Answer:
The deceleration is 
Explanation:
From the question we are told that
The distance of the car from the crossing is 
The speed is 
The reaction time of the engineer is 
Generally the distance covered during the reaction time is
=> 
=> 
Generally distance of the car from the crossing after the engineer reacts is
=> 
=> 
Generally from kinematic equation
Here v is the final velocity of the car which is 0 m/s
So
=>
Answer:
distance between seats = 2*11.10 = 22.20 m
Explanation:
seats row is parallel to a stage with a distance d = 90 m
doorway width = 0.070 m
speaker frequency = 4.00 * 10^4 Hz
Speed of sound = 343 m/s
tone will be heard at
we know that 
so
[tex]x = d*tan\theta = 90*0.1234 = 11.10 m
distance between seats = 2*11.10 = 22.20 m
Answer:
I don't know
Explanation:
cause we don't know which lab you are talking about
Answer:
Work occurs when a force acts on an object and causes a displacement of that object.
Explanation:
a . Force applying over a distance or in other words force causing the movement (displacement) of an object is known as Work.
b. An activity with mental or physical effort is done in order to achieve a result is called work.
c. A constant force integrates the product of the force and distance.
Ex : 1) when the body moves in the direction of force
2) shooting a bullet
3) Pushing a car horizontally from rest
4)walking up stairs
5) sawing a log.
