Which of the following reaction energies is the most endothermic?
A) 540 kJ/mole
B) -540 kJ/mole
C) 125 kj/mole
D) -125 kJ/mole
E) not enough information given
Answer: A
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The rigid body shown rotates about an axis through its center of mass and perpendicular to the paper. If M = 2.0 kg and L = 80 cm, what is the kinetic energy of this object when its angular speed about this axis is equal to 5.0 rad/s? Neglect the mass of the connecting rod and treat the masses as particles.
A. 18 J B. 15 J C. 12 J D. 23 J E. 26 J
A 25-g string is stretched with a tension of 43 N between two fixed points 12 m apart. What is the frequency of the second harmonic?
A) 18 Hz B) 24 Hz C) 36 Hz D) 12 Hz E) 6.0 Hz
The current drawn by the heater is __________
Fill in the blank(s) with correct word