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A 9.0-g piece of Styrofoam carries a net charge of -.65, What is the charge per unit area on the plastic sheet
Two protons are placed at a = 4.69 cm above and below the x axis at x = 0 as shown in the figure. An electron is placed along the x axis a distance b = 10.1 cm from the origin. find the magnitude of
The following charges are located inside a submarine: 4.00, -8.00, 25.0, and -60.0. find the net electric flux through the hull of the submarine
A package is dropped from a helicopter moving upward at 15 m/s. If it takes 24 s before the package strikes the ground, how high above the ground was the package
The position of an object as a function of time is given by x = bt2 - ct, where b = 2.0 m/s2 and c = 6.7 m/s, What is the instantaneous velocity of the object
Assume a load resistor RLoad is placed in parallel with a 12 volt battery and you measure the voltage across this resistor to be 6 volts
A cube is constructed of six copper plates joined at the edges by an insulating material. find the electrical potential in the center of the cube
The solid shaft in is made from brass that has an allowable shear stress = 100 MPa and a shear modulus of elasticity G = 39 GPa. what is the required diameter of the shaft
A walkway suspended across a hotel lobby is supported at numerous points along its edges by a vertical cable above each point and a vertical column underneath. how much does the point move down
A ferries wheel with radius 20 m which rotates counterclockwise, is just starting up. Find the magnitude of the passenger's acceleration at the instant
A body of mass 6 kg is acted upon by a force which causes a displacement in it given by x = t2/4 metre where t is the time in seconds
A projectile ,was launched vertically from the surface, of the Moon rises to an altitude of 330km. What would be the projectile's initial speed
mitch throws a 50 gram lump of clay with a speed of 20 m/s at a 500 gram target, find the coefficient of friction between the target and the surface
you must determine the acceleration of a rocket so that its equipment can be designed to survive. the rocket will have a burne time of t=30 second, what is maximum altitude of the rocket
a crane drops a 1.0 kg steel ball onto a steel plate. the ball's speed just before impact is 2.0 m/s. what is the bounce back speed right after the impact
A proton having an initial velocity of 17.2i hat bold Mm/s enters a uniform magnetic field of magnitude 0.360 T with a direction perpendicular to the proton's velocity. Determine the time interval f
A 1.2 kg toy car traveling at 2.0 m/s to the right collides and sticks to a 2.0 kg toy car traveling at 1.6 m/s to the left. What fraction of the total initial kinetic energy was lost in the collision
A skater has rotational inertia 4.2 kg?m2 with his fists held to his chest and 5.7 kg?m2 with his arms outstretched. how fast will he be spinning
Two compact sources of sound oscillate in phase with a frequency of 110 Hz where the speed of sound is 340 m/s. What is the phase difference in the sound waves from the two sources at that point
A thin wire of length 3.14 meters has a current of 6.00 Amperes running through it. what is the magnetic field (in Tesla) inside the cylinder
x = 2 + 3t - t^2, Where x is in meters and t is in seconds, Determine At the time is the object at rest
You have a pulley 13.8 cm in diameter and with a mass of 2.1 kg. You get to wondering whether the pulley is uniform. What is the moment of inertia if the pulley is uniform
Two point charges Q1 = +5.70 nC and Q2 = %u22122.40 nC are separated by 25.0 cm. What is the potential energy of the pair of charges
A spherical aluminum ball of mass 1.55 kg contains an empty spherical cavity that is concentric with the ball. The ball just barely floats in water. Calculate the outer radius of the ball
Assume that water flowing through a pipe with a circular cross section flows most rapidly at the center of the pipe and least rapidly near the pipe walls. find the speed of the water at the center o