Answer:
True
Explanation:
The radio transmitter generates the radio frequency
As you move away from the radio transmitter, the radio frequency decreases
The relationship between frequency and wavelength is inverse
As the frequency decreases the wavelength of the radio signal increases
Answer:
Both are found next to visible light on the electromagnetic spectrum.
i know because i just took the test trust me i choose Both are found next to visible light on the electromagnetic spectrum. and got it wrong it said the answer was Both are found next to visible light on the electromagnetic spectrum.
Explanation:
Answer:
So the minimum force is
32.2Newton
Explanation:
To solve for the minimum force, let us assume it to be F (N)
So
F=mgsinA
But
=>>>> coefficient of static friction x (F + mgcosA
=>3 x 9.8 x sin35 = 0.3 x (F + 3 x 9.8 x cos35)
So making F subject of formula
F + 24.0 = 56.2
F = 32.2N
Answer:
a) It takes 6,37 s b) The Velocity is -59,43 m/s
Explanation:
The initial variables of the balloon are:
Xo = 0 m
Vo = 3 m/s
After one minute the situation is the following:
t= 60 s
X1 = Xo + Vo*t
X1= 0 m + 3 m/s * 60s
X1= 180m
So when the bag falls, its initial variables are the following:
Xo = 180m
X1 = 0m
Vo = 3 m/s
V1= ?
a= -9,8 m/s2
The ecuation of movement for this situation is:
X = Vo*t + 1/2 a*
So:
-180m = 3m/s*t+ 1/2*-9,8 m/s2 *
To solve this we have
a=-9,8/2
b=3
c=180
The formula is:
Replacing, we get to 2 solutions, where only the positive one is valid because we are talking about time.
<u>So the answer a) is t= 6,37 s</u>
With that answer we can find the question b), with the following movement formula.
Vf = Vo + at
Vf = +3 m/s + (-) 9,8 m/s2 *6,37s
b) Vf = -59,43 m/s
Answer:
a) and c).
Explanation:
For a complete destructive interference occur, it must be met the following condition relating the wavelength, and the difference in the paths taken by the sound emitted by the sources until arriving to the listening point:
d = |dA- dB| = (2n-1)*(λ/2)
For n= 1, d = λ/2 = 0.25 m, it doesn't meet any of the cases.
For n=2, d= 3*(λ/2) = 0.75 m
In the case a) we have dA = 2.15 m and dB = 3.00 m, so dB-dA = 0.75 m, which means that in the location stated by case a) a complete destructive interference would occur.
For n=3, d= 5*(λ/2) = 5*0.25 m = 1.25 m.
This is just the case c) because we have dA = 3.75 m and dB = 2.50 m, so dA-dB = 1.25 m, which means that in the location stated by case c) a complete destructive interference would occur also.
The remaining cases don't meet the condition stated above, so the statements found to be true are a) and c),
