The lunar mare are younger than any of the craters that sit in them

Indicate whether the statement is true or false


FALSE

Physics & Space Science

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The coefficient of static friction is always larger than the coefficient of kinetic friction

Indicate whether the statement is true or false

Physics & Space Science

What is the de Broglie wavelength for a proton (m = 1.67 × 10^-27 kg) moving at a speed of 3.0 × 10^6 m/s? (h = 6.63 × 10^-34 J×s)

a. 0.33 × 10^-13 m c. 0.66 × 10^-13 m b. 1.3 × 10^-13 m d. 2.0 × 10^-13 m

Physics & Space Science

Compound Microscope: A microscope has an objective lens of focal length 1.40 mm and an eyepiece of focal length 20.00 mm. It is adjusted for minimum eyestrain for persons with a near point of 25.0 cm. A blood sample is placed 1.50 mm from the objective. How far apart are the lenses?

A. 20 mm B. 21 mm C. 23 mm D. 41 mm

Physics & Space Science

Which of the following polyatomic ions has a doubly negative charge?

a. Acetate b. Sulfate c. Phosphate d. Ammonium

Physics & Space Science