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Compute the force required to push liquid oil, with the density of 890 kg/m3, through a 1 millimeter diameter hole.
Two spherical objects with a mass of 5.26 kg each are placed at a distance of 3.95 m apart. How many electrons need to leave each object
A simple pendulum is swinging back and forth during a small angle, its motion repeating every 1.18 s. How much longer must the pendulum be made in order to increase its period by 0.22s?
Find the rms speed of a helium molecule at 313 K. Find the rms speed of an iron atom of mass 55.9 u at 313 K. Find the rms speed of a pollen particle of mass 5.29 10-13 g suspended in water at a temperature of 313 K.
An originally uncharged 10-μF capacitor is charged by a10-V battery during a resistance R. The capacitor reaches a potential difference of 4 V in a period of 3 s after charging began. Find the value of R.
Assume that the electric field in the Earth's atmosphere is E = 1.40 x 102 N/C, pointing downward. Find what is the electric charge in the Earth
The half-life of Uranium(238 upper index 92 lower index) against alphy decay is 4.5x10^9 yr. How long does it take for seven-eigths of a sample of this isotope to decay
A person eats a dessert that contains 280 Calories. (This "Calorie" unit, with a capital C, is the one used by nutritionists; 1 Calorie = 4186 J.
The pressure-volume graph shows an engine cycle where the working substance is an ideal monatomic gas (? = 5/3). The process A-B is adiabatic. calculate the heat removed from the gas
A 1.90-cm-high object is situated 19.2 cm in front of a concave mirror that has a radius of curvature of 11.1 cm. Calculate the location and the height of the image
A circular coil having 19 turns and a radius of R = 19.2cm carries a current of 3.30A. It is placed in a uniform magnetic field of 62.0mT. What is the magnitude of the torque acting on the coil
A 110kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 350N. For the first 15.00 m the floor is frictionless and for next 15 m the coefficient of friction is 0.30. What is the final speed of the crate.
The frequncy doubled output of a laser has a wavelength of 532nm. If each pulse of light has a total energy of 0.550J and the repetition rate of the laser is 30Hz, how many photons does the laser emit at 532 nm in 3 minutes
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