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What is the line charge density on a long wire if the electric field 44 cm from the wire has magnitude 220 kN/C and points toward the wire?
A child's water pistol shoots water through a 1.0 mm -diameter hole. If the pistol is fired horizontally 80 cm above the ground, a squirt hits the ground 1.2m away. What is volume flow rate during t
The great, gray-green, greasy Zambezi River flows over Victoria Falls in south central Africa. The falls are approximately 108 m high. If the river is flowing horizontally at 3.60 m/s just before go
A jogger runs 100 m due west, then changes direction for the second leg of the run. At the end of the run, she is 175 m away from the starting point at an angle of 15.0 degrees north of west. What w
A -3.07 μ C charge is placed at the center of a conducting spherical shell, and a total charge of +7.30 μC is placed on the shell itself. Calculate the total charge on the outer surface of the
Two carpenters are hammering at the same time, each at a different hammering frequency. The hammering frequency is the number of hammer blows per second. Every 4.6 s, both carpenters strike at the s
A projectile is launched at an angle of 32 degrees to the horizontal at a speed of 322 m/s. Assuming g = 9.81 m/s2, what is the projectiles maximum height and horizontal range? Stuck determining time
A solid sphere of radius a=10cm is concentric with a spherical conducting shell of inner radius b=20cm and outer radius c=24cm. The sphere has a net uniform charge q1=+10μC; and conducting shell
A cargo barge is loaded in a saltwater harbor for a trip up a freshwater river. If the rectangular barge is 3.50 m by 24.0 m and sits 0.600 m deep in the harbor, how deep will it sit in the river?
How many electrons must be removed from each of two 4.3-kg copper spheres to make the electric force of repulsion between them equal in magnitude to the gravitational attraction between them?
A pendulum is made of a uniform stick of length L. It is allowed to swing in a vertical plane. Where should the pivot be placed on the stick so that the frequency of (small) oscillations is maximum?
The cubes are lined up from left to right and a force is applied to the left side of the left cube causing all three cubes to accelerate to the right at 2.0 m/s2. What is the magnitude of the force
A truck covers 40.0 m in 9.20 s while smoothly slowing down to a final velocity of 2.60 m/s. (a) Find the truck's original speed. ______ m/s
The average person passes out at an acceleration of 7g (that is, seven times the gravitational acceleration on Earth). Suppose a car is designed to accelerate at this rate. How much time (in seconds
Assume that a particular person's skin is found to have a resistance of 1 x 10^5O when dry and 1400O when wet. How much current will flow into the body on contact with a 120 V household AC outlet wi
A point charge of 4 C is located at x = 2 m, y = 3 m. A second point charge of -4 C is located at x = 2 m, y = -1 m. Calculate the magnitude and direction of the force on an electron at x = -3 m, y =
Alan leaves LA at 8am to drive to SF, 400mls away. he travels at a steady 50mph. Beth leaves LA at 9am and drives a steady 60mph. who gets to SF first? how long does the first to arrive have to wait
A 80 kg student consumes 2500 cal each day and stays the same weight. One day, he eats 3500 cal and, wanting to keep from gaining weight, decides to "work off" the excess by jumping up and down. Wi
A Ferris Wheel has a radius of 11.0 m and rotates once every 11.0 s. What is the force of the chair seat on you at each of the three positions, top, side, and bottom? Answer as a multiple of your we
In a television tube, electrons initially at rest are accelerated by a uniform electric field of magnitude 4.0 times 105 N/C during the first 5.0 cm of the tube's length; then they move at essentiall
How far does she need to extend the "tuning joint" of her flute to be in tune with the tuning fork?
Find the direction of force on an electron at x=-1,y=0.[Answer should be in degrees. (counterclockwise from plus x axis) ].
Suppose that the electric potential outside a living cell is higher than that inside the cell by 0.069 V. How much work is done by the electric force when a sodium ion (charge = +e) moves from the o
What wavelength is required to get 5 standing wave segments on a doubly fixed string of length 0.75m? If the velocity v is 50m/s, what will be the frequency of this wave?
A marble spins in a vertical plane around the inside of a smooth, 20-cm-diameter horizontal pipe. The marble's speed at the bottom of the circle is 3.0 m/s. A) What is the marble's speed at the top?