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A model train moves along horizontal circular track with radius of 0.5 m. Starting from rest, the train accelerates at 0.2 m/s2. Describe at is the angular acceleration (in rad/s2) of the train?
An electron entering Thompson's e/m apparatus has an initial velocity( in the horizontal direction only) of (5.00*10^6)m/s. the magnet used in the apparatus has a strength of 15.0mT. (a.) what electrical field will you need in order to produce zer..
For two stars of the same surface temperature, how does their relative luminosity depend on their radii
A 5100 kg iceberg with density 931 kg/m3 is afloat in seawater with density 1030 kg/m3, Find the buoyant force on the iceberg
The intensity of the Sun's light in the vicinity of the Earth is about 930 W/m2. Imagine a spacecraft with a mirroredsquare sail of dimension 1.22 km. Estimate how much thrust (innewtons) this craft will experience due to collisions with theSun's ..
A wind turbine with a rotor diameter of 50 m is rated at 2500 kW at a hub height wind speed of 10 m/s. Calculate the number of hours per year that the wind is below the cut-in speed
The side-view mirror of an automobile has a radius of curvature of 15.0 cm. The mirror produces a virtual image one-third the size of the object. How far is the object from the mirror?
A 0.50-?F and a 1.4-?F capacitor (C1 and C2, respectively) are connected in series to a20-V battery, lculate the potential difference across each capacitor? V1 and V2
The concrete encloses one steel reinforcing rod with cross-sectional area 1.00cm2. The rod joins two strong end plates. The cross-sectional area of the concrete perpendicular to the rod is 47.5 cm2. Young's modulus for the concrete is 3.00 x 10^10 N/..
Two loudspeakers, 5.0 m apart and facing each other, play identical sounds of the same frequency, What is the frequency of the sound (in Hz)
A force applied to an object of mass m1 produces an acceleration of 3.60 m/s2. find its acceleration under the action of the force
What must be the area of a suction cup that is completely evacuated and a ceiling if the cup is to support a child who weighs 30 kg
You lower a weight of metal in a beaker filled with water standing on a scale. When metal weight hangs above the water weighs 179.6 grams, What is the metal weights density
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