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A kid of mass 20 kg is playing with a swing by an arm length of 5 m. His sister first pushes him such that the maximum angular deviation from vertical position is 0.2 radians (11.46 deg.). The kid then enjoys the swing as it oscillates. After ten cycles, the maximum angular deviation is reduced with a factor of e. What is a quality factor Q of the swing? If the sister has to push the kid on every cycle to maintain a constant maximum angular deviation of 11.46 deg., how much work must the sister do on every push?
A stamp collector uses a lens with 7.5-cm focal length as a simple magnifier. The virtual image is produced at the normal near point (25 cm). What is the expected angular magnification
A lens of focal length +1.25 cm is used as a simple magnifier by holding outside the eye. what is the angular magnification
At the end of a factory production line, boxes start at rest and slide down a 30 degree ramp 5.4 long. find the maximum allowed frictional coefficient
Ground beef may be irradiated with high-energy electrons from a linear accelerator to kill pathogens. In a standard treatment, 2.0 kg of beef receives 4.5 kGy of radiation in 48 s. (A) How much energy is deposited in the beef in kJ? (B) What is the a..
A proton moves perpendicular to a uniform magnetic field at a speed of 1.40 107 m/s and experiences an acceleration of 2.60 1013 m/s2 in the positive x-direction when its velocity is in the positive z-direction. Determine the magnitude and direction ..
A 0.100 kg block is suspended from a spring. When a small pebble of mass 40 g is placed on the block, What is the net force on the pebble when it is at a point of maximum upward displacement
An isolated capacitor of unknown capacitance has been charged to a potential dissimilarity of 200 V. When the charged capacitor is disconnected from the battery and then connected in parallel to an un charged 10.0 µF capacitor, the voltage across the..
Consider an electron in a hydrogen atom, which is 0.050 nm from the proton in the nucleus, What electric field does the electron experience
A "bug-zapper" uses a voltage of 4000V provided by a transformer that is connected to a standard household source of 120V. what current is drawn from the house current and what is the power required
A sculpture is 4.00 m tall and has its CG located 1.80 m above thecenter of its base. To what angle can the sculpture be tipped before it fallsover
A car of mass 1500 kg rounds a circular turn of radius 20m. how fast can the car travel without skidding
Calculate the mass of the sun from the radius of the earth's orbit (1.50×1011 m), the earth's period in its orbit, What is the density of the sun
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