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An astronaut is connected to her spacecraft by a 25-m-long tether cord as she and the spacecraft orbit Earth in a circular path at a speed of 3.0 x103 m/s. At one instant, the voltage gauged between the ends of a wire embedded in the cord is gauged to be 0.45V. Assume the long dimension of the cord is perpendicular to the vertical component of Earth's magnetic field at that instant. (a) What is the magnitude of the vertical component of Earth's field at this location? (b) Does the gauged voltage change as the system moves from one location to another?
A factory worker pushes a 31.0 kgcrate a distance of 6.5 m along alevel floor at constant velocity by pushing horizontally on it. The coefficient of kinetic friction between the crate and floor is0.25.
Blue light of frequency 6.0 1014 Hz falls on the surface of potassium, which has a work function of 2.26 eV. Find the maximum kinetic energy of emitted electrons
A blu-ray disc has mass of 20 g and is 12 cm in diameter. The fastest drives can spin the disc at 10000 RPM after uniformly accelerating it for 1 sec. Find the net torque on the disc
A metal sphere centered at the origin has a surface charge density that has a magnitude of 24.1 nC/m2 and a radius less than 2.00 m. What is the sign of the charge on the sphere
particle a of charge 4.00 10-4 c is at the origin particle b of charge -5.00 x 10-4 c is at 7.00 m 0 and particle c of
Two point charges are located on the axis as follows: charge = -2.00 at = -0.500 , and charge = 2.80 at the origin ( = 0). What is the magnitude of the net force exerted by these two charges on a third charge = 9.00 located at = 0.250?
A flat circle of radius 20 cm is placed in a uniform electric field of magnitude 6.6×102N/C, What is the electric flux through the circle when its face is at 30 to the field lines
Find out the magnitude of the truck's vertical component of displacement, answer in units of meters.
A convex spherical mirror by a radius of curvature of19.5 cm produces a virtual image one fourth the size of the real object. Where is the object?
A merry-go-round (carousel) with a moment of inertia of 594 kg·m2, is initially rotating horizontally at 2 rad/s about a frictionless axis through its center.
Two parallel slits are illuminated with light composed of two wavelengths, one of which is 645 nm. On a viewing screen, the light whose wavelength is recognized produces its third dark fringe at the same place where the light whose wavelength is unk..
A ball is thrown vertically upward with a speed of 15.0 m/s. (a) How high does it rise? m (b) How long does it take to reach its highest point? s (c) How long does the ball take to hit the ground after it reaches its highest point? s (d) What is i..
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