Two coherent waves reach the same point in phase. One wave has an intensity of 8.00 units and the other has an intensity of 4.00 units. What is the intensity of the superposed wave?
A. 4.00 units
B. 8.00 units
C. 12.0 units
D. 23.3 units
E. 24.0 units
D. 23.3 units
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When you walk at an average speed of 4 m/s, in 5 s you'll cover a distance of
A) 2 m. B) 10 m. C) 15 m. D) 20 m.
An object of mass 6 kg has a speed of 4 m/s and moves a distance of 2 m. What is its kinetic energy in joules?
a. 48 J b. 24 J c. 17 J d. 12 J
A hot dog pants
A) to help evaporation occur in its mouth and bronchial tract. B) to bring more oxygen into its lungs. C) for no particular reason—some things just happen. D) to appear sexually appealing.
An 80,000-kg airliner is flying at 900 km/h at a height of 8.00 km. What is its total energy (kinetic + potential) if the total was 0 when the airliner was at rest on the ground?
a. 250 MJ c. 8770 MJ b. 478 MJ d. 10,300 MJ