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A total of 4.27·106 electrons are placed on an initially uncharged wire of length 3.41 m. What is the magnitude of the acceleration of a proton placed at a point in space, which is a perpendicular distance of 0.754 m away from the midpoint of the wire?
A high-voltage power line carries a current of 140 at a location where the Earth's magnetic field has a magnitude of 0.59 G and points to the north, 69 below the horizontal.
A compact disc, initially at rest, is spun up to an angular velocity of 22 rad/s by a constant angular acceleration of 4.0 rad/s^2. How much time does the disk take to reach maximum velocity
A satellite of mass 240 kg is in a circular orbit of radius 8.68 x106 m around a planet. If the period is 9030 s, what is the mechanical energy of the satellite
How much work is done by the Moon's gravitational field as a 1065 kg meteor comes in from outer space and impacts on the Moon's surface
The perihelion distance from the sun for the planet Uranus is 2.750E9 km; the aphelion distance is 3.000E9 km. Calculate the eccentricity of the orbit of Uranus
A lamp is placed 10 cm in front of a concave spherical mirror that forms an image of the filament on a screen placed 3.0 m from the mirror. What is the radius of curvature of the mirror
A uniform rod of mass 3.20×10?2 and length 0.430 rotates in a horizontal plane about a fixed axis through its center and perpendicular to the rod. Two small rings, each with mass 0.190 , are mounted so that they can slide along the rod.
A 723-N person stands on a uniform board of weight 282 N and length 6.1 m. How far from the left end of the board is the person standing
A 134g baseball moving 28.6 strikes a stationary 5.20kg brick resting on small rollers so it moves without significant friction. What is the baseball's speed after the collision
A galvanometer has a coil resistance of 100 ohms and gives a full scale deflection when the potential difference across it is 0.0005 V. What size resistor (with a value measured in ohms) is required
The positioin of a particle moving along the x-axis is given by x =( 21+22t-6t^2)m, where t is in s. What is the average velocity during the time interval t= 1.0 s to t = 3.0s
An ideal gas at 20 ?C consists of 2.2×1022 atoms. 5.9J of thermal energy are removed from the gas. What is the new temperature in ?C
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