavelength
A hot-air balloonist, rising vertically with a constant velocity of magnitude v= 5.00 m/s, releases a sandbag at an instant when the balloon is a height h= 40.0 m above the ground. Compute the position of the sandbag at a time 1.50 s after its rele..
An object weighing325N in air is immersed in water after being tied to a string connected to a balance. The scale now reads265N. Find the density of the object
In designing rotating space stations to provide for artificial-gravity environments, one of the constraints that must be considered is motion sickness. Studies have shown that the negative effects of motion sickness begin to appear when the rotati..
Consider a thin spherical shell with surface charge density σ = σoCosθ and radius R centered about the origin (x=y=z=0). Here σo is a constant.
An object with mass m1 = 8 kg traveling with an x-velocity of V1x = 15/17 collides with an object with mass m2 = 12kg traveling with an x-velocity of V2x = - 15/13, Find the other object's x-velocity
An air filled parallel plate capacitor has plates of area 5.0cm^2 each, separated by 0.30 mm with a dielectric of constant 3.4. The capacitor is connected to a 3.0V battery. Find the value of its capacitance
A Carnot engine has an efficiency of 0.361, and the temperature of its cold reservoir is 406 K. (a) Determine the temperature of its hot reservoir. (b) If 5950 J of heat is rejected to the cold reservoir, what amount of heat is put into the engine..
A 20.0 gram bullet is shot horizontally into a 2.00 kg block and quickly becomes imbedded in the block. How much energy is dissipated in the block during the impact
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