Answer:
Television's use 2 portions of the electromagnet spectrum and that is Visible light and radio waves.
Explanation:
Visible light helps us see the picture on the television and radio waves are used to send pictures to television's screen.
Answer:
763.94Wh
Explanation:
If the load is 120 watts running for 4 hours per night, the energy consumed is
120*4 =480 Wh
So, the energy gathered by the PV array is
E=480/(77%*96%*85%)=763.94Wh
Explanation:
CAD (computer-aided design) software is used by architects, engineers, drafters, artists, and others to create precision drawings or technical illustrations. CAD software can be used to create two-dimensional (2-D) drawings or three-dimensional (3-D) models
Answer:
a) 0.01
b) 150 cm^3/s
c) 300 cm^3/s
d) 25 cm^3/s
Explanation:
a) We know that :
Q=ΔP/R
R=8ηl/π*r^4
Givens:
r^2 = 0.1 r_1
Plugging known information to get :
Q=ΔP/R
=ΔP*π*r^4/8*η*l
Q_2/r_2^4 =Q_1/r_1^4
Q_2=Q_1/r_1^4*r_2^4
=Q_1/r_1^4*r*0.0001*r_1^4
Q_2 = 0.01
b) From the rate flow of the fluid we know that :
Q=ΔP/R (1)
F=η*Av/l (2)
R=8*ηl/π*r^4 (3)
<em>Where: </em>
ΔP is the change in the pressure .
r is the raduis of the tube .
l is the length of the tube .
η is the coefficient of the vescosity of the fluid .
R is the resistance of the fluid .
Givens: Q1 = 100 cm^3/s , ΔP= 1.5
Plugging known information into EQ.1 :
Q=ΔP/R
Q_2/ΔP2=Q_1/ΔP
Q_2=150 cm^3/s
c) we know that :
F = η*Av/l
can be written as :
ΔP = F/A = η*v/l
Givens: η_2 = 3η_1
Q=ΔP/R
Q=η*v/l*R
Q_2/η_2=Q_1/η_1
Q_2=300 cm^3/s
d) We know that :
Q=ΔP/R
R=8*ηl/π*r^4
Givens: l_2 = 4*l_1
Plugging known information to get :
Q=ΔP/R
Q=ΔP*π*r^4/8*ηl
Q_2/l_2=Q_1/l_1
Q_2 = 25 cm^3/s