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Q. In a particular region of Earth's atmosphere, the electric field above Earth's surface has been measured to be 154 N/C downward at an altitude of 270 m and 174 N/C downward at an altitude of 420 m. Calculate the volume charge density of the atmosphere, assuming it to be uniform between 270 and 420 m. (Hint: You may neglect the curvature of Earth. Why?)
Q. A point charge 9.00 {rm nC} is at the center of a cube with sides of length 0.180 {rm m}. What is the electric flux through the surface of the cube?
A coffee filter of mass 1.5 grams dropped from a height of 2 m reaches the ground with a speed of 0.7 m/s. How much kinetic energy Kair did the air molecules gain from the falling coffee filter? begin from the Energy Principle, and choose as the s..
Find the power in sideband, total power, carrier power, carrier rms voltage and the peak voltages for carrier and sidebands of AM transmitter.
Estimate the ball's rise in temperature.
What is the minimum coefficient of friction between tires and road.
A toy airplane is tied to the ceiling with a string. When the airplane's motor is started, it moves with a constant speed of 1.03m/s in a horizontal circle. If the angle the string makes with the vertical is 27°, and the tension of the string is 1N.
A block of ice of mass 8 kg, released from rest at the top of a frictionless ramp of a 1.50m long slides downhill, reaching a speed of 2.50 m/s at the bottom.
To get back to the shuttle, the astronaut unstraps a 10-kg tool kit and throws it away with a speed of 8 m/s. In the script, the astronaut, who has a mass of 80 kg without the toolkit, survives, but is this accurate.
Explain the spacing between allowed vibrational energy levels
A 4m length of light nylon cord is wound around a uniform cylindrical spool of radius 0.50 m and mass 1 kg. The spool is mounted on a frictionless axle and is initially at rest. The cord is pulled from spool with a constant acceleration of magnitu..
What is the angular velocity in rad/s . What is the least pressure obtained inside the bottle? What will happen when this pressure is reached.
A 9.40kg projectile is fired vertically upward. Air drag decreases the mechanical energy of the projectile-Earth system by 69.5kJ throughout the projectile's ascent. How much higher would the projectile have gone were air drag negligible.
The 3.3 kg piece of wood slides on the surface. The curved sides are perfectly smooth, but the rough horizontal bottom is 35 m long and has the kinetic friction coefficient of 0.24 with the wood. The piece of wood starts from rest 6.0 m above the rou..
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