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In a lightning bolt, a large amount of charge flows during a time of 1.6 x 10-3 s. Assume that the bolt can be represented as a long, straight line of current. At a perpendicular distance of 28 m from the bolt, a magnetic field of 8.7 x 10-5 T is measured. How much charged has flowed during the lightning bolt?
Two point charges q1= 2.0x10^-6 C and q2= -3.0x10^-6 C, Find the electric field and the electric potential at a point on the x-axis
Billy is running on level ground with a speed of 3.5 m/s. He attempts to jump a ditch that is 1.5 meters wide. if the horizontal component of his velocity does not chance.
What is the pressure (in kPa) exerted by an object that has a base which is 2cm by 4cm nd a weight of 45N.
Rank the voltage across each cylinder. A baseball is seen to pass upward by a window 15 m above the street with a vertical speed of 18 m/s. imagine the ball was thrown from the street. What was it's initial speed.
A door of width 1.0 and height 2.0 weighs 279 and is supported by two hinges, one a distance 0.500 from the top and the other a distance 0.50 from the bottom. Each hinge supports half the total weight of the door.
An object is found to have a weight in air of 500N. It is then tied to a string connected to a balance and immersed in water (density of water is 1000 kg/m3). The scale now reads 450 N. at last the object is immersed in oil and is found to have a ..
It's possible to use the ideal-gas law to show that the density of the earth's atmosphere decreases exponentially with height, Determine the value of z0
A horizontal string of length 1.5 meters vibrates with a wave velocity of 1230 m/s at its fundamental frequency.
A 1000 {rm kg} wrecking ball hangs from a 15 {rm m}-long cable. The ball is pulled back until cable makes an angle of 25.0^circle with the vertical. By how much has the gravitational potential energy of the ball changed .
A helicopter is ascending vertically with the speed of 8 m/s. At a height of 65m above the Earth, a package is dropped from a window.
A uniform plank of length 4.9m and weight 228N rests horizontally on two supports, with 1.10m of the plank hanging over the right support. To what distance x can a person who weighs 449N walk on overhanging part of the plank before it just begins ..
An airplane is flying with a velocity of 93.0 m/s at an angle of 22.0^circ above the horizontal. When the plane is a distance 119 m directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment.
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