The optimal exercise frequency for improving one's health related cardiorespiratory fitness level is three to five days per week.

Indicate whether the statement is true or false.


Answer: False.

Physics & Space Science

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Thermodynamic Devices: An ideal Carnot refrigerator powered from an electrical outlet takes heat from water at 0.0°C and rejects heat to a room at 20.0°C. How much electrical energy must be supplied to the refrigerator so it will convert 78 g of water at 0.0°C to ice at 0.0°C. The latent heat of fusion of water is 3.34 × 105 J/kg.

Fill in the blank(s) with the appropriate word(s).

Physics & Space Science

If the masses of two planets doubles and the distance between them reduces by half, the force between them would be

A) unchanged. B) half as much. C) twice as much. D) four times as much. E) none of the above

Physics & Space Science

Cohort studies start out by measuring exposure and watching for the development of disease.

a. true b. false

Physics & Space Science

A boat has a velocity 12. km/hr Southward and 16. km/hr Westward. What is its speed and how long does it take to travel 94. km?

What will be an ideal response?

Physics & Space Science