If an object is located 20 m to the right of the origin at 1:00 PM, and later the object is located 30 m to the left of the origin at 2:00 PM, then the displacement from 1:00 PM to 2:00 PM is
A. 50 m to the right.
B. 50 m to the left.
C. 30 m to the right.
D. 30 m to the left.
E. 10 m to the left.
A. 50 m to the right.
Physics & Space Science
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Suppose we have a box containing an electron with the lowest possible energy E1. Imagine that we slowly squeeze the box, making its length L smaller. What will happen to the electron’s energy? The electron’s energy will
A. Increase. B. Decrease. C. Remain the same.
Physics & Space Science
What did Democritus do?
Physics & Space Science
A protogalactic cloud with very little angular momentum is more likely to form an elliptical galaxy than a spiral galaxy
Indicate whether the statement is true or false
Physics & Space Science
How many elements have been identified?
a. 92 b. 104 c. 114 d. over 200 e. none of the above
Physics & Space Science