Answer:
Entonces, velocidad instantánea = | v | = 0,25 m / s
Explanation:
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Solución
La velocidad instantánea está dada por,
v = dx / dt = pendiente de la curva x-t
aquí, del gráfico:
en x = 1 m ---> t = 8 s
en x = 3 m ---> t = 0 s
entonces, dx = 1-3 = -2 m
dt = 8-0 = 8 s
Entonces,
v = -2/8
v = -0,25 m / s
Dado que, pseed es una cantidad escalar.
Entonces, velocidad instantánea = | v | = 0,25 m / s
Answer:
C) High voltage to low voltage
Explanation:
At a power plant, there is a production of electricity at a high voltage compared to the voltage provided to our home.
Voltage of about 12 KV is produced by power plant which is then converted into about 400 KV or greater (depending upon the countries) to transfer electricity from power plant to city Grid station using Step-up transformer. At City Grid station, Step-down transformer is used to convert high voltage (about 400 KV) to low voltage (about 13 KV) to transfer electricity from grid station to the city. Then this low voltage (about 13 KV) again converted to 220 V using Step-down transformer for household usage. So, overall about 12 KV voltage at power plant is converted into 220 V for household usage using step-up and step-down transformer at different stages.
The woman on the platform is correct because it is the pace of the man moving on the train not walking.
Answer:
that should be the right answer
Answer:
Explanation:
The efficiency of a reversible heat engine is given by:
where
Tc is the cold temperature (outlet temperature)
Th is the hot temperature (temperature of the source)
In this problem, we know:
So, we can calculate the outlet temperature by re-arranging the formula:
