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Assume that you are given the choice among two life preservers that are identical in size, the first a light one filled with Styrofoam and the second a very heavy one filled with gravel. If you submerge these life preservers in the water, upon which will the buoyant force be greater? Upon which will the buoyant force be ineffective?
At a distance of 7.00×10^12 m from a star, the intensity of the radiation from the star is 15.1 W/m^2. Assuming that the star radiates uniformly in all directions, what is the total power output of the star?
Two resistors of resistance R are connected in parallel. The combination is connected in series to a resistor of resistance 2R. What is the resistance of this combination of resistors
Two rigid rods are oriented parallel to each other and to the ground. The rods carry the similar current in the same direction. The length of each rod is 0.90 m, and the mass of each is 0.062 kg. One rod is held in place above the ground, while the o..
A solenoid 1.30 m long and 2.70 cm in diameter carries a current of 12.0 A. The magnetic field inside the solenoid is 15.0 mT. Find the length of the wire forming the solenoid
to ensure a tight fit cylindrical metal elements are sometimes made the same size or even slightly larger than the
An image of a biological sample is to have a resolution of 5 nm. (i) What is the kinetic energy of a beam of electrons with a de Broglie wavelength of 5.0nm.
A girl with a mass of 40 kg is swinging from a rope with a lengthof 2.2 m. What is the frequency of her swinging
A rod of length 30.0 cm has linear density (mass per length) given by l 5 50.0 1 20.0x, What is the mass of the rod
For a certain change, the value of ëU is -2.37 kJ. During the change, system absorbs 650 joules. How much work did the system do.
How does hydrogen bonding affect large molecules like proteins? What shapes do proteins take because of this effect?
Oppositely charged parallel plates are separated by 5.35 mm. A potential difference of600 V exists between the plates. What is the magnitude of the electric field strength between the plates?
A luggage handler pulls a 21.0 kilogram suitcase up a ramp inclined at 24.0 degree above the horizontal by a force of magnitude 146 N that acts parallel to the ramp. Find the work done on the suitcase by the friction force
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