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Two trains are accidentally put on the same track and are heading toward one another. Both trains are travelling at 120 km/h and are separated by 0.500 km. The larger train can slow down with a 5.00 m/s2 acceleration. The smaller train can slow down with an acceleration of 8.50 m/s2. Do the trains collide? If they do collide, at what speed is each train travelling at when they do collide? If they do not collide, what is the separation between them when they both stop?
A balloon contains 10 lbs of Helium at a temperature of 70 ?F. If the volume of the balloon is 300 ft3, what is the pressure of the balloon
An archer lines up an arrow on the horizontal exactly dead center on a target. She releases the arrow, and it strikes the target a distance h=7.6cm below the center. how long was the arrow in the air before striking the target
A motorcycle is moving at a constant speed v when it encounters a circular hill of radius r = 420 m. The operator and motorcycle combined have mass m = 153 kg. What speed in m/s does the motorcycle have if the operator feels weightlessness (i.e., ..
Sound propagating through air at 30oC passes through avertical cold front into air that is 4.0oC. If the soundhas a frequency of 2400 Hz, by what percentage does its wavelength change in crossing the boundary?
Explain how these principals connect to electricity, magnetism or light in modern applications in physics. Maxwell's research led to development of radio waves.
Standing on the surface of a small spherical moon whose radius is 6.30 104 m and whose mass is 8.00 1018 kg, What maximum height above the surface of the moon will the rock reach
If the magnetic field of the wire is 2.0×10?4 and the electron moves at 1.0×107 , what is the magnitude of the force exerted on the electron
A straight, non conducting plastic wire 7.50cm long carries a charge density of 130nC/m distributed uniformly along its length. It is lying on a horizontal tabletop. If the wire is now bent into a circle lying flat on the table; discover the magnitud..
A +3.4 micro-coulomb charge is placed at the origin and another negative unknown charge is placed some distance, d, around the +3.4 micro-coulomb charge at the origin. The magnitude of the electric force among these two charges is 3.3 Newton’s.
the current in a 30 meter wide river is 3 m/s towards the north. If you need to move straight across the river, how far downstream do you reach the shore
A glass slab surrounded by air causes a sideways displacement in a beam of light.
A man normally consumes 8.4 MJ of food energy per day. He then begins running a distance of 9four times per week. how much more food energy should he consume daily in order to maintain constant weight
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