A. Translucent because it’s shows a little light on the inside and looks dark on the outside
I believe it’s false, I think I had this before
Let us follow the motion of the hammer first. Because the elevator is in motion, when he drops the hammer, because of inertia, there is a slight moment when the hammer also rises with the elevator. Eventually it will reach its highest peak and drop down to the floor. So, the total time for the hammer to reach the floor would include: (1) the time for it to rise with the elevator to its highest peak and (2) the time for the free fall from the highest peak to the floor.
1.) Time for it to rise with the elevator to its highest peak:
Hmax = v²/2g = (6 m/s)²/2(9.81 m/s²) = 1.835 m
Time to reach 1.835 m = 1.835 m * 1 s/6 m = 0.306 s
Time for the free fall from the highest peak to the floor:
t = √2y/g, where y is the total height
y = 1.835 m + 42 m = 43.835 m
So,
t = √2(43.835 m )/(9.81 m/s²) = 2.989 s
Therefore, the total time is 0.306 s + 2.989 s = 3.3 seconds
2.) Velocity of impact of a free-falling body is:
v = √2gy
v = √2(9.81 m/s²)(43.835 m)
v = 29.33 m/s
The intensity of sound in the unit of decibel is, 1.90*10^-5W/m^2.
To find the answer, we have to know about the intensity of sound.
<h3>How to find the intensity of sound in decibel?</h3>
- The rate of transfer of energy per unit area perpendicular to the direction of propagation of sound is called the intensity of sound.
- We have the expression for intensity of sound in the unit of decibel as,
- It is given that, the intensity of whisper with intensity 10^−10 watts per square inch, and the threshold value of intensity is,
- Thus, in dB the intensity is,
Thus, we can conclude that, the intensity of sound in the unit of decibel is, 1.90*10^-5W/m^2.
Learn more about the intensity of sound here:
brainly.com/question/15866608
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Answer:
The time will be the same.
Explanation:
Hello there
when the balls are released from the top of the store the acceleration of attraction to the floor is gravity and it has a value of 9.8 meters / square second regardless of its weight, all this without counting on air resistance, experiments have been carried out in vacuum rooms where a feather has been dropped and a hammer at the same time, and it is astonishing how they take the same to reach the ground, assuming that there is air as it is in reality, what really can affect the time is the aerodynamics of the object for example if dropping a sheet of paper and a marble.
Have a great day
