Answer:
A: 1.962
B: 3.924
Explanation:
g = G *M /R^2
g = 9.807*M/R^2 the gravitational constant of ground level on earth is about 9.807
g = 9.807*5lbs/R^2 the average brick is about 5 pounds.
g = 9.807*5*10^2. I'm assuming the height is around ten feet to help you out.
with these numbers plugged in you get an acceleration of 0.4905 a final velocity after 4 seconds 1.962. It's height fallen after 4 seconds is 3.924.
( M = whatever the brick weighs it's not specified in the question)
(R = the distance from the ground or how high the scaffold is)
(hopefully you can just plug your numbers in there hope this helps)
Answer
Given,
Current, I = 14.6 A
magnetic force per unit length = 0.119 N/m
Magnitude of magnetic field = B = ?
a) F = ILB sin θ
θ = 90°
So,
b) The direction of magnetic field is in +z direction.
To find wave speed, you multiply the wavelength by the frequency. This means it is 8 times 11. This gives you 88. That means the answer is 88mm/s
Answer:
<em>The signal x[n] = 16000 samples</em>
Explanation:
From the question,
S = x/t ................................... Equation 1
making x the subject of the equation
x = St .................................. Equation 2
Where S = sample rate ( samples per seconds), x = signal (samples), t = time ( seconds)
<em>Given: S = 8000 samples, t = 2 seconds.</em>
<em>Substituting these values into equation Equation 2</em>
<em>x = 8000×2</em>
<em>x = 16000 samples.</em>
<em>Thus the signal x[n] = 16000 samples</em>
The wave travels at the speed of sound in water:
.
The frequency of the wave is
so we can find its wavelength
by using the basic relationship between frequency, wavelength and speed of the wave: