If the primary coil of a transformer has 200 turns and is supplied with 120 v ac power, how many turns must the secondary coil have to provide 12 v ac power?

How is elevation shown on a topographic map? intermediate contours index contours contour intervals contour lines

A man of mass 80 kg runs up a flight of stairs 20 m high in 10 s. (a) how much power is used to lift the man? (b) If the man's body is 25% efficient, how much power does he expend? (c) This man consumes approximately 1.

AHA recommends for children age 2 and older should participate in a minimum of 30 minutes of moderate-intensity physical activity each day 45 minutes of moderate-intensity physical activity each day 75 minutes of moderate-intensity physical activity

Is it possible for a positive and a negative charge to attract each other?

Within an integrated circuit, each wafer is cut into sections, which A. carry a single circuit and are placed all together in one case. B. have multiple circuits and are placed all together in one case. C.

What does the speed of sound depend on? A. Medium that the sound travels through B. Acoustics C. Frequency of the sound D. Loudness of the sound

Which of these is not a source of the shock waves that lead to protostars?

Which kind of information is known about a person if that person's DNA is in a database? A. how old the person is B. where the person was probably born C. some diseases the person might have D. whether the person is likely to commit a crime

A science teacher ran a marathon. After the race she showed her students the silver blanket she was given to keep her warm. A group of students investigated how the colour of the blanket affected how much infrared radiation is absorbed

Students asked to measure the temperature of a reaction beaker recorded the following temperatures. 103.7°C, 108.4°C, 105.8°C, 104.6°C The actual temperature is 105.1°C. Which measurement is the most precise