A 2.0-kg mass is projected from the edge of the top of a 20-m tall building with a velocity of 24 m/s at some unknown angle above the horizontal. Disregard air resistance and assume the ground is level. What is the kinetic energy of the mass just before it strikes the ground?
a. 0.18 kJ
b. 0.97 kJ
c. 0.89 kJ
d. 0.26 kJ
e. 0.40 kJ
b
Physics & Space Science
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A series circuit has a 100-? resistor, 4.00-mH inductor and a 0.100-?F capacitor connected across a 120-V rms ac source at the resonance frequency. What is the power dissipated by the circuit?
A) 120 W B) 45.8 W C) 160 W D) 100 W E) 144 W
Physics & Space Science
A(n) ______________ fault occurs as the result of expansive forces
Fill in the blank(s) with correct word
Physics & Space Science
Why don't we see very many low-mass exoplanets?
What will be an ideal response?
Physics & Space Science
The basic physical principal principle that explains the operation of rocket engines is
A) the atomic hypothesis. B) the law of force pairs. C) Galileo's principle of falling. D) the law of inertia. E) Actually, rockets are unexplainable.
Physics & Space Science