Answer:
One example of a medium is air.
Explanation:
Answer :
0.5 Ω
Explanation:
The following data were obtained from the question:
Voltage (V) = 7.2 V
Current (I) = 14.4 A
Resistance (R) =..?
The resistance of the motor can be obtained by applying the ohm's law equation as shown below:
V = IR
7.2 = 14.4 × R
Divide both side by 14.4
R = 7.2/14.4
R = 0.5 Ω
Therefore, the resistance is 0.5 Ω
Answer:
Explanation:
The volume of a sphere is:
V = 4/3 * π * a^3
The volume charge density would then be:
p = Q/V
p = 3*Q/(4 * π * a^3)
If the charge density depends on the radius:
p = f(r) = k * r
I integrate the charge density in spherical coordinates. The charge density integrated in the whole volume is equal to total charge.
Since p = k*r
Q = p*π^2*r^3 / 2
Then:
p(r) = 2*Q / (π^2*r^3)
Answer:
F = 518.4 KN
Explanation:
From work energy theorem;
Energy = workdone
In this case, Energy is kinetic energy and has a formula ½mv²
Thus;
Fd = ½mv²
We are given;
Mass of car; m = 1600 kg
Speed of car after crash; v = 18 m/s
Distance from dummy to steering wheel; d = 0.5 m
Thus;
½ × 1600 × 18² = F × 0.5
This gives;
800 × 324 = 0.5F
F = 800 × 324/0.5
F = 518400 N
F = 518.4 KN
Gravitational I think would be the answer, Hope this helps!