A pedometer is a device that is used to measure the estimated distance traveled by foot through recording the number of steps made. A pedometer has benefited people at high risk for type 2 diabetes, because these people are believed to have a sedentary lifestyle and that they are encouraged to do exercise more often. And with the use of this device, they can track how much activity they get and if they need more.
Answer: High voltage transmission minimizes energy losses during electricity transmission.
Explanation:
When electricity is to be transmitted over a long distance, high voltage transmission is preferred to minimize energy losses due to heat.
The higher the transmission voltage, the lower the current and the lesser the resitance in the wire and the lesser the energy lost due to heat during transmission.
High voltage transmission in kilowatts enables light weight cables to be used for long distance electricity transmission.
This explains why, even though only 110 V may be required at home by some appliances, but electricity is transmitted in kilovolts and often require a stepdown transformer
The equation for work (W) done by an electric field is:
W = qΔV
where q is the magnitude of the charge and ΔV is the potential difference. The question gives you W and q, so plug n' play to find ΔV:
10 = 2ΔV
ΔV = 5
Answer: A
Explanation: the principle of friction with swinging and colliding balls.