The lunar mare are younger than any of the craters that sit in them
Indicate whether the statement is true or false
FALSE
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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
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
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
Which of the following polyatomic ions has a doubly negative charge?
a. Acetate b. Sulfate c. Phosphate d. Ammonium