Answer:
7500 m
Explanation:
The radar emits an electromagnetic wave that travels towards the object and then it is reflected back to the radar.
We can call L the distance between the radar and the object; this means that the electromagnetic wave travels twice this distance, so
d = 2L
In a time of
Electromagnetic waves travel in a vacuum at the speed of light, which is equal to
Since the electromagnetic wave travels with constant speed, we can use the equation for uniform motion ,so:
(1)
where
, where L is the distance between the radar and the object
Re-arranging eq(1) and substituting, we find L:
Explanation:
Below is an attachment containing the solution.
The answer is 0.42 blocks per minute, Good Luck!
In the first shell there can be a maximum of 2 electrons, then 8o in the second one and 8 in the third one.
Answer:
The original dimensions of the building is 95 ft × 38 ft.
Explanation:
Let the original length be 'l' and original width be 'w'.
Given:
Original length (l) = 
Original width = 'w'.
So, 
Now, as per question:
Length and width is increased by 7 ft.
So, new length (l') = 
New width (w') = 
New perimeter (P) = 266 ft
Perimeter is given as:
Therefore, original width = 38 ft.
Original length is, 
Hence, the original dimensions of the building is 95 ft × 38 ft.
