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In a particular region of the earth's atmosphere, the electric field above the earth's surface has been gauged to be 150 N/C downward at an altitude of 240 m and 165 N/C downward at an altitude of 404 m. Compute the volume charge density of the atmosphere assuming it to be uniform among 240 and 404 m. Neglect the curvature of the earth.
An ideal monatomic gas is contained in a vessel of constant volume 0.270 m3. The initial temperature and pressure of the gas are 300 K and 5.00 atm, respectively. Find the change in temperature of the gas
A spider hangs from a strand of silk whose radius is5.8x10-6 m. The density of the silk is 1100kg/m3. When the spider moves, waves travel along the strand of silk at a speed of 310 m/s. Determine the mass of the spider.
You are flying to Chicago for a weekend away from the books. In your last physics class, you learned that the airflow over the wings of the plane creates a lift force, estimate the banking angle of the plane relative to the horizontal
A certain airplane has a speed of 250.0 km/h and is diving at an angle of 30.0° below the horizontal when the pilot releases a radar decoy. The horizontal distance between the release point and the point where the decoy strikes the ground is 700 m..
A stone is thrown at a bell with the speed of 20m/s. The stone strikes the bell and the sound is heard 2.60 s after the stone was released. Speed of sound is 342m/s, how far is the boy from bell.
A model of a red blood cell portrays the cell as a spherical capacitor, If an average red blood cell has a mass of 1e-12 kg, estimate the volume of the cell and thus find its surface area. The density of blood is 1100 kg/m3
You need a transformer that will draw 16 W of power from a 220 V (rms) power line, stepping the voltage down to 12 V (rms) What will be the current in the secondary coil? Express your answer to two significant figures and include the appropriate un..
a ball of mass 4kg starting from rest rolls down from a height of 5m to the ground level. hint pe mgh ke 12 mv2 use
A motorcycle, which has an initial linear speed of 6.4 m/s, decelerates to a speed of 1.5 m/s in 5.7 s. estimate the angular displacement (in rad) of each wheel
The damage caused by electric shock depends on the current flowing through the body; 1 mA can be felt and 5 mA is painful. What is the minimum voltage placed across the arms that would produce a current that could be felt by a person with dry skin
A 3.5-kg block of iron (c=0.11 kcal/kgoC) that has been brought to a temperature of 1,063oC is placed on top of a 2.5-kg block of ice (c=0.5 kcal/kgoC) that has been cooled to -50oC
When light with a wavelength of 206 nm is incident on a certain metal surface, electrons are ejected with a maximum kinetic energy of 2.57 x 10-19 J. find the wavelength (in nm) of light that should be used to double the maximum kinetic energy of ..
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