<h2>
The impact is occurred at a distance 348.55 m far from person.</h2>
Explanation:
Let s be the distance to the impact position and t be the time when he hears the sound though concrete after impact.
Time when he hears impact through air = t + 0.90
The distance traveled by sound wave in both concrete and air is s.
Speed of sound in air = 343 m/s
Speed of sound in concrete = 3000 m/s
Distance traveled in air = Distance traveled in concrete
343 x Time when he hears impact through air = 3000 x Time when he hears impact through concrete
343 x (t + 0.90) = 3000 x t
3000t - 343 t = 343 x 0.90
2657t = 308.7
t = 0.116 s
Distance traveled in concrete = 3000 x t = 3000 x 0.116 = 348.55m
So the impact is occurred at a distance 348.55 m far from person.
Answer:
The storage method is originally designed to last years. The exact amount of time comes down to what type of waste it is.
Answer: Green Light
Explanation:
The color green has a higher frequency than the color red and the higher the frequency the more energy. If you looks at a rainbow you'll see red on one end and violet on the other. Red has the least energy Violet has the most.
Answer:
See explanation.
Explanation:
If both stars explode in simultaneously in the <em>your </em>frame of reference then obviously you will see the two flashes simultaneously, and therefore, the time difference between the events would be zero.
If however, the stars exploded simultaneously in their frame of reference, then you would not observe the flashes simultaneously. Then the time difference between the events will not be zero, rather, you will observe star B exploding first and star A after.
Answer:
The crate was being lifted by a height of 1.48 meters.
Explanation:
In an attempt o move a crate;
Force applied = 2470 N
Work done by the force = 3650 J
We know that the work done is defined as the force used to move an object to a distance.
Given the Force used and the work done by that Force, we need to find out the distance the crate was lifted to.
Work done is defined as:
Work = Force*distance covered in the direction of the force
3650 = 2470*distance
distance = 3650/2470
distance = 1.48 meters
