Answer:
<h2>
$228</h2>
Explanation:
Given data
Total electricity consumption = 2400 kWh
Rate of consumption = 9.5 cent per kWh
converting cent to dollar we have. 9.5/100= $0.095
hence the bill is 2400*0.095= $228
Explanation:
Below is an attachment containing the solution.
Answer:
Due to energy loss while collision ball will not reach to same height while if there is no energy loss then in that case ball will reach to same height
Explanation:
As we know that initially ball is held at height h = 40 cm
So here we can say that kinetic energy of the ball is zero and potential energy is given as
![U = mgH](https://tex.z-dn.net/?f=U%20%3D%20mgH)
now when strike with the ground then its its fraction of kinetic energy is lost in form of other energies
So the ball will left rebound with smaller energy and hence it will reach to height less than the initial height
While if we assume that there is no energy loss during collision then in that case ball will reach to same height again
Answer:
v = 2591.83 m/s
Explanation:
Given that,
The electric field is 1.27 kV/m and the magnetic field is 0.49 T. We need to find the electron's speed if the fields are perpendicular to each other. The magnetic force is balanced by the electric force such that,
![qE=qvB\\\\v=\dfrac{E}{B}\\\\v=\dfrac{1.27\times 10^3}{0.49}\\\\v=2591.83\ m/s](https://tex.z-dn.net/?f=qE%3DqvB%5C%5C%5C%5Cv%3D%5Cdfrac%7BE%7D%7BB%7D%5C%5C%5C%5Cv%3D%5Cdfrac%7B1.27%5Ctimes%2010%5E3%7D%7B0.49%7D%5C%5C%5C%5Cv%3D2591.83%5C%20m%2Fs)
So, the speed of the electron is 2591.83 m/s.