Question

Two trains depart at the same time, heading toward each other on parallel tracks. The stations are 5 miles apart. One train accelerates at a rate of 8 mi/hr/s while the other train accelerates at a rate of 9 mi/hr/s. How long does it take the trains to pass each other?

How fast is each train moving as they pass each other?

Answer #1

Two trains are approaching each other on adjacent tracks each
running with a constant velocity of 10 m/s. When they are at a
distance of 90 m, a bird flying right with one of the train engines
decides to go ahead towards the other train with double the speed
of the train. As soon as it reaches the other train, it turns
around without landing and flies back to the train it started from.
How many times can the bird...

A person is standing at a train station, and two identical
trains are passing each other 100 m down the tracks. Train A is
moving away from him at 20 m/s, and train B is moving toward him at
20 m/s. As the trains pass each other, they emit identical pulses
of sound from their horns. At the instant that the pulses are
sounded, the trains' horns are both precisely 100 m away from him.
What will the person hear?...

Two buses are driving along parallel freeways that are 20 mi
apart, one heading east and the other heading west. Assuming that
each bus drives a constant 50 mph, find the rate (in mph) at which
the distance between the buses is changing when they are 29 mi
apart, heading toward each other.

Two wires are parallel, and one is directly above the other.
Each has a length of 38.6 m and a mass per unit length of 0.0267
kg/m. However, the tension in wire A is 47.3 × 102 N, while the
tension in wire B is 1.50 × 102 N. Transverse wave pulses are
generated simultaneously, one at the left end of wire A and one at
the right end of wire B. The pulses travel toward each other. How
much...

Two cars moving with same speed 10 m/s but in the opposite
directions pass each other at t=0. At that instant they both start
to slow down with the same magnitude of acceleration
2 m / s2
1-) What ist the maximum distance between the
cars ? How long does it take them to be at the same position again
?
2-) Plot the position vs. time graph of the
cars qualitatively.

5) Two high-speed ferries leave at the same time from a city to
go to the same island. The first ferry, the Cat, travels at
36 miles per hour. The second ferry, the Bird, travels at 23
miles per hour. In how many hours will the two ferries be 26 miles
apart?
The ferries will be 26 miles apart after ...hour(s).
6) Jane took 30 min to drive her boat upstream to water-ski at
her favorite spot. Coming back later...

Two particles, both carrying charge 6 C are traveling parallel
to each other with velocities of v⃗ =13000i^v→=13000i^ in m/s. They
are positioned at the points (0,4,0)(0,4,0) and (0,−4,0)(0,−4,0).
What is the magnitude and direction of the magnetic field at
(0,4,0)(0,4,0) due to the particle located at (0,−4,0)(0,−4,0)?
[Enter the magnitude in answer box 1 and the direction as one of
either "in", "out", "up", "down", "left", or "right" in answer box
2. Assume that the xx-axis corresponds to left/right,...

At a certain moment in time, two identical, positively charged
particles are flying horizontally toward each other. Let the
xx-axis be the axis along which the particles are moving, and let
the origin lie directly between both particles. Let the yy-axis be
oriented pointing vertically up and the zz-axis point directly out
from the origin.
1) Which combination of options below are the best combination of
corrections that you might make to your friend's diagram? [Enter
your answer as a...

Two identical objects of the same mass come into thermal contact
with each other. If object A is at 20o
C and the object B is at 90o C ,
then the equilibrium temperature will be
a.
20o C
b.
110o C
c.
90o C
d.
55o C
If a flat metal plate with a circular hole cut through it is
heated,
a.
the hole gets larger.
b.
the hole may get larger or smaller, depending on how much the
plate...

1. A cord of mass 0.65 kg is stretched between two supports 8.0
m apart. If the tension in the cord is 140 N, how long will it take
a pulse to travel from one support to the other?
2. A 50.0 Kg ball hangs from a steel wire 1.00 mm in diameter
and 6.00 m long. What would be the speed of a wave in the steel
wire?
3. The intensity of an earthquake wave passing through the earth...

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