What is meant by the "normal" to a surface?
a. a line perpendicular to the surface at a given point
b. the angle between the surface and the light ray
c. a line parallel to the surface at a given point
d. the direction of a reflected ray
A
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A ball is thrown at a 40.0° angle above the horizontal across level ground. It is released from a height of 2.00 m above the ground with a speed of 18.0 m/s. What is the maximum height above the ground that the ball reaches?
A) 24.0 m B) 26.5 m C) 16.2 m D) 8.82 m E) 6.82 m
What type of bond is(are) individually weakest?
a. hydrogen b. ionic c. covalent d. Hydrogen and covalent are equally weak. e. Ionic and covalent are both weaker than hydrogen.
An emission nebula appears primarily ________ in color, due to ionized hydrogen
Fill in the blank(s) with correct word
In referring to how much matter a body contains, we use the term
1) volume 2) mass 3) weight and the force of gravitational attraction upon a body is 4) weight. 5) volume. 6) mass.