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1. Imagine you are sitting in the airplane taking off from JFK. You are watching a TV monitor which shows outside temperature and plane's altitude. You notice that the airplane flies into the base of a fair-weather cumulus cloud when the altitude is 1000 m and the outside temperature is 15 oC. Estimate the relative humidity outside JFK airport at the time of the takeoff. (Hint: assume that eddies that form the cumulus clouds originate near the surface and ascend dry-adiabatically).
2. Estimate the air pressure at the cloud base from the problem 1 assuming isothermal atmosphere with the average temperature between the cloud base and the surface. (Hint: use the equation of state and integrate vertically the hydrostatic equation.)
The scale of a spring balance reading from 0 to 235rm {N} has a length of 15 rm{cm}. A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.7rm {Hz}. What is the mass of fish? In Kg.
An airplane with a speed of 76.6 m/s is climbing upward at an angle of 49.5 ° with respect to the horizontal, Relative to the ground, determine the angle of the velocity vector of the package just before impact
An airplane goes North with an average speed of 100m/s, What is the plane's velocity relative to the ground
A 5.00*10^-4 C charged mass (1.00g) is thrown upwards at a speed of 20.0 m/s and it is observed that it has gone up a distance of 15m it is moving at only 10.0 m/s, what is the electric potential at 15 m up
A block of mass 2.0 kg is pushed against a vertical wall by a horizontal push (P) of 50.0 N. Find the force AND the direction of the friction
Find out line linking the two point charges
A girl is sledding down a slope that is inclined at 30º with respect to the horizontal, The combined mass of the girl and the sled is 76.5 kg, How much time is required for the sled to travel down a 149-m slope, starting from rest
What is the speed of the projectile
Illustrate energy bar graphs to solve the problem . What is amplitude of the oscillations.
A 1.15-k? resistor and a 590-mH inductor are connected in series to a 1250-Hz generator with an rms voltage of 13.1V, What is the rms current in the circuit
A string 0.5 m long with mass density 0.0003 kg/m and is vibrating 200 cycles per second. What hanging mass would produce this tension
Lightning As a crude model for lightning, consider the ground to be one plate of a parallel-plate capacitor and a cloud at an altitude of 680m to be the other plate. Assume the surface area of the cloud to be the same as the area of a square that ..
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