Answer:
f = 3.102 Hz
Explanation:
In this case you have that the required voltage is the maximum induced emf produced by the rotating generator.
In order to calculate the frequency of rotation of the generator that allows one to obtain 12.0V you use the following formula:
(1)
N: turns of the armature = 95
B: magnitude of the magnetic field = 0.800T
A: area of the square armature = (9.0cm)^2 = (0.09m)^2 = 8.1*10^-3 m^2
emf_max = 12.0V
w: angular frequency
you solve the equation (1) for w:
Then, the frequency is:
This question can be solved with the help of the equations of motion.
A) The Frisbee will remain in the air for "5.87 s".
B) The frisbee will go "29.4 m" down the range.
A)
To calculate the time, the frisbee will remain in the air, we will use the second <em><u>equation of motion</u></em>, for the vertical motion.
where,
h = height = 169.2 m
vi = initial velocity's vertical component = 0 m/s
g = acceleration due to gravity = 9.81 m/s²
t = time = ?
Therefore,
<u>t = 5.87 s</u>
<u />
B)
Now, we will calculate the horizontal range by applying the equation for constant motion. Because the velocity in the horizontal direction will remain constant due to no air resistance
s = vt
where,
s = horizontal range = ?
v= initial velocity's horizontal component = 5 m/s
t = time = 5.87 s
Therefore,
s = (5 m/s)(5.87 s)
<u>s = 29.4 m</u>
<u />
Learn more about <em><u>equations of motion</u></em> here:
brainly.com/question/9772550?referrer=searchResults
Answer:
C) It increases to 2.0 cm
Explanation:
In a double-slit diffraction experiment, the distance on the screen between two adjacent maxima is given by
where
is the wavelength of the wave
D is the distance of the screen from the slits
d is the separation between the slits
In this problem, the initial distance between adjacent maxima is 1.0 cm. Later, the slit separation is cut in a half, which means that the new slit separation is
Substituting into the equation, we find that the new separation between the maxima is
So, the distance increases by a factor 2: therefore, the new separation between the maxima will be 2.0 cm.
<h2>Answer: 10,000 times
</h2>
Thomas Alva Edison was a North American scientist and inventor who is credited with the design of the electric bulb and many other patented inventions.
However, the bulb did not come out on the first attempt, and was sometimes questioned by his repeated "failures". But his patience and perseverance paid off, after approximately 10,000 attempts, he managed to obtain an incandescent bulb that would last for a long time.
It should be noted that Edison was once asked if he considered that he had had many failures before making the bulb work, hence his famous phrase:
<h2><em>“I have not failed 10,000 times—I’ve successfully found 10,000 ways that will not work.”
</em></h2>
That is why Edison is considered an example of perseverance.
Answer:
306J
Explanation:
The formula for kinetic energy is given as ½mv².
Using this, we get our answer by substituting the values into the formula.
½ × 0.145kg × 65m/s
= 306.31J
can be rounded off to 306J
