There are more atoms in a glass of water than stars in the observable universe
Indicate whether the statement is true or false
TRUE
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Marcia places a lead block and an iron block on the table, and hits both of them with the same force. The lead block is twice as massive as the iron block. The acceleration of the lead block is
A) half that of the iron block. B) a quarter of that of the iron block. C) equal to that of the iron block. D) two times that of the iron block. E) four times that of the iron block.
A disturbance in particle motion parallel to the wave velocity is called a
a. transverse wave. b. acoustic wave. c. standing wave. d. longitudinal wave.
What is the minimum thickness of a coating of magnesium fluoride (n = 1.38) applied to glass (n = 1.50) that gives a minimum reflection for 600 nm light?
A. 600 nm B. 300 nm C. 435 nm D. 109 nm E. 100 nm
When a proton and an antiproton collide
a. they destroy each other and produce energy in the form of gamma rays. b. one of the protons is converted to a neutron and they form nucleus of one proton and one neutron. c. one of the protons is converted to an electron and they form a hydrogen atom. d. one proton is converted to a neutron and the other is converted to an electron. e. A proton and an antiproton can not collide because the Coulomb barrier is too great.