A spring-powered dart gun is un-stretched and has a spring constant 16.0 N/m. The spring is compressed by 8.0 cm and a 5.0 gram projectile is placed in the gun. The kinetic energy of the projectile when it is shot from the gun is
A. 0.125 J.
B. 0.090 J.
C. 0.075 J.
D. 0.051 J.
E. 0.030 J.
D. 0.051 J.
Physics & Space Science
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According to current understanding, the first generation of stars in the universe ________ than differ stars born today.
A) were much more massive B) contained much more hydrogen and helium C) were much cooler in temperature D) were much more likely to be members of binary star systems
Physics & Space Science
Which of the following planets has the least substantial atmosphere?
A) Mercury B) Mars C) Earth D) Neptune E) Venus
Physics & Space Science
A 200-? resistor is rated at 1/4 W. What is the maximum current it can safely draw?
A) 0.035 A B) 0.35 A C) 50 A D) 0.25 A
Physics & Space Science
The lesser amount of a substance in a solution is generally called the
a. solute. b. salt. c. solvent. d. alloy.
Physics & Space Science