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A) What must the charge (sign and magnitude) of a particle of mass 1.42g be for it to remain stationary when placed in a downward-directed electric field of magnitude 610N/C ? Use 9.81m/s^2 for the magnitude of the acceleration due to gravity. B) What is the magnitude of an electric field in which the electric force on a proton is equal in magnitude to its weight?
a closed Gaussian surface in the shape of a cube of edge length 3.35 m. What is the net charge (in Coulombs) contained by the cube
A 50kg pullvolter running at 10 m/s vults over the bar. Her speed when she is above the bar is 1 m/s. estimate her altitude as she crosses the bar
A sound pulse has a power of 893.1 watts. It is radiating outwards from a point and at the time of observation is a radius of 7861.6 m from that point
a standing wave oscillating on a string at frequency f_0. How many antinodes will there be if the frequency is increased to 3f_0
The magnetic flux of a 200 turn coil changes from 1000 Mx to 16,000 Mx in 4 us. what is the absolute value of induced voltage
The springs of a 1800kg car compress 5.4mmwhen its 64kg driver gets into the driver's seat.If the car goes over a bump, what will be the frequency of oscillations
If a transformer steps the voltage down from 8800 V (at the pole) to 120 V (at the building) and it is to deliver 1000 kW to the building at 80% efficiency, what is the ratio of primary turns to secondary turns
A 0.135kg ball is thrown straight up from 2.07m above the ground. Its initial vertical speed is 5.20m/s. Calculate the total work done by the force of gravity
A bumper car with mass m1 = 115kg is moving to the right with a velocity of v1 = 4 m/s. A second bumper car with mass m2 = 95 kg is moving to the left with a velocity of v2 = -3.7 m/s. The two cars have an elastic collision. Suppose the surface is fr..
An astronaut constructs a pendulum with a length of 1 meter on a new planet. If the period is 3 second, what is the acceleration due to gravity
During takeoff, an airplane climbs with a speed of 160 m/s at an angle of 24 degrees above the horizontal. How fast is the shadow of the plane moving along the ground
Light of wavelength 540.00 nm is incident normally on a diffraction grating, How many slits/mm are marked on the grating
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