Answer:
Time to move out of the way = 1.74 s
Explanation:
Time to move out of the way is one fourth of period = 6.95/4 = 1.74 seconds.
Time to move out of the way = 1.74 s
Answer:
B. 500 years
Explanation:
The light coming from the star and reaching us on the Earth travels with uniform motion (with constant velocity), so we can use the equation of uniform motion which relates distance covered, speed and time taken:
where
v is the speed
d is the distance covered
t is the time taken
In this problem:
is the speed at which light travels
is the distance that light has to cover from the star to the Earth
Therefore, by rearranging the equation, we can find the time:
And by converting into years, this time is
So, approximately 500 years: this means that the image we see of the star is 500 years old.
The correct answer is
b. False
It's actually the opposite: only a very small part of the electromagnetic spectrum is visible to human eye.
The electromagnetic spectrum consists of a huge range of wavelengths, spanning from gamma rays (with very short wavelength, at the order of 1 pm) to radio waves (with very long wavelength, at the order of kilometers). The only portion of this spectrum visible to the human eye is the "visible light", which has wavelengths between 400 and 700 nanometers approximately.
The volume is 13.5=xyz
and the surface area is:
s=xy+2xz+2yz
from the equation we get:
z=13.5/xy; k=13.5
z=k/xy
I will use k instead of a number just for the convenience we plug this into the second equation and we get:
s=xy+2k1/k+2k1/y
To find the minimum of this function we have to find the zeros of its first derivative.
sx will denote the first derivative with respect to x and sy will denote the first derivative with respect to sy.
Now let both derivatives go to zero and solve the system (this will give us the so called critical points)
Now, we plug the first equation into the other and we get:
x=3
Now we can calculate y:
and finally we can calculate z:
and finally let's check our results
v=xyz=3×3×1.5=13.5
learn more about volume from here: brainly.com/question/28238693
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The equivalent resistance across the battery is 27 ohms. The total battery current is 0.37 A.
The terms "analog" and "digital" refer to how information is encoded to change the voltages and currents in a circuit.
In this circuit, there is no information going on, and nothing is changing. If you had an analog or digital circuit and you needed some reference voltages for it, the little piece of electronics in this picture could be used in either type.