Electric force depends on the charge and the strength of the electric field. The equation that relates the three:
F = Eq where q is the charge and E is the electric field strength.
Either a or b
not exactly sure which
Answer:
The acceleration due to gravity of that planet is, gₐ = 1.25 m/s²
Explanation:
Given that,
Mass of the planet, m = 1/2M
Radius of the planet, r = 2R
Where M and R is the mass and radius of the Earth respectively.
The acceleration due to gravity of Earth, g = 10 m/s²
The acceleration due to gravity of Earth is given by the relation,
g = GM/R²
Similarly, the acceleration due to gravity of that planet is
gₐ = Gm/r²
where G is the Universal gravitational constant
On substituting the values in the above equation
gₐ = G (1/2 M)/4 R²
= GM/8R²
= 1/8 ( 10 m/s²)
= 1.25 m/s²
Hence, the acceleration due to gravity of that planet is, gₐ = 1.25 m/s²
Answer: The energy of dog is 
Explanation:
The energy which a body possesses by virtue of being in motion is called as kinetic energy.
m = mass of body in kg
v = speed of body in m/s
Thus kinetic energy of dog is
Answer:
L=5882.35 m
Explanation:
Given that
Area ,A= 1 cm²
Resistivity ,ρ = 1.7 x 10⁻⁸ Ω ∙ m
Resistance ,R= 1 Ω
Lets take length of the wire = L
Resistivity =ρ
Resistance =R
Area =A
Resistance =R
Now by putting the values in the above equation get
L=5882.35 m
Therefore the length of the wire will be 5882.35 m.
