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1)An object with negative charge is placed in a region of space where the electric field lines is directed vertically upward. What is the direction of the electric force exerted on this charge? 2. A free electron and a free proton are released in identical electric fields. How do the magnitudes of the electric force exerted on the two particles compare?
3) A water droplet of mass 3.00 * 10- 12 kg is located in the air near the ground during a stormy day. An atmospheric electric field of magnitude 6.00 * 103 N/C points vertically downward in the vicinity of the water droplet. The droplet remains suspended at rest in the air. What is the electric charge on the droplet?
4)Three point charges lie along the x axis. The positive charge q1=15.0 µC is at x = 2.00 m, the positive charge q2= 6.00 µC is at the origin, and the net force acting on q3 is zero. What is the x coordinate of q3?
5)Consider two electric dipoles in empty space. Each dipole has zero net charge. (a) Does an electric force exist between the dipoles; that is, can two objects with zero net charge exert electric forces on each other? (b) If so, is the force one of attraction or of repulsion?
Two forces, F? 1 and F? 2, act at a point. F? 1 has a magnitude of 8.20N and is directed at an angle of 60.0, What is the x and component of the resultant force
what must the charge sign and magnitude of a particle of mass 1.47 g. be for it to remain stationary when placed in a
An underwater camera has a lens of focal length 35 millimeter and a maximum aperture of f/2.80. Find the width of the smallest resolvable detail on the subject if the object is a fish underwater with the camera in the water
In a wire of radius R = 3.40 mm the magnitude of the current density is J = Ar/R, where r is the radial distance out from the central axis. What is the total current in the wire
An object is 23.5 centimeter from the center of a silvered spherical glass Christmas tree ornament 6.35 centimeter in diameter. Compute what is the position of its image
A horizontal turntable is made from a uniform solid disk and is initially rotating with angular velocity of 7.5 rad/s about a fixed vertical axis through its center. What is the mass of the turntable
Suppose the mean radius of a planet is 6.79 *10^6 m, and that of its moon is 1.80 * 1^8 cm. From these data calculate the following. Recall that the surface area of a sphere is 4pir 2 and the volume of a sphere is below. Find the ratio of the plan..
A near-sighted person might correct his vision by wearing diverging lenses with focal length f = -60cm. use ray tracing to determine the height of the image
A person who weighs 616 N is riding a 108-N mountain bike. find the area of contact between each tire and the ground
A 0.24-kg ball on a stick is whirled on a vertical circle at a constant speed. calculate the tension in the stick
A 6.0 V battery is connected to two 7.90 kilo-Ohm resistors in series. An ammeter of internal resistance 0.530 Ohm gauges the current and at the same time a voltmeter with internal resistance 16.5 kilo-Ohm gauges the voltage across one of the 7.90 ki..
What is the anomalous thermal expansion property of water? Does it have a negative expansion or positive expansion?
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