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How does the elasticity of a material vary when the material is heated and annealed?
To measure the static friction coefficient between a 4.78-kg block and a vertical wall, the setup shown in the drawing is used. what is the coefficient of static friction
In the Bohr model of the hydrogen atom, the electron revolves in acircular orbit around the nucleus. obtain the centripetal acceleration of the electron
An electron with kinetic energy of 5 x 10-16 J is moving to the right along the axis of a cathode-ray tube as shown below. There is an electric field vector = (4 x 104 N/C) jhatbold in the region between the deflection plates. Everywhere else, vector..
A diffraction grating is made up of slits of width = 300 nm with separation = 1150 nm. The grating is illuminated by monchromatic plane waves of wavelength ? = 560 nm at normal incidence. How many maxima are there in the full diffraction pattern? Wha..
A uniform 2.95- kg spinning disk with a radius of 0.263 m is brought to rest by a brake-pad pressed against the side 0.205 m from the rotation axis. What frictional force was applied by the brake pad
A 1.0-C charge is 15 m from a second charge, and the force betweenthem is 1.0 N. What is the magnitude of the second charge?
two identical wheels are moving on horizontal surfaces. the center of mass of each has the same linear speed. however
A mass of 0.11 kg is initially at rest at an unknown position on the -x axis, xi. It begins accelerating towards x=0, with a constant acceleration of 3.30 m/s2 As it passes x= -7.40 m its speed is 4.90 m/s. Calculate the speed of the mass as it cr..
A 125 g mass starts from rest at the origin (at t = 0) and moves with a velocity of v = 2 t i - t3 j (t is in second and v is in m/s). Find the magnitude of the acceleration of the mass at t= 2 second
A certain car battery with a 12.0 V emf has an initial charge of 115 A·h. Assuming that the potential across the terminals stays constant until the battery is completely discharged, for how various hours can it deliver energy at the rate of 110 W.
The minimum distance required to stop a car moving at 42.0 mi/h is 39.0 ft. What is the minimum stopping distance for the same car moving at 67.0 mi/h, assuming the similar rate of acceleration.
A long horizontal wire carries 24 A of current due north. What is the net magnetic field 22 cm due west of the wire if the Earth's field there points downward, 42° below the horizontal, What is the magnitude of the net magnetic field 22.0cm due wes..
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