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A playground merry-go-round of radius R = 1.60 m has a moment of inertia I = 275 kg · m2 and is rotating at 8.0 rev/min about a frictionless vertical axle. Facing the axle, a 27.0-kg child hops onto the merry-go-round and manages to sit down on the edge. What is the new angular speed of the merry-go-round?
rev/min
A glass window pane is exactly 20 cm by 36 cm at 10oC. By how much has its area increased as it temperature is 33oC, assuming that it can expand freely? Take the coefficient of thermal expansion for the glass to be exactly 9 x 10-6/Co.
A bunch of grapes is placed in a spring scale at a supermarket. The grapes oscillate up and down with a period of 0.65 s, What is the mass of the grapes
Find out the angle that the total acceleration of the car. the car at the moment the car completes the circle.
The resistance of a 9 H inductor is 90.0 ohms, What is the final steady current in the circuit
The resistance of a copper wire of length L meter is 0.1 ohms. If the diameter of the wire is 0.045cm, find out its specific resistance.
find the minimum thickness for constructive interference of visible light with a wavelength of 595 nm.
If the activation energy for the vacancy formation is given as 0.77 eV for aluminium at (650 degrees Celcius) ^3, what would be the number of vacancies at 650 degrees Celsius? The atomic weight and the density of aluminium is 26.98 g/mol and 2.62 ..
For silver electrode (hint: click just below the word "cesium"), what is the highest energy of an electron ejected by light of 250 nm.
An amateur radio operator wishes to build a receiver that can tune a range from 13.8 MHz to 15.1MHz, What is the required value of the constant inductance
A uniform magnetic field of 0.50 T is directed along the positive x axis. A proton moving with the speed of 60 km/s enters this field. The helical path followed by the proton shown has a pitch of 5.0 mm. find the angle between the magnetic field an..
What is the magnitude of the potential difference between two points that are 1.15 cm and 2.99 cm from a proton? Answer in units of V.
The car now stops, and the four people get out. By how much does the car body rise on its suspension owing to this reduce in weight.
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