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A rolling ball moves from x1 = 3.4cm to x2 = -4.2cm during the timefrom t1 = 3.0s to t2 = 5.1s. What is its average velocity?
You have a mechanism by which you can use a magnetic spectrograph to chose the energy of the beta rays from a 137Cs source. What thickness of the brass foils in g/cm2 does it take to stop the 0.8 MeV beta rays
question1to measure weight of the cat a person places a 100 n box and a 60 n box from the ends of a uniform pole that
the drawing shows two situations in which charges are placed on the x and y axes. they are all located at the same
question a gass has 100 j of energy in the form of heat is transfered to a system and the system does 150 j of work
the intensity of laser light of 620 nm wavelength incident on a solid surface with a work function of 0.5 ev is doubled. By what factor does the kinetic energy of the electrons increase
A point charge at the origin of a coordinate system produces the electric field E = (36000 N/C)x on the x axis at the location x = -0.50 m.
What is the magnitude of the total linear acceleration of a piece of metal on the very outer edge of the flywheel 4.1 seconds after it started to rotate
An interesting (but over simplified) model of an atom pictures anelectron "in orbit" around a proton. Suppose this electron ismoving in a circular orbit of radius 0.21 nm (2.1 x10-10) and the force that makes this circular motion possible is the el..
A rod of 2.0-m length and a square (2.0 mm x 2.0 mm) cross section is made of a material with a resistivity of 6.0 x 10 ^-8 ohms m. What is heat generated in the rod
A closed box is filled with dry ice at a temperature of -80.4 oC, while the outside temperature is 20.8 oC. Find the thermal conductivity of the material from which the box is made
A small rocket to gather weather data is launched straight up. Several seconds into the flight, its velocity is 120 m/s, What is the net force on the rocket
three charges each of magnitude 8 nc are at separate corners of a square of edge length 2 cm. the two charges at
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