This problem is a comparison of how fast sound travels through different mediums. <span>The speed of sound in iron is 5950 m/s while in air, it is 331 m/s. Given that the train is 100km away, we can use the given values to solve for the missing values:
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Listening through air:
100000/331 = 302 seconds
Listening through the rails:
100000/5950 = 16.81 seconds
Answer:
It's used to indicate pressure
1 Euro equals<span>1.17 </span>US Dollar
Newton's second law of motion involves the effect of force acting on a mass.
It has to be understood that this actually means the combination of any and
all individual forces acting on it, with their individual strengths and directions
all added together.
When all the individual forces acting on an object add up to zero, then the
whole group of forces is said to be 'balanced'.
When all the individual forces acting on an object don't add up to zero, then
the whole group of forces is said to be 'unbalanced'.
Notice that there's no such thing as 'a balanced force' or 'an unbalanced force'.
It's a <u>group</u> of two or more forces that's balanced or unbalanced.
Answer:
a = 1,000 m/s^2
Explanation:
The take off speed (final velocity) is:
v = 1.0 m/s
The total distance taken is:
d = 0.50 mm = 5 x 10^-4 m
To find the acceleration a, we use the formula: (vi is initial velocity = 0)
v^2 = vi^2 + 2 a d
(1.0 m/s)^2 = 2 a (5 x 10^-4 m)