Acoach wants to see how long the members of the swim team can hold their breath. he times each member and finds that the average is 53 seconds. what type of study is this? experiment double-blind study

Observational study

Asolar eclipse occurs when the moon gets between earth and the sun, and the moon casts a shadow over earth. a solar eclipse can only take place at the phase of new moon, when the moon passes directly between the sun and earth and its shadows fall upon earth's surface.