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A standing wave is set up by reflecting radio waves from a large, flat metal dish. It is found that maxima in the electic field of the standing waves occur at distances 20, 60 and 100 cm from this dish.
a) What is the frequency of the radio waves?
b) Where are the corresponding maxima in the magnetic field?
An airplane needs to reach a velocity of 407 km/h to take off. On a 2000m runway, what is the least acceleration necessary for the plane to take flight.
The basic concepts in optics.
A rectangular container measuring 26 cm 47 cm 59 cm is filled with water. What is the mass of this volume of water in kilograms and grams.
How high a tree would a 79.0 kg person have to climb to increase his gravitational potential energy relative to the ground by that amount.
Evangelista Torricelli was the first to put forward the idea that we live at the bottom of an ocean of air. (i) Given the value of the atmospheric pressure at the surface of the Earth.
A 75-m long train begins unknown uniform acceleration from rest.The front of the train has a speed of 23 m/s when it passes arailway worker who is standing 180m from where the front of the train started. What will the speed of the last car be as i..
what is the ratio of the amplitude of damped oscillations.
What mass (in grams) of steam at 100°C should be mixed with 212 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 14.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg..
A straight wire in a magnetic field experiences a force of 0.030 N when the current in the wire is 2.7 A. What is the new current
What is used up electric potential energy of charge carriers
A uniform circular ring of charge Q= 7.30 microCoulombs and radius R= 1.10 cm is located in the x-y plane, centered on the origin. What is the magnitude of electric field E at point P, located at z= 2.80 cm.
How much time take for the package to reach the ground.
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