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On the moon the acceleration due to gravity is 1/6 of Earth's. A ball is thrown straight up on the moon and it takes t = 23 s to return to the surface. Write an expression for the maximum height ach
A child throws a penny off of the Eiffel tower (h = 324m) with a downward velocity of magnitude v0 = 13 m/s. Find the speed at which the penny strikes the ground, vf (in m/s), using the initial vel
A proton has an initial speed of 3.5 105 m/s. (a) What potential difference is required to bring the proton to rest? (b) What potential difference is required to reduce the initial speed of the prot
A system consisting entirely of electrons and protons has a net charge of 1.95 10-15 C and a net mass of 4.43 10-23 kg. (a) How many electrons are in this system? electrons (b) How many protons are
(a) Find the direction and magnitude of the electric field. direction magnitude N/C (b) If the electric charge on the object is tripled while its mass remains the same, find the direction and magnit
Suppose the charge q2 can be moved left or right along the line connecting the charges q1 and q3. Given that q = +17 µC, find the distance from q1 where q2 experiences a net electrostatic forc
Ce-144 is a fission product formed in fission. The cumulative fission yield is 5.5%. Since all the precursors of Ce-144 have very short half-lives, we can readily assume that all the fission directl
What is the launch speed of a projectile that rises vertically above the Earth to an altitude equal to one Earth's radius before coming to rest momentarily? (Astronomical data needed for this probl
Two charges q1 and q2 have a total charge of 16 C. When they are separated by 1.5 m, the force exerted by one charge on the other has a magnitude of 8 mN. Find q1 and q2 if (a) both are positive so
A + 5.0 micro C charge experiences a 0.45- N force in the positive direction. If this charge is replaced with a -2.7 micro C charge, find the magnitude of the force in this case. The absolute value
The following steps are taken: A and B are connected by a thin wire and then disconnected; B is grounded by the wire, and the wire is then removed; B and C are connected by the wire and then disconn
A plane leaves the airport in Galisto and flies 155 at 68.0east of north and then changes direction to fly 270 at 48.0south of east, after which it makes an immediate emergency landing in a pasture
(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