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Two particles with equal mass have positive charges of 1.0 microCoulombs and 1.0 nanoCoulombs. What is their mass if their mutual gravitational attraction balances their Coulomb repulsion? Why is the answer independent of the distance between the particles?
in your opinion is the earth warming? to what extent do you believe this warming is a result of human activity?your
A baloon 1.2 g when empty has volume 800 cm ^3 and is filled with helium. density of air is 1.29 kg/m^3 while that of helium is .179 kg/m, calculate acceleration of balloon
While running, a person dissipates about 0.60 J of mechanical energy per step per kilogram of body mass, how fast is the person running
a photocell that detects the amount of light transmitted through the finger at each wavelength. Identify the frequency of each of these light sources. If 66% of the energy of the red source is absorbed in the blood, by what factor does the amplitu..
question1a hiker makes four straight-line walks a 20 km at 274o b 12km at 48onbspc 33 km at 150onbspd 30km at 20onbspin
A convex lens with a 10-cm focal length is in front of a concave lens with a 10-cm focal length. The lenses are separated by 40 cm. Where is the final image with respect to the convex lens
The force stretching the D string on a certain guitar is 156 N. What is the speed of the waves on the string
A microscope has an objective lens with a focal length of 2.0cm, an eyepiece with a focal length of 0.25 cm, What is the magnification of the microscope
find the work done by the field on the electron. What is the change in potential energy associated with the electron.
A stone is thrown upward from the top of a building at an angle of 30.0° to the horizontal and with an initial speed of 19.0 m/s, Find the horizontal range of the stone
A piece of a wire, with the cross-sectional area of 0.5176 mm2 and 1.80 m long, What is the resistivity of the material of the wire
A 25 kg trunk strikes the ground with a speed of 12.5m/s. if no energy is lost from air resistance, what is the height from which trunk fell.
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