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Calculate the ratio of the drag force on a jet flying at 1140 km/h at an altitude of 10 km to the drag force on a prop-driven transport flying at half that speed and altitude. The density of air is 0.38 kg/m3 at 10 km and 0.67 kg/m3 at 5 km. Assume that the airplanes have the same effective cross-sectional area and drag coefficient C.
The temperature of 15 kg of water increases at 0.003 degrees Celsius per second. At what rate is the internal energy of the water increasing
An aircraft flying at 100 mph TAS at 5000 ft pressure altitude on a standard day experiences a clogged static port. What is the average velocity around the cockpit
A painter is using a ladder to paint the outside of a house. The ladder, which is 8.44 m long and has a mass of 23.7 kg, Calculate the net torque acting on the ladder
Two particles are fixed to an x axis: particle 1 of charge q1 = 1.86 x 10-8 C at x = 27cm and particle 2 of charge q2 = -3.63q1 at x = 77.7cm. At what coordinate on the x axis is the electric field produced by particles equal to zero.
approximately what is the mass of an object whose weight equals the force from part "b"? can you lift such a mass.
Three moles of an ideal monatomic gas are at a temperature of 345 K. What is the change in the internal energy of the gas
A car is driving directly north on the freeway at a speed of 112 km/h, What is the velocity of the truck relative to the car
The downward acceleration of a 74-kg stuntwoman near the end of a fall from a very high building is 5.5m/s2
A 2.50g ice flake is free from the edge of a hemispherical bowl whose radius r is 31 cm. The flake-bowl contact is frictionless. What is the speed of the flake when it reaches the bottom of the bowl?
At t = 0 a grinding wheel has an angular velocity of 25.0 rad/s. It has a constant angular acceleration of 21.0 rad/s2 until a circuit breaker trips at t = 1.81 s. What was its acceleration as it slowed down
You are running toward an approaching marching band. You are moving at 9.3 m/s and the band is moving at 2.7 m/s
Heat flows into an ideal gas at a constant volume. The pressure increases from 1.5 atm to 5.5 atm. What is the total heat flow of the process
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