Answer: ![N43.2](https://tex.z-dn.net/?f=N43.2)
Explanation:
Given
Power consumption of bulb and water are
and ![240\ W](https://tex.z-dn.net/?f=240%5C%20W)
If the Devices are on for four hours
Total power of devices ![60+240=300\ W](https://tex.z-dn.net/?f=60%2B240%3D300%5C%20W)
Energy consumed for 4 hours is
![\Rightarrow 300\times 4=1200 Wh\\\Rightarrow 1.2\ kWh](https://tex.z-dn.net/?f=%5CRightarrow%20300%5Ctimes%204%3D1200%20Wh%5C%5C%5CRightarrow%201.2%5C%20kWh)
For 30 days it is ![1.2\times 30=36\ kWh](https://tex.z-dn.net/?f=1.2%5Ctimes%2030%3D36%5C%20kWh)
Cost for 30 days ![36\times 1.2=43.2\ N](https://tex.z-dn.net/?f=36%5Ctimes%201.2%3D43.2%5C%20N)
Answer: The block of 0.4 Kg travel the same distance that the block of
0.2 Kg
Explanation: Considering the second newton law, we have the following
F= m*a
F= P*sin (θ) where θ is the angle for the incline
so mg sin (θ)= m*a
a=g sin(θ)
both block have the same acceleration in the inclined plane so travel the same distance independent of its mass.
Answer: sorry here’s the answers, I didn’t feel like typing it all
Explanation:
Answer: M^-1 L^-3T^4A^2
Explanation:
From coloumb's law
K = q1q2 / (F × r^2)
Where;
q1, q2 = charges
k = constant (permittivity of free space)
r = distance
Charge (q) = current(A) × time(T) = TA
THEREFORE,
q1q2 = (TA) × (TA) = (TA)^2
Velocity = Distance(L) / time(T) = L/T
Acceleration = change in Velocity(L/T) / time (T)
Therefore, acceleration = LT^-2
Force(F) = Mass(M) × acceleration (LT^-2)
Force(F) = MLT^-2
Distance(r^2) = L^2
From ; K = q1q2 / (F × r^2)
K = (TA)^2 / (MLT^-2) (L^2)
K = T^2A^2M^-1L^-1T^2 L^-2
COLLEXTING LIKE TERMS
T^2+2 A^2 M^-1 L^-1-2
M^-1 L^-3T^4A^2