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1. Calculate the speed at which gasoline is transported through a 20cm diameter pipe with a rate of 0.985 m3/s

A. v= (0.628 m²) / (0.985 m³/s) = 0.63 m/s

B. v= (0.985 m³/s) / (0.0314 m²) = 31.36m/s

C. v= (0.1256 m²) / (0.985 m³/s) = 0.12 m/s

D. v= (0.0314 m²) / (0.985 m³/s) = 0.03 m/s

2. Calculate the force that must be applied on a surface of 15m so that there is a pressure of 600 N/m2

A. 9000 N

B. 40 N

C. 90 N

D. 400 N

3. An electric heater has a label that specifies that said device consumes 110 volts and a power of 660 watts, calculate the current intensity that passes through said device.

A. 79 A

B. 6 A

C. 100 A

D. 30 A

4. Since the protons are positively charged, the ___________ force, which is an attractive force, is responsible for holding them together.

a. centripetal

B. nuclear.

C repulsive electrical

d .magnetic

5. An alternating current generator works 120V. By means of a transformer with a primary coil of 1000 turns, if it operates a 9V lamp. How many turns will the secondary coil of the transformer have?

A. 750 laps

B. 13,000 turns

c. 75 laps

D. 120,000 turns

6. A 6-liter container contains a sample of gas at a pressure of 200 pascal. What is the new pressure of the gas sample if it is placed in a 3-liter container?

A. 1200 Pa

b.600Pa

c. 400 Pa

D. 180Pa

7. In a swimming pool, the origin is located in a corner and the long side coincides with the X axis. At a point A inside the pool, a swimmer starts swimming with a speed of 10 m/s and an angle of 43 with respect to the X axis in the direction of a corner. If the swimmer reaches the corner 0.5 seconds after starting the movement, how far was he from the corner?

A. 5.0 m

B. 25.0 m

C. 2.66 m

D. 50.0 m