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(a) In unit-vector notation, what is the displacement of the penny from start to its landing point? (b) When the man returns to the origin, what is the magnitude of his displacement for the return t
A uniform line charge extends from x = - 2.7 cm to x = + 2.7 cm and has a linear charge density of = 5.9 nC/m. (a) Find the total charge. Find the electric field on the y axis at the following distanc
A certain elevator cab in a New York hotel has a total run of 180 m. Its maximum speed is 302 m/min. Its acceleration (both speeding up and slowing down) has a magnitude of 1.33 m/s2. (a) How far d
A uniformly charged plastic disk has a radius of 0.100 m. At what distance from the center along the central perpendicular axis is the magnitude of the electric field equal to one-half the magnitud
The charges on the circle are -4.74C at the position due north and +7.12C at the position due east. What is (a) the magnitude and (b) direction of the net electrostatic force acting on the charge at
A charge of -3.89C is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass (radius = 0.0809 m). The charges on the circle are -4.74C at the position due n
Calculate the magnitude of the torque on the dipole when the dipole moment has the following orientations. (a) parallel to the field N·m (b) perpendicular to the field N·m (c) antipara
How much work is required to turn an electric dipole 180° in a uniform electric field of magnitude E = 42.0 N/C if p = 2.50 10-25 C·m and the initial angle is 47°?
At a certain time a particle had a speed of 20 m/s in the positive x direction, and 2.2 s later its speed was 30 m/s in the opposite direction. What is the magnitude of the average acceleration of
The human eye can readily detect wavelengths from about 400 nm to 700 nm. If white light illuminates a diffraction grating having 810lines/mm, over what range of angles does the visible m = 1 spectr
(a) How far does the cab move while accelerating to full speed from rest? _____ m (b) How long does it take to make the nonstop 180 m run, starting and ending at rest? ______ s
(a) What is the magnitude of the force that each sphere experiences? (b) The spheres are brought into contact and then separated to a distance of 3.51 cm. Determine the magnitude of the force that e
Find the work that must be done to increase the speed of the particle of mass 1kg from 2m/s to 6m/s over the distance of 10m. A constant friction force f=2N acts over the entire distance.
A sled with a child sliding down (from rest) at 14 degree hill has a mass of m=120kg. The length of the hill is 60 m and coefficient of kinetic friction between the surface ad the sled is .14. Once
Calculate the final equilibrium temperature assuming no heat loss after mixing occurs. Equilibrium temperature after initial heat loss: (answer in Celsius)
Two point charges of equal magnitude are 7.8 cm apart. At the midpoint of the line connecting them, their combined electric field has a magnitude of 47 N/C . Find the magnitude of the charges q= __
A charge (uniform linear density = 9.4 nC/m) lies on a string that is stretched along an x axis from x = 0 to x = 3.0 m. Determine the magnitude of the electric field at x = 5.0 m on the x axis.
A disk of radius 1.2 cm has a surface charge density of 7.0 µC/m2 on its upper face. What is the magnitude of the electric field produced by the disk at a point on its central axis at distanc
The rock reaches a maximum height of 1.40×103m above the surface of the planet before it falls back down. What was the initial speed of the rock as it left the astronaut's hand? (Glob has no a
A 3.74 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=12.30 N at an angle theta=29.5 above the horizontal.(The force is being applied halfway up the b