The imaginary, huge, apparently moving sphere on which the stars appear to be mounted is called the ______________ sphere
Fill in the blank(s) with correct word
celestial
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A constant force is acting on an object. Which of these graphs best represents the velocity of the object?
A. 
B. 
C. 
A styrofoam container used as a picnic cooler contains a block of ice at 0°C. If 225 grams of ice melts in 1 hour, how much heat energy per second is passing through the walls of the container? (The heat of fusion of ice is 3.33 × 105 J/kg).
What will be an ideal response?
Instructions: On occasion, the notation 
will be a shorthand notation for 
.
If 
= [10 m, 30°] and 
= [25 m, 130°], what is the magnitude of the sum of these two vectors?
A. 20 m
B. 35 m
C. 15 m
D. 25 m
E. 50 m
In a self-sustaining fusion reaction, such as occurs in the sun,
A) energy is destroyed. B) nuclear energy is created from other forms of energy. C) energy is created. D) thermal energy is converted to nuclear energy. E) nuclear energy is converted to other forms of energy.