A child drops a toy at rest from a point 4.0 m above the ground at the same instant her friend throws a ball upward at 6 m/s from a point 1.0 m above the ground. At what distance above the ground do the ball and the toy cross paths?
What will be an ideal response?
2.78 m
Physics & Space Science
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Atomic Nucleus: In a 
Nb nucleus, how many protons, neutrons, and electrons are found there?
A. 41, 52, 93 B. 41, 52, 41 C. 52, 41, 41 D. 41, 52, 0 E. 93, 41, 93
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Saturn's rings are edge-on and vanish when it is at:
A) opposition. B) conjunction with the Sun. C) greatest elongation. D) equinox. E) solstice.
Physics & Space Science
What are the mechanisms that restrict the mass range of stars to about 0.1 to 100 solar masses?
What will be an ideal response?
Physics & Space Science
A 120-V rms signal at 60.0 Hz is applied across a 30.0-mH inductor and a 100-? resistor. What is the rms value of the voltage across the resistor?
A) 119 V B) 60.0 V C) 100 V D) 110 V E) 0.700 V
Physics & Space Science