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A) A -19 mC charge experiences a force of 60 N directed south. What is the electric field magnitude and direction at the location of the charge?
B) If this charge is removed and not replaced, what is the electric field magnitude and direction at the location is used to occupy?
An ice cube of mass ma and specific heat Ci is initially at temperature T1, where T1 is less than 273K. If L is the latent heat of fusion of water, and the specific heat of water is Cw, how much energy is needed to convert the ice cube to water at ..
A 52-kg pole vaulter running at 13 m/s vaults over the bar. Her speed when she is above the bar is 1.0 m/s, determine her altitude as she crosses the bar
A 3m-long rigid beam with a mass 140 kg is supported at each end. An 75 student stands 2m from support 1.
Determine the location at which the tuning is formed and the vibrating frequency of a string to form a standing wave pattern.
The second hand of a clock has a length of 0.30 m. Evaluate what distance does the tip of the second hand sweep through in 3 minutes and 45 seconds?
The small currents in axons corresponding to nerve impulses produce measurable magnetic fields. What is the strength of the field at a distance of 1.2mm
An alpha particle and beta^ {-} particle, each with kinetic energy 35 {rm keV}, are sent through a 1.10 {rm T} magnetic field. The particles move perpendicular to the field. Find the curvature radius for alpha particle's trajectory. Hint: The kine..
A 54 N crate is suspended from the left end of a plank. The plank weighs 21N, but it is not uniform, so its center of gravity does not lie halfway between the two ends. The system is balanced by a support that is 0.3m from the left end of the plan..
What is the focal length of the contact lenses that will enable him to see distant objects clearly
A resistor, capacitor and inductor are connected in series to an ac source with a frequency of 30 Hz and an rms potential of 40 V. What is the resonance frequency for this circuit
An 18-year-old runner can complete a 10.0 km course with an average speed of 4.38 m/s. A 50-year-old runner can cover the same distance with an average speed of 3.88 m/s. How much later (in seconds) should the younger runner start in order to fini..
An object rotates about a fixed axis, and the angular position of a reference line on the object is given by ? = 0.60e8t, what are the magnitudes of the point's
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