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Two springs with spring constants k1 and k2 are put togetherend-to-end. Let x1 be the amount by whichthe rst spring is stretched relative to its equilibrium length, andsimilarly for x2. If the combineddouble spring is stretched by an amount brelativeto its equilibrium length, then b= x1 + x2. Find the spring constant,K, of the combined spring in terms ofk1 and k2.
A 60.0-kg skater begins a spin with an angular speed of 6.0 rad/s. By changing the position of her arms, the skater decreases her moment of inertia by 50%. Find the skater's final angular speed?
An engine absorbs 1.74 kJ from a hot reservoir at 277°C and expels 1.21 kJ to a cold reservoir at 27°C in each cycle. How much work is done by the engine in each cycle
A woman holds a tube of lipstick 9 cm from a spherical mirror and notices that the image of the tube is upright and one fourth its normal size. Calculate the focal length of the mirror
You find an unlabeled box of fine needles, and want to determine how thick they are. What is the diameter of the needle
A 530.0g bird is flying horizontally at 2.20m/s, not paying much attention, when it suddenly flies into a stationary vertical bar, What is the angular velocity of the bar just after it is hit by the bird
A coating is applied to a lens to minimize reflections. The index of refraction of the coating is 1.66 and that of the lens is 1.56. what is the largest wavelength that is minimally reflected
Relationships between wavelength, frequency and speed.
A bottle has a mass of 35.00g when empty and 98.44g when filled with water. When filled with another liquid, the mass is 88.78g. What is the specific gravity of this other fluid
An electric heater used to boil small amounts of water consists of a 15-Ω coil that is immersed directly in the water. Itoperates from a 120-V socket. How much times is required for this heater to raise the temperature of 0.5 kg of water from 13de..
Suppose 0.0330 kg of steam (at 100.00°C) is added to 0.330 kg of water (initially at 21.1°C.). Find the final temperature (in °C) of the water after equilibrium is reached
a girl is using a rope to pull a box that weighs 300 N across a level surface with constant velocity. what is the normal force of the floor on the box
Light has a wavelength of 600nm in a vacuum. It passes into glass, which has an index of refraction of 1.50. What is the WAVELENGTH of the light in the glass
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