An electric field of magnitude 5.25 x 10' n/c points due south at a certain location. find the magnitude and direction of the force on 3-5.85 c charge at this location. magnitude in direction -selech four point charges are located at the corners of a square. each charge has magnitude 3.10 nc and the square has sides of length 2.10 cm. find the magnitude of the electric field in n/c) at the center of the square if all of the charges are positive and three of the charges are positive and one is negative. hint (a) all the charges are positive nc (b) three of the charges are positive and one is negative n/c

Scientists use laser range-finding to measure the distance to the moon with great accuracy. a brief laser pulse is fired at the moon, then the time interval is measured until the "echo" is seen by a telescope. a laser beam spreads out as it travels because it diffracts through a circular exit as it leaves the laser. in order for the reflected light to be bright enough to detect, the laser spot on the moon must be no more than 1.0 km in diameter. staying within this diameter is accomplished by using a special large-diameter laser. part a if λ = 540nm , what is the minimum diameter of the circular opening from which the laser beam emerges? the earth-moon distance is 384,000 km. express your answer to two significant figures and include the appropriate units.

Which statement correctly describes a step-up transformer? a. it increases the amount of electric energy available. b. it increases the voltage of an electric current. c. it changes direct current into alternating current. d. it has more loops of wire in its primary coil.

Which statement is best supported by the information in the chart? wave y is moving the fastest. wave x is moving the fastest. all of the waves are moving at the same speed. all of the waves have the same value of wavelengths per second.