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why if the potential is constant on a surface,then any electric field present can only beperpendicular to that surface?... can you please explain howthis is true in more detail.
an 80 kg crate is resting on a rough horizontal surface. the coefficient of static friction is 0.5 between the surface and the crate. how much force is required to start the crate moving
A river has a steady speed of 0.250m/s. A student swims upstream a distance of 1.00 km and swims back to the starting point. by how much would the trip be longer or shorter
reviews the concepts that are involved in this problem. A child is twirling a 0.0211-kg ball on a string in a horizontal circle whose radius is 0.0866 m. Determine the centripetal force acting on the ball
An ac power generator produces 30 A rms at 3791 V. The voltage is stepped up to 108000V by an ideal transformer, What percentage of the power delivered by the generator
What is decrease in kinetic energy throughout the collision.
A certain type of elementary particle travels at a speed of 2.75×108m/s. What is the particles lifetime at rest in seconds
a ray of light traveling through the air has an angle of incidence of 30 degrees on a block of glass, find speed of light on the block of glass
If an airplane accelerates at 10 m/s2 for 12.3 seconds. How far has the plane traveled in that amount of time
An open train car, with a mass of 2030 kg, coasts along a horizontal track at the speed 2.45 m/s. What is the car\'s speed after the loading is completed
What potential difference would be required across the same twocapacitors connected in series in order for the combination to store the same amount of energy?
A ray of light strikes a flat block of glass (n = 1.53) of thickness 1.80 cm at an angle of 36.0° with the normal. find the angles of incidence and refraction at each surface
a photon of wavelength 0.55000 nm strikes a free electron that is initially at rest. the photon is scattered straight
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