According to the law of reflection of light, the angle of incidence is
A) equal to the angle of reflection.
B) smaller than the angle of reflection.
C) greater than the angle of reflection.
A
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Astronomers believe that most of the meteorites come from broken up asteroids and comets, but some of the meteorites are fragments from the Moon or Mars.
Answer the following statement true (T) or false (F)
An object of mass 4 kg is thrown vertically upwards from ground level with an initial speed of 20 m/s. Ignore friction and use g = 10 m/s2. What is the kinetic energy of the object as it reaches its maximum height?
A) 800 J B) 400 J C) 200 J D) 0 J E) 80 J
Which ray diagrams are correct? The three rays in each diagram are distinguished by different types of lines. Hint: Check the behavior of each ray as it interacts with the lens
a.
B and C
b.
C and D
c.
D and E
d.
C and E
e.
C, D and E
Alexander Litvinenko was assasinated with
A. plutonium B. tritium C. radium D. polonium