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Two trains, each having a speed of 27 km/h, are headed at each other on the same straight track. A bird that can fly 54 km/h flies off the front of one train when they are 54 km apart and heads directly for the other train. On reaching the other train it flies directly back to the first train, and so forth. (We have no idea why a bird would behave in this way.) What is the total distance (in km) the bird travels?
When the plunger is pushed, contents of the syringe are forced throughout a hollow needle (also of circular cross-If a 4.0 N force is applied to plunger and diameters of the plunger and the needle are 1.20 cm and 2.50 mm, correspondingly, what force ..
A 55 year old woman who is complaining of intermittent flushing, itching and heartburn for several months. Mega dosing of that of the following vitamins may result in these symptoms.
While riding her bicycle on a 140 meter track, a rider took 18 seconds on her first lap and 17 seconds on her second
spy planes fly at extremely high altitudes (25.5 km) to avoid interception. what must be the minimum aperture of the camera lens to afford this resolution
A man tries to determine the distance to an island offshore by using his knowledge of physics and wave motion. how far away is the island
A sinusoidal wave traveling in the positive x-direction has a wavelength of 11 cm, a frequency of 13 Hz, and an amplitude of 19 cm. The part of the wave that is at the origin at t = 0 has a vertical displacement of 6 cm.
Three protons are at the vertices of an equilateral triangle 0.800nm on each side. What is the potential energy of this set of charges
A ball of mass 0.60 kg is fired with velocity 200 m/s into the barrel of a spring gun of mass 2.0 kg initially at rest on a frictionless surface. What fraction of the ball's initial kinetic energy is stored in the spring
If a index card is 3inx5in and another is 5in x7in find the conversion factor by dividing the value in cm/in. Calculate the area of both index cards
In one day, a 75 kg mountain climber ascends from the 1500-m level on a verical cliff to the top at 2400m. What is the change in her gravitational potential energy
For the house in Question 3, calculate the infiltration heat losses in Btu/h when ?T = 40°F. What percentage of the heat loss is because of infiltration
A particle with a charge of 4.10 is in a uniform electric field directed to the left. What work was done by the electric force
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