SYND 8 11 75 KING JUAN CARLOS VISITS GENERAL FRANCO IN HOSPITAL

What is the primary unit of time that is introduced in the video?

• Day

• Second

• Minute

• Hour

How is a second primarily defined?

• By the rotation of the Earth

• By the vibration of cesium atoms

• By the orbit of the moon

• By the position of the sun

Which of the following is NOT a method to measure a second?

• Mechanical watches

• Sundials

• Atomic clocks

• Water clocks

In which field is the precise measurement of seconds crucial?

• Astronomy

• Cooking

• Painting

• Gardening

Why are seconds important in scientific experiments?

• They are used to calculate distances

• They help in identifying chemical compositions

• They are used to measure time intervals accurately

• They help in determining the color of substances