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Two point charges are placed along a horizontal axis with the following values and positions: +3.0μC at x=0 cm and-7.0μC at x= 20 cm. At what point along the axis is the electric field zero?
A massless spring with spring constant 20 N/m hangsvertically. A body of mass 0.3 kg is attached to its freeend and then released. Find the frequency of the resulting motion
A ramp is 25 meters long and is inclined at 30 degrees with the horizontal. A block of mass 25 is pulled up at a constant acceleration of 1 m/s2. The coefficient of kinetic friction is 0.15. If the box starts at rest from the bottom, what would be..
A car is travelling at a constant speed of 31.1 m/s on a highway. At the instant this car passes an entrance ramp, a second car enters the highway from the ramp. The second car starts from rest and has a constant acceleration. What acceleration mu..
Two mirrors are at an angle of 45 degrees to each other. A light beam strikes the bottom mirror (which is horizontal) at an angle of 60 degrees: At what angle theta is it reflected from the second mirror
q. a 30 gram mass is hanging from a spring whose unstretched length is 20 cm and whose spring constant is 2.5 nm. in
air is contained in a piston/cylinder at 350K, 300kPa and occupies 0.1m^3. determine the change of availability of the system
A certain cylindrical drum is 3 meters in height. It filled with with water. Atmospheric pressure is 10^5 Pa, and the density of water is 1000 gl/m^3. What is the water pressure at the bottom of the barrel
Two long, straight, parallel wires of length 3.6 m carry parallel currents of 3.2 A and 0.9 A. What is the magnitude of the force between the two wires
Determine the moment of inertia for three children weighing 61.0 lb, 47.0 lb and 81 lb sitting at different points on the edge of a rotating merry-go-round, which has a radius of 12 ft.
When a resistor is connected across the terminals of an ac generator (104 V) that has a fixed frequency, there is a current of 0.545 A in the resistor. determine the impedance of the series combination
An Electromagnetic Car Alarm, Your latest invention is a car alarm that produces sound at a particularly annoying frequency of 3500Hz. What value of inductance should you choose for your car alarm circuit
A neutron star and a black hole are 2.900e+12 m from each other at a certain point in their orbit. What is the magnitude of the gravitational attraction between the two
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