How large should a wall-mounted mirror be to view the upper half of one's height, h?
a. h
b. h/2
c. h/4
d. The answer is not given.
c
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At the root of the tree of life
A) is the common ancestor of all life on Earth B) is the common ancestor of all mammals C) are viruses D) are human beings
How does the Solar Nebula theory explain the formation and orbital properties of planets?
What will be an ideal response?
A solid wood door, 90.0 cm wide by 2.00 m tall has a mass of 35.0 kg. It is open and at rest. A small 500-g ball is thrown perpendicular to the door with a speed of 20.0 m/s and hits the door 60.0 cm from the hinged side
The ball rebounds with a speed of 16.0 m/s along the same line. What is the angular speed of the door just after the collision with the ball? A) 0.127 rad/s B) 0.925 rad/s C) 1.14 rad/s D) 2.28 rad/s E) 4.57 rad/s