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An aluminum rod is 10.0 cm long and a steel rod is 80.0 cm long when both rods are at a temperature of 15°C. Both rods have the same diameter. The rods are joined end-to-end to form a rod 60.0 cm long. The coefficients of linear expansion of aluminum and steel are 2.4 x 10-5 K-1, and 1.2 × 10-5 K-1, respectively. The temperature is raised to 90°C. The increase in the length of the joined rod, in mm, is closest to?
As an energy-efficiency consultant, you're asked to assess the pumped-storage facility. Its reservoir sits 136 above its generating station and holds 9.0×10^9 of water. The power plant generates 315 of electric power while draining the reservoir over..
a basketball leaves a players hands at a height of 2.20m above the floor. the basket is 2.90m above the floor. the
upon what properties of the sound wave do the a loudness b pitch and c quality of a musical note depend? why do the
A war-wolf or trebuchet is a device used during the Middle Ages to throw rocks at castles and now sometimes used to fling large vegetables and pianos as a sport. A simple trebuchet.
When water freezes, it expands about 8.73%. What would be the pressure increase inside your automobile engine block if the water in it froze
An electron (charge -e) is projected horizontally into the space between two oppositely charged parallel plates. The electric field between the plates is 462N/C upward.
How much would a 80.0 kg person weight on Mars, where the acceleration of gravity is 3.93 m/s^2, and on Earths Moon, where the acceleration of gravity is 1.63 m/s^2.
A man pushes a 50N box across a level floor at a constant speed of 2.0 m/s for 10 s. Find the average power output by the man
if the radius of the equipotential surface of point charge is 13.5 m at a potential of 2.10 kv what is the magnitude of
When a potential difference of 144V is applied to the plates of a parallel-plate capacitor, the plates carry a surface charge density of42.0nC/cm2. What is the spacing between the plates?
an object is being dropped from a height h 86 meters above ground. assuming no air friction nor winda. show your
Two spherical objects with a mass of 6.86 kg each are placed at a distance of 3.06 m apart. How many electrons need to leave each object so that the net force between them becomes zero?
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