You want to store 1,000 J of energy in an ideal spring when it is compressed by only 2.5 cm. What should be the force constant (spring constant) of this spring?
What will be an ideal response?
3.2 × 106 m/m
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If the Moon is relatively far from Earth, so that the umbra does not reach Earth, someone directly behind the umbra will see
A) a penumbral lunar eclipse. B) a partial lunar eclipse. C) a partial solar eclipse. D) an annular eclipse. E) no eclipse.
Why can't a massive star generate energy through iron fusion?
What will be an ideal response?
A walker walks 30 m from the origin toward the WEST to point A. She then walks from point A, 20 m more toward the EAST to point B. The walker's total displacement form the origin is
A. 50 m toward the EAST. B. 30 m toward the WEST. C. 20 m toward the WEST. D. 10 m toward the EAST. E. 10 m toward the WEST.
All the planets in the solar system rotate in the same direction as they orbit the Sun
Indicate whether the statement is true or false