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Two long parallel wires 20 cm apart are carrying currents 5 A and 8A in the same direction. Is there any point between the two wires where the magnetic field is zero?
A tire placed on a balancing machine in a service station starts from rest and turns through 4.85 revolutions in 1.41 s before reaching its final angular speed. Calculate its angular acceleration.
A dentist's drill starts from rest. After 3.91 s of constant angular acceleration it turns at a rate of 2.74E+4 revolutions per minute. Find the drill's angular acceleration. Determine the angle thr
A small button placed on a horizontal rotating platform with diameter 0.330m will revolve with the platform when it is brought up to a rotational speed of 35.0m , provided the button is a distance
A 24.0 kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 88.5N and is directed at an angle of 30.0degress above the horizontal. Deter
The coefficient of kinetic friction between the log and the ramp is 0.850, and the log has an acceleration of 0.800 m/s2. Find the tension in the rope.
At a given instant two cars at distances 250m and 350mfrom the point of intersection 'O' of two stright roads crossingeach other at right angles are approching 'O' at uniform speeds of6m/s and 12m/s
A cable is lifting a construction worker and a crate. The weights of the worker and crate are 964 and 1650N respectively. The acceleration of the cable is 0.620m/s^2, upward. a) what is the tension
Car batteries are often rated in ampere-hours. Does this unit designate the amount of current, power, energy, or charge that can be drawn from the battery?
A car starts from rest and travels for 5.0 seconds with a uniform acceleration of +1.5 m/s2. The driver then applies the brakes, causing a uniform acceleration of -2.0 m/s2. If the brakes are applied
Two Identically charged particles separated by a distance of 1.0m repel each other with a force of 1N. What is the magnitude of the charges?
A cart is propelled over an xy plane with acceleration components ax = 6.6 m/s2 and ay = -2.2 m/s2. Its initial velocity has components v0x = 7.4 m/s and v0y = 14.2 m/s. In unit-vector notation, wha
A 70.0 kg person stands on a scale in an elevator. What is the apparent weight in each of the following situations: a) when the elevator is accelerating upward with an acceleration of 1.70m/s^2
(a) If a 2.75 μC charged particle moving in the x-y plane experiences a net force of 4.35 x 10-3 N in the +x direction, what is the speed and direction of the charged particle? Include a diagram.
A dipole of moment 0.50 e · nm is placed in a uniform electric field with a magnitude of 1.3 x 105 N/C. What is the magnitude of the torque on the dipole for each of the following situations?
An elevator car of mass 845 kg falls from rest 3.50 m, hits a buffer spring, and then travels an additional 0.390 m, as it compresses the spring by a maximum of 0.390 m. What is the force constant o
By how much does the ball clear or fall short of clearing the crossbar? (Enter a negative answer if it falls short.)
What would be the acceleration of an Atwood machine having a mass of 230g on one side and a mass of 237g on the other side. Neglect the masses of the masses of the pulley and the string.
In scuba diving circles an 80 refers to a scuba tank that holds 80 cubic feet of air, a standard amount for recreational diving. Given that a scuba tank is a cylinder 2 feet long and half foot in di
What is the magnetic field (magnitude and direction) due to these currents at a point midway between the wires? Please show your work.
Assume that a vehicle traveling on a flat surface at 35 mph is able to stop in 80 feet. If you put that same vehicle on an upward slope of X degrees, what is the maximum speed it can travel (in mph)
A person pulls a toboggan for a distance of 35.0m along the snow with a rope directed 25degree above the snow. the tension on the rope is 94N. a. how much work is done on the tobaggan by the tension
What percent of thermal energy transferred goes into increasing the internal energy of the system?
What is the rate of heat flow through a glass window pane .5 mm thick when the outside surface is -5 degrees celsius and the inside surface is 10 degrees celsius? The dimensions of the window are .7
The surface area of a person is 1.9 m^2 and their core and skin temperatures are 37 degrees celsius and 31 degrees celsius, what are the rates of heat transfer through the skin for almost no blood f