Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
where r is measured in meters. What is the total charge on the ball? Hint: To solve this , you will first need to mentallydivide the ball into a series of thin shells.
(a) what is the electric force that acts on the particle? (b) what is the work done on the particle by the electric field? (c) what is the potential difference Va-Vb between points a and b?
A 950 kg boat is traveling at 110 km/h when its engine is shut off. The magnitude of the frictional force fk between boat and water is proportional to the speed v of the boat.
A bird lands on a bare copper wire carrying a current of 15 A. The wire is 8 gauge, which means that its cross-sectional area is 0.13 cm2. (a) Find the difference in potential between the bird's fee
A battery has an emf and an internal resistance r. When the battery is connected to a 25Ω resistor, the current through the battery is 0.55 A. When the battery is connected to a 48 Ω resis
When two resistors, R1 and R2, are connected in series across a 6.0-V battery the potential difference across R1 is 4.4 V. When R1 and R2 are connected in parallel to the same battery the current t
A 33.1-kg child runs with a speed of 2.80 m/s tangential to the rim of a stationary merry-go-round. The merry-go-round has a moment of inertia of 510 kg · m2 and a radius of 2.40 m. When the
A solenoid is wound with a single layer of insulated copper wire of diameter 2.500 mm and has a diameter of 3.000 cm and is 1.100 m long. Assume that adjacent wires touch and that insulation thickne
What is the ratio of the acceleration due to gravity that you measure compared to what you would have measured had the density been 5500 kg/m3 everywhere? (Hint: Think of this as a superposition pro
When a current of I = 42 A exists in the wire, the wire swings upward and, at equilibrium, makes an angle ? with respect to the vertical. Find (a) the angle ? and (b) the tension in each of the two
The mayor of your home town is worried that magnetic fields might cause cancer and proposes that the electric power company not have any magnetic fields that extend beyond the right of way of their
It travels with this constant speed for the next 5.00 s. The elevator then undergoes a uniform acceleration in the negative y direction for 1.30 s and comes to rest. What does the spring scale regis
a small bulb is rated at 7.5W when operated at 125V. the tungsten filament has a temp coeff of resistivity a=4.5x10^-3/C. when the filament is hot and glowing its temp is seven times the room temp 2
What is the angular momentum of the Earth spinning on its own axis (magnitude and direction)?
What is the ratio of the final kinetic energy of the system to the initial kinetic energy? What is the ratio of the mass of the more massive object to the mass of the less massive object?
What are the currents in each resistor? A (3.0 resistor) A (6.0 resistor) A (9 resistor) (c) Repeat for the case in which all three resistors are connected in parallel across the battery. (equivalen
A cell membrane has a resistance and a capacitance and thus a characteristic time constant. What is the time constant of a 8.5nm -thick membrane surrounding a 4.0×10^-2mm -diameter spherical c
(b) If the speed of the bat is increased, is the frequency heard by the moth higher or lower? (c) Calculate the frequency heard by the moth when the speed of the bat is 4.25 m/s.
A 2.0 kg ball and a 3.5kg ball are connected by a 2.5m long rigid, massless rod. The rod and balls are rotating clockwise about its center of gravity at 16 rpm. What torque will bring the balls to a
t travels to the right with speed v. It then enters a region containing a uniform magnetic field of magnitude 0.3 T directed into the page. (a) Draw a diagram of the system including the path of the
A charge of 8.00 mC is placed at each corner of a square 0.95 m on a side. Determine the magnitude and direction of the force on each charge.
An electromagnetic wave has an electric field with a peak value of 250 N/C. What is the is the average energy delivered to a surface with area .75 m^(2) by this wave in one hour?
Two parallel plates separated by a distance d = 0.4 meter have equal and opposite charge uniformly distributed on the plates, as shown in cross section below. The strength E of the electric field be
A 16-kg sled is being pulled along the horizontal snow-covered ground by a horizontal force of 33 N. Starting from rest, the sled attains a speed of 2.7 m/s in 8.6 m. Find the coefficient of kinetic
The coefficient of static friction for aluminum on steel is 0.61, and for copper on steel is 0.53. An aluminum block of mass m1= 2.0 kg and a copper block of mass m2= 6 are connected by a light stri